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The 'XML2RFC' version 3 Vocabulary
draft-hoffman-xml2rfc-13

The information below is for an old version of the document.
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This is an older version of an Internet-Draft whose latest revision state is "Replaced".
Author Paul E. Hoffman
Last updated 2014-12-02
Replaced by draft-iab-xml2rfc, draft-iab-xml2rfc, RFC 7991
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draft-hoffman-xml2rfc-13
<figure> elements (Section 2.26)

      *  <i> elements (Section 2.28)

      *  <iref> elements (Section 2.29)

      *  <ol> elements (Section 2.36)

      *  <sourcecode> elements (Section 2.49)

      *  <strong> elements (Section 2.51)

      *  <sub> elements (Section 2.52)

      *  <sup> elements (Section 2.53)

      *  <tt> elements (Section 2.63)

      *  <ul> elements (Section 2.64)

      *  <xref> elements (Section 2.67)

2.59.1.  'align' attribute

   Controls whether the content of the cell appears left justified
   (default), centered, or right justified.  Note that "center" or
   "right" probably only work well in cells with plain text; any other
   elements might make the contents render badly.

   Allowed values:

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   o  "left" (default)

   o  "center"

   o  "right"

2.59.2.  'border' attribute

   The width of the border for this cell.  The default is 0, meaning no
   border.

2.59.3.  'colspan' attribute

   The number of columns that the cell to span.  For example, setting
   "colspan='3'" indicates that the cell occupies the same horizontal
   space as three cells in the row above or below this one.

2.59.4.  'rowspan' attribute

   The number of rows that the cell to span.  For example, setting
   "rowspan='3'" indicates that the cell occupies the same vertical
   space as three rows.

2.60.  <thead>

   A container for a set of header rows for a table.

   This element appears as a child element of: <table> (Section 2.55).

   Content model:

   One or more <tr> elements (Section 2.62)

2.61.  <title>

   Represents the document title.

   When this element appears in the <front> element of the current
   document, the title might also appear in page headers or footers.  If
   it is long (~40 characters), the "abbrev" attribute is used to
   specify an abbreviated variant.

   This element appears as a child element of: <front> (Section 2.27).

   Content model: only text content.

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2.61.1.  'abbrev' attribute

   Specifies an abbreviated variant of the document title.

2.61.2.  'ascii' attribute

   The ASCII equivalent of the title.

2.62.  <tr>

   A row of a table.

   This element appears as a child element of: <tbody> (Section 2.56),
   <tfoot> (Section 2.58), and <thead> (Section 2.60).

   Content model:

   One or more sequences of:

   1.  One <td> element

   2.  One <th> element

2.62.1.  'border' attribute

   The width of the border for this row.  The default is 0, meaning no
   border.  If the cells in this row also have "border" attributes,
   those values override this value for those cells.

2.63.  <tt>

   Causes the text to be displayed in a constant-width font.  This
   element can be combined with other character formatting elements, and
   the formatting will be additive.

   This element appears as a child element of: <annotation>
   (Section 2.3), <b> (Section 2.8), <blockquote> (Section 2.11), <c>
   (Section 3.1), <cref> (Section 2.17), <dd> (Section 2.19), <dt>
   (Section 2.22), <em> (Section 2.23), <i> (Section 2.28), <li>
   (Section 2.31), <name> (Section 2.34), <postamble> (Section 3.5),
   <preamble> (Section 3.6), <refcontent> (Section 2.41), <strong>
   (Section 2.51), <sub> (Section 2.52), <sup> (Section 2.53), <t>
   (Section 2.54), <td> (Section 2.57), and <th> (Section 2.59).

   Content model:

   In any order:

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   o  Text

   o  <b> elements (Section 2.8)

   o  <bcp14> elements (Section 2.10)

   o  <cref> elements (Section 2.17)

   o  <em> elements (Section 2.23)

   o  <eref> elements (Section 2.25)

   o  <i> elements (Section 2.28)

   o  <iref> elements (Section 2.29)

   o  <strong> elements (Section 2.51)

   o  <sub> elements (Section 2.52)

   o  <sup> elements (Section 2.53)

   o  <xref> elements (Section 2.67)

2.64.  <ul>

   An unordered list.  The labels on the items will be symbols picked by
   the processor.

   This element appears as a child element of: <aside> (Section 2.6),
   <section> (Section 2.47), <td> (Section 2.57), and <th>
   (Section 2.59).

   Content model:

   One or more <li> elements (Section 2.31)

2.64.1.  'empty' attribute

   Defines whether or not the label is empty. empty="true" indicates
   that no label be shown.

   Allowed values:

   o  "false" (default)

   o  "true"

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2.64.2.  'spacing' attribute

   Defines whether or not there is a blank line between entries.
   spacing="normal" indicates a single blank line, while
   spacing="compact" indicates no space between.

   Allowed values:

   o  "normal" (default)

   o  "compact"

2.65.  <uri>

   Contains a web address associated with the author.

   The contents should be a valid URI (see Section 3 of [RFC3986]).

   This element appears as a child element of: <address> (Section 2.2).

   Content model: only text content.

2.66.  <workgroup>

   This element is used to specify the Working Group (IETF) or Research
   Group (IRTF) from which the document originates, if any.  The
   recommended format is the official name of the Working Group (with
   some capitalization).

   In Internet-Drafts, this is used in the upper left corner of the
   boilerplate, replacing the "Network Working Group" string.
   Formatting software can append the words "Working Group" or "Research
   Group", depending on the "submissionType" property on the <rfc>
   element (Section 2.46.11).

   This element appears as a child element of: <front> (Section 2.27).

   Content model: only text content.

2.67.  <xref>

   Inserts a reference to a different part of a document.

   The generated text depends on whether the <xref> is empty (in which
   case the processor will try to generate a meaningful text fragment),
   and the nature of the referenced document part.

   If the element is empty, a converter must invent text to show for the

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   reference.  If the element is filled in and the format being
   converted to supports links, the text from the element is surrounded
   by a link to the reference.

   Any element that allows the "anchor" attribute can be referenced;
   however, there are restrictions with respect to the text content
   being generated.  For instance, a <t> can be a reference target,
   however, because paragraphs are not (visibly) numbered, the author
   will have to make sure that the prose is sufficient for a reader to
   understand what is being referred to.

   This element appears as a child element of: <annotation>
   (Section 2.3), <b> (Section 2.8), <c> (Section 3.1), <cref>
   (Section 2.17), <dd> (Section 2.19), <dt> (Section 2.22), <em>
   (Section 2.23), <i> (Section 2.28), <li> (Section 2.31), <name>
   (Section 2.34), <postamble> (Section 3.5), <preamble> (Section 3.6),
   <strong> (Section 2.51), <sub> (Section 2.52), <sup> (Section 2.53),
   <t> (Section 2.54), <td> (Section 2.57), <th> (Section 2.59), <tt>
   (Section 2.63), and <ttcol> (Section 3.9).

   Content model: only text content.

2.67.1.  'format' attribute

   This attribute is used to control the format of the generated
   reference text.

   "counter"

      Inserts just a counter; this is used for the number of a section,
      figure, or table.  For example:

     <section anchor="overview">Protocol Overview</section>
     . . .
     See Section <xref target="overview" format="counter"/>
     for an overview.

      might generate

     See Section 1.7 for an overview.

   "default"

      Inserts a text fragment that describes the referenced part
      completely, such as "Section 2" or "Table 4" for internal links,
      or "[XML]" for links to references.  For example:

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     <section anchor="overview">Protocol Overview</section>
     . . .
     See <xref target="overview"/> for an overview.

      might generate

     See Section 1.7 for an overview.

   "none"

      There will be no auto-generated text.  This is useful for creating
      a link that will appear in the processed text.

   "title"

      Inserts a title for the referenced element (usually obtained from
      the referenced element's <name> child element.  If the target is a
      reference, then the <title> element inside the <front> element is
      used.

   Allowed values:

   o  "counter"

   o  "title"

   o  "none"

   o  "default" (default)

2.67.2.  'pageno' attribute

   Deprecated.

   Allowed values:

   o  "true"

   o  "false" (default)

2.67.3.  'relative' attribute

   Specifies a relative reference from the main target.  Rendering
   relative references is based on the format for the converted
   document.

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2.67.4.  'section' attribute

   Specifies a section for the generated reference.  For example,

        See <xref section="2.3" target="RFC6949"/> for more information.

   would generate

        See Section 2.3 of [RFC6949] for more information.

2.67.5.  'sectionFormat' attribute

   The format that the section reference will be displayed in.  The
   acceptable values are:

   o  "of" (default)

   o  "comma"

   o  "parens"

   For example:

     See <xref target="RFC6949" section="2.3" sectionFormat="of"/>
     for more information.
     See <xref target="RFC6949" section="2.4" sectionFormat="comma"/>
     for more information.
     See <xref target="RFC6949" section="2.5" sectionFormat="parens"/>
     for more information.

   would generate

        See Section 2.3 of [RFC6949] for more information.
        See [RFC6949], Section 2.4 for more information.
        See [RFC6949] (Section 2.5) for more information.

2.67.6.  'target' attribute (mandatory)

   Identifies the document component being referenced.

   The value needs to match the value of the "anchor" attribute of
   another element in the document.

3.  Elements from v2 That Have Been Deprecated

   This section lists the elements from v2 that have been deprecated.
   Note that some elements in v3 have attributes from v2 that are
   deprecated; those are not listed here.

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3.1.  <c>

   Deprecated.  Instead, use <tr>, <td>, and <th>.

   This element appears as a child element of: <texttable>
   (Section 3.8).

   Content model:

   In any order:

   o  Text

   o  <b> elements (Section 2.8)

   o  <bcp14> elements (Section 2.10)

   o  <cref> elements (Section 2.17)

   o  <em> elements (Section 2.23)

   o  <eref> elements (Section 2.25)

   o  <i> elements (Section 2.28)

   o  <iref> elements (Section 2.29)

   o  <spanx> elements (Section 3.7)

   o  <strong> elements (Section 2.51)

   o  <sub> elements (Section 2.52)

   o  <sup> elements (Section 2.53)

   o  <tt> elements (Section 2.63)

   o  <xref> elements (Section 2.67)

3.2.  <facsimile>

   Deprecated.  The <email> element is a much more useful way to get in
   touch with authors.

   This element appears as a child element of: <address> (Section 2.2).

   Content model: only text content.

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3.3.  <format>

   Deprecated.  If the goal is to provide a single URI for a reference,
   use the "target" attribute on <reference> instead.

   This element appears as a child element of: <reference>
   (Section 2.42).

   Content model: this element does not have any contents.

3.3.1.  'octets' attribute

   Deprecated.

3.3.2.  'target' attribute

   Deprecated.

3.3.3.  'type' attribute (mandatory)

   Deprecated.

3.4.  <list>

   Deprecated.  Instead, use <dl> for list/@style "hanging"; <ul> for
   list/@style "empty" or "symbols"; and <ol> for list/@style "letters",
   "numbers", "counter", or "format".

   This element appears as a child element of: <t> (Section 2.54).

   Content model:

   One or more <t> elements (Section 2.54)

3.4.1.  'counter' attribute

   Deprecated.  The functionality of this attribute has been replaced
   with <ol>/@start.

3.4.2.  'hangIndent' attribute

   Deprecated.  Use <dl> instead.

3.4.3.  'style' attribute

   Deprecated.

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3.5.  <postamble>

   Deprecated.  Instead, use a regular paragraph after the figure or
   table.

   This element appears as a child element of: <figure> (Section 2.26),
   and <texttable> (Section 3.8).

   Content model:

   In any order:

   o  Text

   o  <b> elements (Section 2.8)

   o  <bcp14> elements (Section 2.10)

   o  <cref> elements (Section 2.17)

   o  <em> elements (Section 2.23)

   o  <eref> elements (Section 2.25)

   o  <i> elements (Section 2.28)

   o  <iref> elements (Section 2.29)

   o  <spanx> elements (Section 3.7)

   o  <strong> elements (Section 2.51)

   o  <sub> elements (Section 2.52)

   o  <sup> elements (Section 2.53)

   o  <tt> elements (Section 2.63)

   o  <xref> elements (Section 2.67)

3.6.  <preamble>

   Deprecated.  Instead, use a regular paragraph before the figure or
   table.

   This element appears as a child element of: <figure> (Section 2.26),
   and <texttable> (Section 3.8).

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   Content model:

   In any order:

   o  Text

   o  <b> elements (Section 2.8)

   o  <bcp14> elements (Section 2.10)

   o  <cref> elements (Section 2.17)

   o  <em> elements (Section 2.23)

   o  <eref> elements (Section 2.25)

   o  <i> elements (Section 2.28)

   o  <iref> elements (Section 2.29)

   o  <spanx> elements (Section 3.7)

   o  <strong> elements (Section 2.51)

   o  <sub> elements (Section 2.52)

   o  <sup> elements (Section 2.53)

   o  <tt> elements (Section 2.63)

   o  <xref> elements (Section 2.67)

3.7.  <spanx>

   Deprecated.

   This element appears as a child element of: <annotation>
   (Section 2.3), <c> (Section 3.1), <postamble> (Section 3.5),
   <preamble> (Section 3.6), and <t> (Section 2.54).

   Content model: only text content.

3.7.1.  'style' attribute

   Deprecated.  Instead of <spanx style="emph">, use <b> instead of
   <spanx style="strong">, use <i>; instead of <spanx style="verg">, use
   <tt>.

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3.7.2.  'xml:space' attribute

   Deprecated.

   Allowed values:

   o  "default"

   o  "preserve" (default)

3.8.  <texttable>

   Deprecated.  Use <table> instead.

   This element appears as a child element of: <aside> (Section 2.6),
   and <section> (Section 2.47).

   Content model:

   In this order:

   1.  One optional <name> element (Section 2.34)

   2.  One optional <preamble> element (Section 3.6)

   3.  One or more <ttcol> elements (Section 3.9)

   4.  Optional <c> elements (Section 3.1)

   5.  One optional <postamble> element (Section 3.5)

3.8.1.  'align' attribute

   Deprecated

   Allowed values:

   o  "left"

   o  "center" (default)

   o  "right"

3.8.2.  'anchor' attribute

   Deprecated

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3.8.3.  'style' attribute

   Deprecated.

3.8.4.  'suppress-title' attribute

   Deprecated.

   Allowed values:

   o  "true"

   o  "false" (default)

3.8.5.  'title' attribute

   Deprecated.

3.9.  <ttcol>

   Deprecated.  Instead, use <tr>, <td>, and <th>.

   This element appears as a child element of: <texttable>
   (Section 3.8).

   Content model:

   In any order:

   o  <cref> elements (Section 2.17)

   o  <eref> elements (Section 2.25)

   o  <iref> elements (Section 2.29)

   o  <xref> elements (Section 2.67)

   o  Text

3.9.1.  'align' attribute

   Deprecated.

   Allowed values:

   o  "left" (default)

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   o  "center"

   o  "right"

3.9.2.  'width' attribute

   Deprecated.

3.10.  <vspace>

   Deprecated.  In earlier versions of this format, <vspace> was often
   used to get an extra blank line in a list element; in the v3
   vocabulary, that can be done instead by using multiple <t> elements
   inside the <li> element.  Other uses have no direct replacement.

   This element appears as a child element of: <t> (Section 2.54).

   Content model: this element does not have any contents.

3.10.1.  'blankLines' attribute

   Deprecated.

4.  Internationalization Considerations

   This format is based on [XML], thus does not have any issues
   representing arbitrary Unicode [UNICODE] characters in text content.
   The RFC Editor may restrict some of the characters that can be used
   in a particular RFC; the rules for such restrictions are covered in
   [NONASCII].

5.  Security Considerations

   The "name" attribute on the <artwork> element (Section 2.5.5) can be
   used to derive a filename for saving to a local file system.
   Trusting this kind of information without pre-processing is a known
   security risk; see Section 4.3 of [RFC6266] for more information.

   The "type" attribute of the <artwork> and <sourcecode> elements is
   meant to encourage processors to automatically extract known types of
   content from an RFC or Internet Draft.  While extraction is probably
   safe, those processors might also think that they could further
   process the extracted content such as by rendering artwork or
   executing code.  Doing so without first sanity-checking the extracted
   content is clearly a terrible idea from a security perspective.  More
   generally, a processor that is reading RFCs or Internet Drafts needs
   to be suspicious of any content that it intends to post-process.

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   All security considerations related to XML processing are relevant as
   well (see Section 7 of [RFC3470]).

6.  IANA Considerations

6.1.  Internet Media Type Registration

   IANA maintains the registry of Internet media types [BCP13] at
   <http://www.iana.org/assignments/media-types>.

   This document updates the specification for the Internet media type
   "application/rfc+xml" from the one in [XML2RFCv2].  The following is
   to be registered with IANA.

   Type name:  application

   Subtype name:  rfc+xml

   Required parameters:  There are no required parameters.

   Optional parameters:  "charset": This parameter has identical
      semantics as the charset parameter of the "application/xml" media
      type specified in Section 9.1 of [RFC7303].

   Encoding considerations:  Identical to those of "application/xml" as
      described in Section 9.1 of [RFC7303].

   Security considerations:  As defined in Section 5.  In addition, as
      this media type uses the "+xml" convention, it inherits the
      security considerations described in Section 10 of [RFC7303].

   Interoperability considerations:  N/A

   Published specification:  This specification.

   Applications that use this media type:  Applications that transform
      xml2rfc to output representations such as plain text or HTML, plus
      additional analysis tools.

   Fragment identifier considerations:  The "anchor" attribute is used
      for assigning document-wide unique identifiers that can be used as
      shorthand pointers, as described in Section 2.8 of [XPOINTER].

   Additional information:

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      Deprecated alias names for this type:  None.

      Magic number(s):  As specified for "application/xml" in Section
         9.1 of [RFC7303].

      File extension(s):  .xml or .rfcxml when disambiguation from other
         XML files is needed

      Macintosh file type code(s):  TEXT

   Person & email address to contact for further information:  See
      Authors Section.

   Intended usage:  COMMON

   Restrictions on usage:  N/A

   Author:  See Authors Section.

   Change controller:  RFC Series Editor (rse@rfc-editor.org)

6.2.  Link Relation Registration

   The following is a proposed addition to [LINKRELATIONS].

   Relation Name: convertedFrom

   Description: The document linked to was later converted to the
   document that contains this link relation.  For example, an RFC can
   have a link to the Internet Draft that became the RFC; in that case,
   the link relation would be "convertedFrom".

   Reference: This document.

   Notes: This relation is different than "predecessor-version" in that
   "predecessor-version" is for items in a version control system.  It
   is also different that "previous" in that this relation is used for
   converted resources, not those that are part of a sequence of
   resources.

   Application Data: none

7.  Acknowledgments

   Thanks to everybody who reviewed this document and provided feedback
   and/or specification text.  Thanks especially go to Julian Reschke
   for editing [XML2RFCv2] and those who provided feedback on that
   document.

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   We also thank Marshall T. Rose for both the original design and the
   reference implementation of the "xml2rfc" processor.

8.  References

8.1.  Normative References

   [XML]            Maler, E., Yergeau, F., Paoli, J., Sperberg-McQueen,
                    M., and T. Bray, "Extensible Markup Language (XML)
                    1.0 (Fifth Edition)", W3C Recommendation REC-xml-
                    20081126, November 2008,
                    <http://www.w3.org/TR/2008/REC-xml-20081126/>.

                    Latest version available at
                    <http://www.w3.org/TR/xml>.

   [XML2RFCv2]      Reschke, J., "The 'XML2RFC' version 2 Vocabulary",
                    draft-reschke-xml2rfc (work in progress), 2014.

8.2.  Informative References

   [BCP13]          Freed, N., Klensin, J., and T. Hansen, "Media Type
                    Specifications and Registration Procedures", BCP 13,
                    RFC 6838, January 2013.

   [DOI]            Levine, J., "Assigning Digital Object Identifiers to
                    RFCs", draft-iab-doi (work in progress), 2014.

   [IDGUIDE]        Housley, R., "Guidelines to Authors of Internet-
                    Drafts",
                    <http://www.ietf.org/id-info/guidelines.html>.

   [LINKRELATIONS]  IANA, "Link Relations", <http://www.iana.org/
                    assignments/link-relations/link-relations.xhtml>.

   [NONASCII]       Flanagan, H., "The Use of Non-ASCII Characters in
                    RFCs", draft-flanagan-nonascii (work in progress),
                    2014.

   [RFC2026]        Bradner, S., "The Internet Standards Process --
                    Revision 3", BCP 9, RFC 2026, October 1996.

   [RFC2397]        Masinter, L., "The "data" URL scheme", RFC 2397,
                    August 1998.

   [RFC2629]        Rose, M., "Writing I-Ds and RFCs using XML",
                    RFC 2629, June 1999.

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   [RFC3339]        Klyne, G., Ed. and C. Newman, "Date and Time on the
                    Internet: Timestamps", RFC 3339, July 2002.

   [RFC3470]        Hollenbeck, S., Rose, M., and L. Masinter,
                    "Guidelines for the Use of Extensible Markup
                    Language (XML) within IETF Protocols", BCP 70,
                    RFC 3470, January 2003.

   [RFC3667]        Bradner, S., "IETF Rights in Contributions",
                    RFC 3667, February 2004.

   [RFC3966]        Schulzrinne, H., "The tel URI for Telephone
                    Numbers", RFC 3966, December 2004.

   [RFC3978]        Bradner, S., "IETF Rights in Contributions",
                    RFC 3978, March 2005.

   [RFC3986]        Berners-Lee, T., Fielding, R., and L. Masinter,
                    "Uniform Resource Identifier (URI): Generic Syntax",
                    STD 66, RFC 3986, January 2005.

   [RFC5741]        Daigle, L. and O. Kolkman, "RFC Streams, Headers,
                    and Boilerplates", RFC 5741, December 2009.

   [RFC6068]        Duerst, M., Masinter, L., and J. Zawinski, "The
                    'mailto' URI Scheme", RFC 6068, October 2010.

   [RFC6266]        Reschke, J., "Use of the Content-Disposition Header
                    Field in the Hypertext Transfer Protocol (HTTP)",
                    RFC 6266, June 2011.

   [RFC6949]        Flanagan, H. and N. Brownlee, "RFC Series Format
                    Requirements and Future Development", RFC 6949,
                    May 2013.

   [RFC7303]        Thompson, H. and C. Lilley, "XML Media Types",
                    RFC 7303, July 2014.

   [RFC7322]        Heather, H. and S. Ginoza, "RFC Style Guide",
                    RFC 7322, September 2014.

   [RFCPOLICY]      RFC Editor, "RFC Editorial Guidelines and
                    Procedures",
                    <http://www.rfc-editor.org/policy.html>.

   [RNC]            Clark, J., "RELAX NG Compact Syntax", OASIS ,
                    November 2002, <http://www.oasis-open.org/
                    committees/relax-ng/compact-20021121.html>.

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   [RNG]            ISO/IEC, "Information Technology - Document Schema
                    Definition Languages (DSDL) - Part 2: Regular-
                    Grammar-Based Validation - RELAX NG. Second
                    Edition.", ISO/IEC 19757-2:2008(E), December 2008.

                    A useful source of RNG-related information is
                    <http://relaxng.org/>.

   [TLP2.0]         IETF Trust, "Legal Provisions Relating to IETF
                    Documents", February 2009, <http://trustee.ietf.org/
                    license-info/IETF-TLP-2.htm>.

   [TLP3.0]         IETF Trust, "Legal Provisions Relating to IETF
                    Documents", September 2009, <http://
                    trustee.ietf.org/license-info/IETF-TLP-3.htm>.

   [TLP4.0]         IETF Trust, "Legal Provisions Relating to IETF
                    Documents", December 2009, <http://trustee.ietf.org/
                    license-info/IETF-TLP-4.htm>.

   [UNICODE]        The Unicode Consortium, "The Unicode Standard,
                    Version 6.3.0", September 2013,
                    <http://www.unicode.org/versions/Unicode6.3.0/>.

   [USASCII]        American National Standards Institute, "Coded
                    Character Set -- 7-bit American Standard Code for
                    Information Interchange", ANSI X3.4, 1986.

   [XInclude]       Marsh, J., Orchard, D., and D. Veillard, "XML
                    Inclusions (XInclude) Version 1.0 (Second Edition)",
                    W3C Recommendation REC-xinclude-20061115,
                    November 2006, <http://www.w3.org/TR/xinclude/>.

                    Latest version available at
                    <http://www.w3.org/TR/xinclude/>.

   [XPOINTER]       Grosso, P., Maler, E., Marsh, J., and N. Walsh,
                    "XPointer Framework", W3C Recommendation REC-xptr-
                    framework-20030325, March 2003, <http://www.w3.org/
                    TR/2003/REC-xptr-framework-20030325/>.

                    Latest version available at
                    <http://www.w3.org/TR/xptr-framework/>.

Appendix A.  Front Page ('Boilerplate') Generation

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A.1.  The /rfc/@category Attribute

   For RFCs, the category attribute (Section 2.46.1) determines the
   "maturity level" (see Section 4 of [RFC2026]).  The allowed values
   are "std" for "Standards Track", "bcp" for "BCP", "info" for
   "Informational", "exp" for "Experimental", and "historic" for
   "Historic".

   For Internet-Drafts, the category attribute is not needed, but will
   appear on the front page as "Intended Status".  Supplying this
   information can be useful to reviewers.

A.2.  The /rfc/@ipr Attribute

   This attribute value can take a long list of values, each of which
   describes an IPR policy for the document (Section 2.46.5).  The
   values are not the result of a grand design, but remain simply for
   historic reasons.  Of these values, only a few are currently in use;
   all others are supported by various tools for backwards compatibility
   with old source files.

      *Note:* some variations of the boilerplate are selected based on
      the document's date; therefore it is important to specify the
      "year", "month" and "day" attributes of the <date> element when
      archiving the XML source of an Internet-Draft on the day of
      submission.

   _Disclaimer: THIS ONLY PROVIDES IMPLEMENTATION INFORMATION.  IF YOU
   NEED LEGAL ADVICE, PLEASE CONTACT A LAWYER._ For further information,
   refer to <http://trustee.ietf.org/docs/IETF-Copyright-FAQ.pdf>.

   For the current "Status Of This Memo" text, the submissionType
   attribute (Section 2.46.11) determines whether a statement about
   "Code Components" is inserted (which is the case for the value
   "IETF", which is the default).  Other values, such as "independent",
   suppress this part of the text.

A.2.1.  Current Values: '*trust200902'

   The name for these values refers to the "IETF TRUST Legal Provisions
   Relating to IETF Documents", sometimes simply called the "TLP", which
   went into effect on February 15, 2009 ([TLP2.0]).  Updates to this
   document were published on September 12, 2009 ([TLP3.0]) and on
   December 28, 2009 ([TLP4.0]), modifying the license for code
   components (see <http://trustee.ietf.org/license-info/> for further
   information).  The actual text is located in Section 6 ("Text To Be
   Included in IETF Documents") of these documents.

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   Formatters will automatically produce the "correct" text depending on
   the document's date information (see above):

   +----------+--------------------------------+
   | TLP      | starting with publication date |
   +----------+--------------------------------+
   | [TLP3.0] | 2009-11-01                     |
   | [TLP4.0] | 2010-04-01                     |
   +----------+--------------------------------+

A.2.1.1.  trust200902

   This value should be used unless one of the more specific
   '*trust200902' values is a better fit.  It produces the text in
   Sections 6.a and 6.b of the TLP.

A.2.1.2.  noModificationTrust200902

   This produces additional text from Section 6.c.i of the TLP:

      This document may not be modified, and derivative works of it may
      not be created, except to format it for publication as an RFC or
      to translate it into languages other than English.

      *Note:* this clause is incompatible with RFCs that are published
      on the Standards Track.

A.2.1.3.  noDerivativesTrust200902

   This produces the additional text from Section 6.c.ii of the TLP:

      This document may not be modified, and derivative works of it may
      not be created, and it may not be published except as an Internet-
      Draft.

      *Note:* this clause is incompatible with RFCs.

A.2.1.4.  pre5378Trust200902

   This produces the additional text from Section 6.c.iii of the TLP,
   frequently called the "pre-5378 escape clause":

      This document may contain material from IETF Documents or IETF
      Contributions published or made publicly available before November
      10, 2008.  The person(s) controlling the copyright in some of this
      material may not have granted the IETF Trust the right to allow
      modifications of such material outside the IETF Standards Process.
      Without obtaining an adequate license from the person(s)

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      controlling the copyright in such materials, this document may not
      be modified outside the IETF Standards Process, and derivative
      works of it may not be created outside the IETF Standards Process,
      except to format it for publication as an RFC or to translate it
      into languages other than English.

   See Section 4 of
   <http://trustee.ietf.org/docs/IETF-Copyright-FAQ.pdf> for further
   information about when to use this value.

      *Note:* this text appears under "Copyright Notice", unless the
      document was published before November 2009, in which case it
      appears under "Status Of This Memo".

A.2.2.  Historic Values

A.2.2.1.  Historic Values: '*trust200811'

   The attribute values "trust200811", "noModificationTrust200811" and
   "noDerivativesTrust200811" are similar to their "trust200902"
   counterparts, except that they use text specified in <http://
   trustee.ietf.org/license-info/archive/
   IETF-Trust-License-Policy_11-10-08.pdf>.

A.2.2.2.  Historic Values: '*3978'

   The attribute values "full3978", "noModification3978" and
   "noDerivatives3978" are similar to their counterparts above, except
   that they use text specified in Section 5 of [RFC3978].

A.2.2.3.  Historic Values: '*3667'

   The attribute values "full3667", "noModification3667" and
   "noDerivatives3667" are similar to their counterparts above, except
   that they use text specified in Section 5 of [RFC3667].

A.2.2.4.  Historic Values: '*2026'

   The attribute values "full2026" and "noDerivativeWorks2026" are
   similar to their counterparts above, except that they use text
   specified in Section 10 of [RFC2026].

   The special value "none" was also used back then, and denied the IETF
   any rights beyond publication as Internet-Draft.

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A.3.  The /rfc/@submissionType Attribute

   The RFC Editor publishes documents from different "document streams",
   of which the "IETF stream" is the most prominent one.  Other streams
   are the "independent stream" (used for things such as administrative
   information or April 1st RFCs), the "IAB stream" (Internet
   Architecture Board) and the "IRTF stream" (Internet Research Task
   Force).

   The values for the attribute are "IETF" (the default value),
   "independent", "IAB", and "IRTF".

   Historically, this attribute did not affect the final appearance of
   RFCs, except for subtle differences in Copyright notices.  Nowadays
   (as of [RFC5741]), the stream name appears in the first line of the
   front page, and it also affects the text in the "Status Of This Memo"
   section.

   For current documents, setting submissionType attribute will have the
   following effect:

   o  For RFCs, the stream name appears in the upper left corner of the
      first page (in Internet Drafts, this is either "Network Working
      Group", or the value of the <workgroup> element).

   o  For RFCs, if affects the whole "Status Of This Memo" section (see
      Section 3.2.2 of [RFC5741]).

   o  For all RFCs and Internet Drafts, it determines whether the
      "Copyright Notice" mentions the Copyright on Code Components (see
      TLP, Section "Text To Be Included in IETF Documents").

A.4.  The /rfc/@consensus Attribute

   For some of the publication streams (see Appendix A.3), the "Status
   Of This Memo" section depends on whether there was a consensus to
   publish (again, see Section 3.2.2 of [RFC5741]).

   The consensus attribute ("yes"/"no", defaulting to "yes") can be used
   to supply this information.  The effect for the various streams is:

   o  "independent" and "IAB": none.

   o  "IETF": mention that there was an IETF consensus.

   o  "IRTF": mention that there was a research group consensus (where
      the name of the research group is extracted from the <workgroup>
      element).

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Appendix B.  The v3 Format and Processors

   This section describes topics that are specific to processors.  Note
   that there is some discussion of processors in the main body of the
   document as well.  For example, some elements have descriptions of
   how a processor might create output from the element.

   A processor has multiple roles.  The processor checks whether or not
   the input is valid XML; it also checks whether or not the input XML
   matches this format.  It may have one or more outputs, depending on
   the way that it is invoked.  It might convert the XML to different
   XML, or to a different representation such as HTML or plain text, or
   do no conversion at all.  It also might give diagnostic warnings
   about how to improve the input.

   In v2, the grammar was specified as a DTD.  In v3, the grammar is
   specified only as Relax Next Generation (RNG).  This means that
   processors need to work from the RNG, not from a DTD.  Some of the
   features of the v3 grammar cannot be specified as a DTD.

   This section differentiates between three types of processors:

   o  RFC Processor -- The processor used by the RFC Editor to process
      the input from one of the RFC streams, and to process XML produced
      during the RFC editing process.

   o  Draft Processor -- The processor used by the Internet Draft
      submission tool.  This processor will be defined in a different
      document.

   o  Private Processors -- There may be processors that are meant to
      run on the computers of authors.  These processors may be used to
      produce interim versions of the non-canonical representations so
      that authors can see how their XML might later be rendered; to
      create documents in representations different than those supported
      by the RFC Editor; to possibly create documents that are not meant
      to be Internet Drafts or RFCs; and to convert XML that has
      external information into XML that has that external information
      included.

   It is expected that a single piece of software will be used for both
   the RFC Processor and the Draft Processor, with different application
   settings to differentiate between them.  It is also expected that the
   same software could be used as a Private Processor; others might
   create Private Processors independently, or using parts of, the
   software used by the RFC Editor.

   The RFC Processor and Draft Processor must have clear error

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   reporting, giving more context than just a line number.  For example,
   the error messages will differentiate between errors in XML and those
   from the v3 format.

   It is expected that both the RFC Processor and the Draft Processor
   will have options to produce different types of output.  For example,
   they might have a "convert XML to XML" option that expands the XML
   entities in the output.

   The restrictions on the canonical XML for RFCs, as well as how the
   non-canonical formats will look, are described at <https://
   www.rfc-editor.org/rse/wiki/
   doku.php?id=design:format-and-content-rfcs>.

B.1.  Including External Text

   All XML processors for v3 are expected to support XInclude
   [XInclude].  XInclude specifies a processing model and syntax for
   general purpose inclusion of information that is either on the
   Internet or local to the user's computer.

   In the v3 syntax, XInclude is expressed as the <xi:include> element.
   To use this element, you need to include the "xi" namespace in the
   <rfc> element; that is, you need to specify

   xmlns:xi="http://www.w3.org/2001/XInclude"

   as one of the attributes in the <rfc> element.

   The most common way to use <xi:include> is to pull in references that
   are already formed as XML.  Currently, this can be done from
   xml2rfc.tools.ietf.org, but later is expected to be from the RFC
   Editor.  For example, if a document has three normative references,
   all RFCs, the document might contain:

   <references>
       <xi:include href="http://xml2rfc.tools.ietf.org/public/rfc/
          bibxml/reference.RFC.2119.xml"/>
       <xi:include href="http://xml2rfc.tools.ietf.org/public/rfc/
          bibxml/reference.RFC.4869.xml"/>
       <xi:include href="http://xml2rfc.tools.ietf.org/public/rfc/
          bibxml/reference.RFC.7169.xml"/>
   </references>

   <xi:include> can be used anywhere an XML element could be used (but
   not where free text is used).  For example, if three Internet Drafts
   are all including a particular paragraph or section verbatim, that
   text can be kept either in a file or somewhere on the web, and be

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   included with <xi:include>.  An example of pulling something from the
   local disk would be:

   <x:include href="file://home/chris/ietf/drafts/commontext.xml"/>

   In general, XInclude should be used instead of ENTITY references and
   XML Processor Instructions (PIs) that allow external inclusions.

B.2.  Anchors and IDs

   People writing and reading Internet Drafts and RFCs often want to
   make reference to specific locations in those documents.  In the case
   of RFC authors, it is common to want to reference another part of
   their document, such as "see Section 3.2 of this document".  Readers,
   on the other hand, want to reference part of documents that they
   didn't write, such as "see Section 3.2 of RFC 6949".  The XML
   vocabulary in this document attempts to support both sets of people.

   Authors can leave anchors in a document that can later be used for
   references with the "anchor" attribute.  Anchors can be included in
   the following elements: <artwork>, <aside>, <blockquote>, <cref>,
   <figure>, <li>, <reference>, <referencegroup>, <section>,
   <sourcecode>, <t>, and <table>.  The author can then refer to that
   anchor in the "target" attribute of the <xref> element.

   Readers can refer to any element that has an "anchor" attribute by
   that attribute.  Note, however, that most of the time, elements won't
   have anchors.  In the common case, the reader wants to refer to an
   element that does not have an "anchor" attribute, but that element
   has "pn" attribute.

   Processors add the "pn" attribute to many elements during processing.
   This attribute and its value are automatically generated by the
   processor if the attribute is not there; if the attribute is already
   there, the processor may replace the value.

B.2.1.  Overlapping Values

   In the HTML representation of this XML vocabulary, both anchors and
   "pn" attributes will be used in the "id" attributes of elements.
   Thus, there can be no overlap between the names entered in "anchor"
   attributes, in "slugifiedName" attributes, and those that are
   generated for the "pn" attributes.  Also, there are some values for
   the "anchor" values that are reserved for sections, and those
   sections can only have those anchor values.

   The following rules prevent this overlap:

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   o  "pn" for regular sections always has the format "s-nnn", where
      "nnn" is the section or appendix number.  For example, this would
      be "s-2.1.3" for Section 2.1.3 and "s-a" for Appendix A.  For the
      <abstract> element, it is always "s-abstract".  For the <note>
      element, it is always "s-note-nnn", where "nnn" is a sequential
      value.

   o  "pn" for <figure> elements always has the format "f-nnn", where
      "nnn" is the figure number.  For example, this would be "f-5" for
      Figure 5.

   o  "pn" for <table> elements always has the format "t-nnn", where
      "nnn" is the figure number.  For example, this would be "t-5" for
      Table 5.

   o  "pn" for all elements not listed above always has the format
      "p-nnn-mmm", where "nnn" is the section number and "mmm" is the
      relative position in the section.  For example, this would be
      "p-2.1.3-7" for the seventh part number in Section 2.1.3.

   o  "slugifiedName" always has the format "n-ttt", where "ttt" is the
      text of the name after slugification.  For example, this would be
      "n-protocol-overview" for the name "Protocol Overview".  The
      actual conversions done in slugification will be specified at a
      later time.

   o  Anchors must never overlap with any of the above.  The easiest way
      to assure that is to not pick an anchor name that starts with a
      single letter followed by a hyphen.  If an anchor does overlap
      with one of the types of names above, the processor will reject
      the document.

Appendix C.  Relax NG Schema

   The following is the RelaxNG schema for the v3 format.

   namespace a = "http://relaxng.org/ns/compatibility/annotations/1.0"

   nrfc =
     element rfc {
       attribute number { text }?,
       [ a:defaultValue = "" ] attribute obsoletes { text }?,
       [ a:defaultValue = "" ] attribute updates { text }?,
       attribute category { "std" | "bcp" | "info" | "exp" | "historic"
   }?,
       attribute consensus { "no" | "yes" }?,
       attribute seriesNo { text }?,

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       attribute ipr {
         "full2026"
         | "noDerivativeWorks2026"
         | "none"
         | "full3667"
         | "noModification3667"
         | "noDerivatives3667"
         | "full3978"
         | "noModification3978"
         | "noDerivatives3978"
         | "trust200811"
         | "noModificationTrust200811"
         | "noDerivativesTrust200811"
         | "trust200902"
         | "noModificationTrust200902"
         | "noDerivativesTrust200902"
         | "pre5378Trust200902"
       }?,
       attribute iprExtract { xsd:IDREF }?,
       [ a:defaultValue = "IETF" ]
       attribute submissionType {
         "IETF" | "IAB" | "IRTF" | "independent"
       }?,
       attribute docName { text }?,
       [ a:defaultValue = "en" ] attribute xml:lang { text }?,
       [ a:defaultValue = "no" ] attribute sortRefs { "yes" | "no" }?,
       [ a:defaultValue = "yes" ] attribute symRefs { "yes" | "no" }?,
       [ a:defaultValue = "yes" ] attribute tocInclude { "yes" | "no"
   }?,
       [ a:defaultValue = "3" ] attribute tocDepth { text }?,
       attribute finalizedTime { text }?,
       link*,
       front,
       middle,
       back?
     }
   nlink =
     element link {
       attribute href { text },
       attribute rel { text }?
     }
   nfront =
     element front {
       title,
       author+,
       date?,
       area*,
       workgroup*,

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       keyword*,
       abstract?,
       note*,
       boilerplate?
     }
   ntitle =
     element title {
       attribute abbrev { text }?,
       attribute ascii { text }?,
       text
     }
   nauthor =
     element author {
       attribute initials { text }?,
       attribute asciiInitials { text }?,
       attribute surname { text }?,
       attribute asciiSurname { text }?,
       attribute fullname { text }?,
       attribute role { "editor" }?,
       [ a:defaultValue = "en" ] attribute xml:lang { text }?,
       attribute asciiFullname { text }?,
       organization?,
       address?
     }
   norganization =
     element organization {
       attribute abbrev { text }?,
       attribute ascii { text }?,
       text,
       [ a:defaultValue = "en" ] attribute xml:lang { text }?
     }
   naddress = element address { postal?, phone?, facsimile?, email?,
   uri? }
   npostal =
     element postal {
       [ a:defaultValue = "en" ] attribute xml:lang { text }?,
       ((city | code | country | region | street)* | postalLine+)
     }
   nstreet =
     element street {
       attribute ascii { text }?,
       text
     }
   ncity =
     element city {
       attribute ascii { text }?,
       text
     }

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   nregion =
     element region {
       attribute ascii { text }?,
       text
     }
   ncode =
     element code {
       attribute ascii { text }?,
       text
     }
   ncountry = element country { text }
   npostalLine =
     element postalLine {
       attribute ascii { text }?,
       text
     }
   nphone = element phone { text }
   nfacsimile = element facsimile { text }
   nemail =
     element email {
       attribute ascii { text }?,
       text
     }
   nuri = element uri { text }
   ndate =
     element date {
       attribute day { text }?,
       attribute month { text }?,
       attribute year { text }?,
       empty
     }
   narea = element area { text }
   nworkgroup = element workgroup { text }
   nkeyword = element keyword { text }
   nabstract =
     element abstract {
       attribute pn { text }?,
       t+
     }
   nnote =
     element note {
       attribute title { text }?,
       name,
       attribute pn { text }?,
       [ a:defaultValue = "no" ] attribute removeInRFC { "yes" | "no"
   }?,
       t+
     }

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   nboilerplate = element boilerplate { section+ }
   nmiddle = element middle { section+ }
   nsection =
     element section {
       attribute anchor { xsd:ID }?,
       attribute title { text }?,
       [ a:defaultValue = "yes" ] attribute numbered { "yes" | "no" }?,
       [ a:defaultValue = "default" ]
       attribute toc { "include" | "exclude" | "default" }?,
       [ a:defaultValue = "no" ] attribute removeInRFC { "yes" | "no"
   }?,
       attribute pn { text }?,
       name?,
       (artwork
        | aside
        | blockquote
        | dl
        | figure
        | iref
        | ol
        | sourcecode
        | t
        | table
        | texttable
        | ul)*,
       section*
     }
   nname =
     element name {
       attribute slugifiedName { text }?,
       (text | cref | eref | tt | xref)*
     }
   nt =
     element t {
       attribute anchor { xsd:ID }?,
       attribute hangText { text }?,
       attribute pn { text }?,
       (text
        | b
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | \list
        | ol
        | spanx

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        | strong
        | sub
        | sup
        | tt
        | vspace
        | xref)*
     }
   naside =
     element aside {
       attribute anchor { xsd:ID }?,
       attribute pn { text }?,
       (artwork | dl | figure | iref | \list | ol | t | table | ul)*
     }
   nblockquote =
     element blockquote {
       attribute anchor { xsd:ID }?,
       attribute pn { text }?,
       attribute cite { text }?,
       attribute quotedFrom { text }?,
       (text
        | artwork
        | b
        | bcp14
        | em
        | figure
        | i
        | sourcecode
        | strong
        | sub
        | sup
        | t
        | tt)*
     }
   n\list =
     element list {
       [ a:defaultValue = "empty" ] attribute style { text }?,
       attribute hangIndent { text }?,
       attribute counter { text }?,
       t+
     }
   nol =
     element ol {
       [ a:defaultValue = "1" ] attribute style { text }?,
       [ a:defaultValue = "1" ] attribute start { text }?,
       attribute group { text }?,
       [ a:defaultValue = "normal" ]
       attribute spacing { "normal" | "compact" }?,
       li+

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     }
   nul =
     element ul {
       [ a:defaultValue = "normal" ]
       attribute spacing { "normal" | "compact" }?,
       [ a:defaultValue = "false" ] attribute empty { "false" | "true"
   }?,
       li+
     }
   nli =
     element li {
       attribute anchor { xsd:ID }?,
       attribute pn { text }?,
       (t+
        | (text
           | b
           | bcp14
           | cref
           | em
           | eref
           | i
           | iref
           | strong
           | sub
           | sup
           | tt
           | xref)+)
     }
   ndl =
     element dl {
       [ a:defaultValue = "normal" ]
       attribute spacing { "normal" | "compact" }?,
       [ a:defaultValue = "true" ] attribute hanging { "false" | "true"
   }?,
       (dt, dd)+
     }
   ndt =
     element dt {
       attribute anchor { xsd:ID }?,
       attribute pn { text }?,
       (text
        | b
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref

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        | strong
        | sub
        | sup
        | tt
        | xref)*
     }
   ndd =
     element dd {
       t+
       | (text
          | b
          | bcp14
          | cref
          | em
          | eref
          | i
          | iref
          | strong
          | sub
          | sup
          | tt
          | xref)+
     }
   nxref =
     element xref {
       attribute target { xsd:IDREF },
       [ a:defaultValue = "false" ] attribute pageno { "true" | "false"
   }?,
       [ a:defaultValue = "default" ]
       attribute format { "counter" | "title" | "none" | "default" }?,
       (attribute section { text },
        attribute relative { text }?,
        attribute sectionFormat { text }?)?,
       text
     }
   neref =
     element eref {
       attribute target { text },
       text
     }
   niref =
     element iref {
       attribute item { text },
       [ a:defaultValue = "" ] attribute subitem { text }?,
       [ a:defaultValue = "false" ]
       attribute primary { "true" | "false" }?,
       empty
     }

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   ncref =
     element cref {
       attribute anchor { xsd:ID }?,
       attribute source { text }?,
       [ a:defaultValue = "true" ] attribute display { "true" | "false"
   }?,
       (text | b | em | eref | i | strong | sub | sup | tt | xref)*
     }
   ntt =
     element tt {
       (text
        | b
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | strong
        | sub
        | sup
        | xref)*
     }
   nb =
     element b {
       (text
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | sub
        | sup
        | tt
        | xref)*
     }
   nstrong =
     element strong {
       (text
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | sub
        | sup

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        | tt
        | xref)*
     }
   ni =
     element i {
       (text
        | b
        | bcp14
        | cref
        | eref
        | iref
        | strong
        | sub
        | sup
        | tt
        | xref)*
     }
   nem =
     element em {
       (text
        | b
        | bcp14
        | cref
        | eref
        | iref
        | strong
        | sub
        | sup
        | tt
        | xref)*
     }
   nsub =
     element sub {
       (text
        | b
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | strong
        | tt
        | xref)*
     }
   nsup =
     element sup {
       (text

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        | b
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | strong
        | tt
        | xref)*
     }
   nspanx =
     element spanx {
       [ a:defaultValue = "preserve" ]
       attribute xml:space { "default" | "preserve" }?,
       [ a:defaultValue = "emph" ] attribute style { text }?,
       text
     }
   nvspace =
     element vspace {
       [ a:defaultValue = "0" ] attribute blankLines { text }?,
       empty
     }
   nfigure =
     element figure {
       attribute anchor { xsd:ID }?,
       [ a:defaultValue = "" ] attribute title { text }?,
       [ a:defaultValue = "false" ]
       attribute suppress-title { "true" | "false" }?,
       attribute src { text }?,
       [ a:defaultValue = "left" ]
       attribute align { "left" | "center" | "right" }?,
       [ a:defaultValue = "" ] attribute alt { text }?,
       [ a:defaultValue = "" ] attribute width { text }?,
       [ a:defaultValue = "" ] attribute height { text }?,
       attribute pn { text }?,
       name?,
       iref*,
       preamble?,
       (artwork | sourcecode)+,
       postamble?
     }
   ntable =
     element table {
       attribute anchor { xsd:ID }?,
       attribute pn { text }?,
       name?,
       iref*,

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       thead?,
       tbody+,
       tfoot?
     }
   npreamble =
     element preamble {
       (text
        | b
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | spanx
        | strong
        | sub
        | sup
        | tt
        | xref)*
     }
   nartwork =
     element artwork {
       attribute xml:space { text }?,
       [ a:defaultValue = "" ] attribute name { text }?,
       [ a:defaultValue = "" ] attribute type { text }?,
       attribute src { text }?,
       [ a:defaultValue = "left" ]
       attribute align { "left" | "center" | "right" }?,
       [ a:defaultValue = "" ] attribute alt { text }?,
       [ a:defaultValue = "" ] attribute width { text }?,
       [ a:defaultValue = "" ] attribute height { text }?,
       [ a:defaultValue = "en" ] attribute xml:lang { text }?,
       attribute anchor { xsd:ID }?,
       attribute pn { text }?,
       text*
     }
   nsourcecode =
     element sourcecode {
       [ a:defaultValue = "" ] attribute name { text }?,
       [ a:defaultValue = "" ] attribute type { text }?,
       attribute src { text }?,
       attribute anchor { xsd:ID }?,
       attribute pn { text }?,
       text
     }
   nthead = element thead { tr+ }
   ntbody = element tbody { tr+ }

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   ntfoot = element tfoot { tr+ }
   ntr =
     element tr {
       [ a:defaultValue = "0" ] attribute border { text }?,
       (td, th)+
     }
   ntd =
     element td {
       [ a:defaultValue = "0" ] attribute border { text }?,
       [ a:defaultValue = "0" ] attribute colspan { text }?,
       [ a:defaultValue = "0" ] attribute rowspan { text }?,
       [ a:defaultValue = "left" ]
       attribute align { "left" | "center" | "right" }?,
       (t+
        | (text
           | artwork
           | b
           | bcp14
           | br
           | cref
           | dl
           | em
           | eref
           | figure
           | i
           | iref
           | ol
           | sourcecode
           | strong
           | sub
           | sup
           | tt
           | ul
           | xref)+)
     }
   nth =
     element th {
       [ a:defaultValue = "0" ] attribute border { text }?,
       [ a:defaultValue = "0" ] attribute colspan { text }?,
       [ a:defaultValue = "0" ] attribute rowspan { text }?,
       [ a:defaultValue = "left" ]
       attribute align { "left" | "center" | "right" }?,
       (t+
        | (text
           | artwork
           | b
           | bcp14
           | br

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           | cref
           | dl
           | em
           | eref
           | figure
           | i
           | iref
           | ol
           | sourcecode
           | strong
           | sub
           | sup
           | tt
           | ul
           | xref)+)
     }
   npostamble =
     element postamble {
       (text
        | b
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | spanx
        | strong
        | sub
        | sup
        | tt
        | xref)*
     }
   ntexttable =
     element texttable {
       attribute anchor { xsd:ID }?,
       [ a:defaultValue = "" ] attribute title { text }?,
       [ a:defaultValue = "false" ]
       attribute suppress-title { "true" | "false" }?,
       [ a:defaultValue = "center" ]
       attribute align { "left" | "center" | "right" }?,
       [ a:defaultValue = "full" ]
       attribute style { "all" | "none" | "headers" | "full" }?,
       name?,
       preamble?,
       ttcol+,
       c*,
       postamble?

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     }
   nttcol =
     element ttcol {
       attribute width { text }?,
       [ a:defaultValue = "left" ]
       attribute align { "left" | "center" | "right" }?,
       (cref | eref | iref | xref | text)*
     }
   nc =
     element c {
       (text
        | b
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | spanx
        | strong
        | sub
        | sup
        | tt
        | xref)*
     }
   nbcp14 = element bcp14 { text }
   nbr = element br { empty }
   nback = element back { displayreference*, references*, section* }
   ndisplayreference =
     element displayreference {
       attribute target { xsd:IDREF },
       attribute to { text }
     }
   nreferences =
     element references {
       attribute anchor { xsd:ID },
       name,
       (reference | referencegroup)*
     }
   nreference =
     element reference {
       attribute anchor { xsd:ID },
       attribute target { text }?,
       front,
       (annotation | format | refcontent | seriesInfo)*
     }
   nreferencegroup =
     element referencegroup {

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       attribute anchor { xsd:ID },
       reference+
     }
   nseriesInfo =
     element seriesInfo {
       attribute name { text },
       attribute value { text },
       attribute asciiname { text }?,
       attribute asciivalue { text }?,
       empty
     }
   nformat =
     element format {
       attribute target { text }?,
       attribute type { text },
       attribute octets { text }?,
       empty
     }
   nannotation =
     element annotation {
       attribute ascii { text }?,
       (text
        | b
        | bcp14
        | cref
        | em
        | eref
        | i
        | iref
        | spanx
        | strong
        | sub
        | sup
        | tt
        | xref)*
     }
   nrefcontent =
     element refcontent {
       attribute ascii { text }?,
       (text | b | bcp14 | em | i | strong | sub | sup | tt)*
     }
   nstart = rfc

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Appendix D.  Schema Differences from v2

   The following is a non-normative comparison of the v3 format to the
   v2 format.  A "-" indicates lines removed from the v2 schema, and a
   "+" indicates lines added to the v3 schema.

     namespace a =
     "http://relaxng.org/ns/compatibility/annotations/1.0"

     rfc =
       element rfc {
         attribute number { text }?,
         [ a:defaultValue = "" ] attribute obsoletes { text }?,
         [ a:defaultValue = "" ] attribute updates { text }?,
         attribute category { "std" | "bcp" | "info" | "exp" |
     "historic" }?,
         attribute consensus { "no" | "yes" }?,
         attribute seriesNo { text }?,
         attribute ipr {
           "full2026"
           | "noDerivativeWorks2026"
           | "none"
           | "full3667"
           | "noModification3667"
           | "noDerivatives3667"
           | "full3978"
           | "noModification3978"
           | "noDerivatives3978"
           | "trust200811"
           | "noModificationTrust200811"
           | "noDerivativesTrust200811"
           | "trust200902"
           | "noModificationTrust200902"
           | "noDerivativesTrust200902"
           | "pre5378Trust200902"
         }?,
         attribute iprExtract { xsd:IDREF }?,
         [ a:defaultValue = "IETF" ]
         attribute submissionType {
           "IETF" | "IAB" | "IRTF" | "independent"
         }?,
         attribute docName { text }?,
         [ a:defaultValue = "en" ] attribute xml:lang { text }?,
   +     [ a:defaultValue = "no" ] attribute sortRefs { "yes" | "no"
   + }?,
   +     [ a:defaultValue = "yes" ] attribute symRefs { "yes" | "no"
   + }?,

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   +     [ a:defaultValue = "yes" ] attribute tocInclude { "yes" |
   + "no" }?,
   +     [ a:defaultValue = "3" ] attribute tocDepth { text }?,
   +     attribute finalizedTime { text }?,
   +     link*,
         front,
         middle,
         back?
       }
   + link =
   +   element link {
   +     attribute href { text },
   +     attribute rel { text }?
   +   }
     front =
       element front {
   -     title, author+, date, area*, workgroup*, keyword*, abstract?,
   - note*
   +     title,
   +     author+,
   +     date?,
   +     area*,
   +     workgroup*,
   +     keyword*,
   +     abstract?,
   +     note*,
   +     boilerplate?
       }
     title =
       element title {
         attribute abbrev { text }?,
   +     attribute ascii { text }?,
         text
       }
     author =
       element author {
         attribute initials { text }?,
   +     attribute asciiInitials { text }?,
         attribute surname { text }?,
   +     attribute asciiSurname { text }?,
         attribute fullname { text }?,
         attribute role { "editor" }?,
   +     [ a:defaultValue = "en" ] attribute xml:lang { text }?,
   +     attribute asciiFullname { text }?,
         organization?,
         address?
       }
     organization =

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       element organization {
         attribute abbrev { text }?,
   -     text
   +     attribute ascii { text }?,
   +     text,
   +     [ a:defaultValue = "en" ] attribute xml:lang { text }?
       }
     address = element address { postal?, phone?, facsimile?, email?,
     uri? }
   - postal = element postal { street+, (city | region | code |
   - country)* }
   - street = element street { text }
   - city = element city { text }
   - region = element region { text }
   - code = element code { text }
   + postal =
   +   element postal {
   +     [ a:defaultValue = "en" ] attribute xml:lang { text }?,
   +     ((city | code | country | region | street)* | postalLine+)
   +   }
   + street =
   +   element street {
   +     attribute ascii { text }?,
   +     text
   +   }
   + city =
   +   element city {
   +     attribute ascii { text }?,
   +     text
   +   }
   + region =
   +   element region {
   +     attribute ascii { text }?,
   +     text
   +   }
   + code =
   +   element code {
   +     attribute ascii { text }?,
   +     text
   +   }
     country = element country { text }
   + postalLine =
   +   element postalLine {
   +     attribute ascii { text }?,
   +     text
   +   }
     phone = element phone { text }
     facsimile = element facsimile { text }

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   - email = element email { text }
   + email =
   +   element email {
   +     attribute ascii { text }?,
   +     text
   +   }
     uri = element uri { text }
     date =
       element date {
         attribute day { text }?,
         attribute month { text }?,
         attribute year { text }?,
         empty
       }
     area = element area { text }
     workgroup = element workgroup { text }
     keyword = element keyword { text }
   - abstract = element abstract { t+ }
   + abstract =
   +   element abstract {
   +     attribute pn { text }?,
   +     t+
   +   }
     note =
       element note {
   -     attribute title { text },
   +     attribute title { text }?,
   +     name,
   +     attribute pn { text }?,
   +     [ a:defaultValue = "no" ] attribute removeInRFC { "yes" |
   + "no" }?,
         t+
       }
   + boilerplate = element boilerplate { section+ }
     middle = element middle { section+ }
     section =
       element section {
         attribute anchor { xsd:ID }?,
   -     attribute title { text },
   +     attribute title { text }?,
   +     [ a:defaultValue = "yes" ] attribute numbered { "yes" | "no"
   + }?,
         [ a:defaultValue = "default" ]
         attribute toc { "include" | "exclude" | "default" }?,
   -     (t | figure | texttable | iref)*,
   +     [ a:defaultValue = "no" ] attribute removeInRFC { "yes" |
   + "no" }?,
   +     attribute pn { text }?,

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   +     name?,
   +     (artwork
   +      | aside
   +      | blockquote
   +      | dl
   +      | figure
   +      | iref
   +      | ol
   +      | sourcecode
   +      | t
   +      | table
   +      | texttable
   +      | ul)*,
         section*
       }
   + name =
   +   element name {
   +     attribute slugifiedName { text }?,
   +     (text | cref | eref | tt | xref)*
   +   }
     t =
       element t {
         attribute anchor { xsd:ID }?,
         attribute hangText { text }?,
   +     attribute pn { text }?,
         (text
   -      | \list
   -      | figure
   -      | xref
   +      | b
   +      | bcp14
   +      | cref
   +      | em
          | eref
   +      | i
          | iref
   -      | cref
   +      | \list
   +      | ol
          | spanx
   -      | vspace)*
   +      | strong
   +      | sub
   +      | sup
   +      | tt
   +      | vspace
   +      | xref)*
   +   }

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   + aside =
   +   element aside {
   +     attribute anchor { xsd:ID }?,
   +     attribute pn { text }?,
   +     (artwork | dl | figure | iref | \list | ol | t | table | ul)*
   +   }
   + blockquote =
   +   element blockquote {
   +     attribute anchor { xsd:ID }?,
   +     attribute pn { text }?,
   +     attribute cite { text }?,
   +     attribute quotedFrom { text }?,
   +     (text
   +      | artwork
   +      | b
   +      | bcp14
   +      | em
   +      | figure
   +      | i
   +      | sourcecode
   +      | strong
   +      | sub
   +      | sup
   +      | t
   +      | tt)*
       }
     \list =
       element list {
   -     attribute style { text }?,
   +     [ a:defaultValue = "empty" ] attribute style { text }?,
         attribute hangIndent { text }?,
         attribute counter { text }?,
         t+
       }
   + ol =
   +   element ol {
   +     [ a:defaultValue = "1" ] attribute style { text }?,
   +     [ a:defaultValue = "1" ] attribute start { text }?,
   +     attribute group { text }?,
   +     [ a:defaultValue = "normal" ]
   +     attribute spacing { "normal" | "compact" }?,
   +     li+
   +   }
   + ul =
   +   element ul {
   +     [ a:defaultValue = "normal" ]
   +     attribute spacing { "normal" | "compact" }?,
   +     [ a:defaultValue = "false" ] attribute empty { "false" |

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   + "true" }?,
   +     li+
   +   }
   + li =
   +   element li {
   +     attribute anchor { xsd:ID }?,
   +     attribute pn { text }?,
   +     (t+
   +      | (text
   +         | b
   +         | bcp14
   +         | cref
   +         | em
   +         | eref
   +         | i
   +         | iref
   +         | strong
   +         | sub
   +         | sup
   +         | tt
   +         | xref)+)
   +   }
   + dl =
   +   element dl {
   +     [ a:defaultValue = "normal" ]
   +     attribute spacing { "normal" | "compact" }?,
   +     [ a:defaultValue = "true" ] attribute hanging { "false" |
   + "true" }?,
   +     (dt, dd)+
   +   }
   + dt =
   +   element dt {
   +     attribute anchor { xsd:ID }?,
   +     attribute pn { text }?,
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | em
   +      | eref
   +      | i
   +      | iref
   +      | strong
   +      | sub
   +      | sup
   +      | tt
   +      | xref)*
   +   }

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   + dd =
   +   element dd {
   +     t+
   +     | (text
   +        | b
   +        | bcp14
   +        | cref
   +        | em
   +        | eref
   +        | i
   +        | iref
   +        | strong
   +        | sub
   +        | sup
   +        | tt
   +        | xref)+
   +   }
     xref =
       element xref {
         attribute target { xsd:IDREF },
         [ a:defaultValue = "false" ] attribute pageno { "true" |
     "false" }?,
         [ a:defaultValue = "default" ]
         attribute format { "counter" | "title" | "none" | "default"
     }?,
   +     (attribute section { text },
   +      attribute relative { text }?,
   +      attribute sectionFormat { text }?)?,
         text
       }
     eref =
       element eref {
         attribute target { text },
         text
       }
     iref =
       element iref {
         attribute item { text },
         [ a:defaultValue = "" ] attribute subitem { text }?,
         [ a:defaultValue = "false" ]
         attribute primary { "true" | "false" }?,
         empty
       }
     cref =
       element cref {
         attribute anchor { xsd:ID }?,
         attribute source { text }?,
   -     text

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   +     [ a:defaultValue = "true" ] attribute display { "true" |
   + "false" }?,
   +     (text | b | em | eref | i | strong | sub | sup | tt | xref)*
   +   }
   + tt =
   +   element tt {
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | em
   +      | eref
   +      | i
   +      | iref
   +      | strong
   +      | sub
   +      | sup
   +      | xref)*
   +   }
   + b =
   +   element b {
   +     (text
   +      | bcp14
   +      | cref
   +      | em
   +      | eref
   +      | i
   +      | iref
   +      | sub
   +      | sup
   +      | tt
   +      | xref)*
   +   }
   + strong =
   +   element strong {
   +     (text
   +      | bcp14
   +      | cref
   +      | em
   +      | eref
   +      | i
   +      | iref
   +      | sub
   +      | sup
   +      | tt
   +      | xref)*
   +   }
   + i =

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   +   element i {
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | eref
   +      | iref
   +      | strong
   +      | sub
   +      | sup
   +      | tt
   +      | xref)*
   +   }
   + em =
   +   element em {
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | eref
   +      | iref
   +      | strong
   +      | sub
   +      | sup
   +      | tt
   +      | xref)*
   +   }
   + sub =
   +   element sub {
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | em
   +      | eref
   +      | i
   +      | iref
   +      | strong
   +      | tt
   +      | xref)*
   +   }
   + sup =
   +   element sup {
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | em

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   +      | eref
   +      | i
   +      | iref
   +      | strong
   +      | tt
   +      | xref)*
       }
     spanx =
       element spanx {
         [ a:defaultValue = "preserve" ]
         attribute xml:space { "default" | "preserve" }?,
         [ a:defaultValue = "emph" ] attribute style { text }?,
         text
       }
     vspace =
       element vspace {
         [ a:defaultValue = "0" ] attribute blankLines { text }?,
         empty
       }
     figure =
       element figure {
         attribute anchor { xsd:ID }?,
         [ a:defaultValue = "" ] attribute title { text }?,
         [ a:defaultValue = "false" ]
         attribute suppress-title { "true" | "false" }?,
         attribute src { text }?,
         [ a:defaultValue = "left" ]
         attribute align { "left" | "center" | "right" }?,
         [ a:defaultValue = "" ] attribute alt { text }?,
         [ a:defaultValue = "" ] attribute width { text }?,
         [ a:defaultValue = "" ] attribute height { text }?,
   +     attribute pn { text }?,
   +     name?,
         iref*,
         preamble?,
   -     artwork,
   +     (artwork | sourcecode)+,
         postamble?
       }
   + table =
   +   element table {
   +     attribute anchor { xsd:ID }?,
   +     attribute pn { text }?,
   +     name?,
   +     iref*,
   +     thead?,
   +     tbody+,
   +     tfoot?

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   +   }
     preamble =
   -   element preamble { (text | xref | eref | iref | cref | spanx)* }
   +   element preamble {
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | em
   +      | eref
   +      | i
   +      | iref
   +      | spanx
   +      | strong
   +      | sub
   +      | sup
   +      | tt
   +      | xref)*
   +   }
     artwork =
       element artwork {
   -     [ a:defaultValue = "preserve" ]
   -     attribute xml:space { "default" | "preserve" }?,
   +     attribute xml:space { text }?,
         [ a:defaultValue = "" ] attribute name { text }?,
         [ a:defaultValue = "" ] attribute type { text }?,
         attribute src { text }?,
         [ a:defaultValue = "left" ]
         attribute align { "left" | "center" | "right" }?,
         [ a:defaultValue = "" ] attribute alt { text }?,
         [ a:defaultValue = "" ] attribute width { text }?,
         [ a:defaultValue = "" ] attribute height { text }?,
   +     [ a:defaultValue = "en" ] attribute xml:lang { text }?,
   +     attribute anchor { xsd:ID }?,
   +     attribute pn { text }?,
         text*
       }
   + sourcecode =
   +   element sourcecode {
   +     [ a:defaultValue = "" ] attribute name { text }?,
   +     [ a:defaultValue = "" ] attribute type { text }?,
   +     attribute src { text }?,
   +     attribute anchor { xsd:ID }?,
   +     attribute pn { text }?,
   +     text
   +   }
   + thead = element thead { tr+ }
   + tbody = element tbody { tr+ }

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   + tfoot = element tfoot { tr+ }
   + tr =
   +   element tr {
   +     [ a:defaultValue = "0" ] attribute border { text }?,
   +     (td, th)+
   +   }
   + td =
   +   element td {
   +     [ a:defaultValue = "0" ] attribute border { text }?,
   +     [ a:defaultValue = "0" ] attribute colspan { text }?,
   +     [ a:defaultValue = "0" ] attribute rowspan { text }?,
   +     [ a:defaultValue = "left" ]
   +     attribute align { "left" | "center" | "right" }?,
   +     (t+
   +      | (text
   +         | artwork
   +         | b
   +         | bcp14
   +         | br
   +         | cref
   +         | dl
   +         | em
   +         | eref
   +         | figure
   +         | i
   +         | iref
   +         | ol
   +         | sourcecode
   +         | strong
   +         | sub
   +         | sup
   +         | tt
   +         | ul
   +         | xref)+)
   +   }
   + th =
   +   element th {
   +     [ a:defaultValue = "0" ] attribute border { text }?,
   +     [ a:defaultValue = "0" ] attribute colspan { text }?,
   +     [ a:defaultValue = "0" ] attribute rowspan { text }?,
   +     [ a:defaultValue = "left" ]
   +     attribute align { "left" | "center" | "right" }?,
   +     (t+
   +      | (text
   +         | artwork
   +         | b
   +         | bcp14
   +         | br

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   +         | cref
   +         | dl
   +         | em
   +         | eref
   +         | figure
   +         | i
   +         | iref
   +         | ol
   +         | sourcecode
   +         | strong
   +         | sub
   +         | sup
   +         | tt
   +         | ul
   +         | xref)+)
   +   }
     postamble =
   -   element postamble { (text | xref | eref | iref | cref | spanx)*
   +   element postamble {
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | em
   +      | eref
   +      | i
   +      | iref
   +      | spanx
   +      | strong
   +      | sub
   +      | sup
   +      | tt
   +      | xref)*
     }
     texttable =
       element texttable {
         attribute anchor { xsd:ID }?,
         [ a:defaultValue = "" ] attribute title { text }?,
         [ a:defaultValue = "false" ]
         attribute suppress-title { "true" | "false" }?,
         [ a:defaultValue = "center" ]
         attribute align { "left" | "center" | "right" }?,
         [ a:defaultValue = "full" ]
         attribute style { "all" | "none" | "headers" | "full" }?,
   +     name?,
         preamble?,
         ttcol+,
         c*,

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         postamble?
       }
     ttcol =
       element ttcol {
         attribute width { text }?,
         [ a:defaultValue = "left" ]
         attribute align { "left" | "center" | "right" }?,
   -     text
   +     (cref | eref | iref | xref | text)*
   +   }
   + c =
   +   element c {
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | em
   +      | eref
   +      | i
   +      | iref
   +      | spanx
   +      | strong
   +      | sub
   +      | sup
   +      | tt
   +      | xref)*
   +   }
   + bcp14 = element bcp14 { text }
   + br = element br { empty }
   + back = element back { displayreference*, references*, section* }
   + displayreference =
   +   element displayreference {
   +     attribute target { xsd:IDREF },
   +     attribute to { text }
       }
   - c = element c { (text | xref | eref | iref | cref | spanx)* }
   - back = element back { references*, section* }
     references =
       element references {
   -     [ a:defaultValue = "References" ] attribute title { text }?,
   -     reference+
   +     attribute anchor { xsd:ID },
   +     name,
   +     (reference | referencegroup)*
       }
     reference =
       element reference {
         attribute anchor { xsd:ID },

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         attribute target { text }?,
         front,
   -     seriesInfo*,
   -     format*,
   -     annotation*
   +     (annotation | format | refcontent | seriesInfo)*
   +   }
   + referencegroup =
   +   element referencegroup {
   +     attribute anchor { xsd:ID },
   +     reference+
       }
     seriesInfo =
       element seriesInfo {
         attribute name { text },
         attribute value { text },
   +     attribute asciiname { text }?,
   +     attribute asciivalue { text }?,
         empty
       }
     format =
       element format {
         attribute target { text }?,
         attribute type { text },
         attribute octets { text }?,
         empty
       }
     annotation =
   -   element annotation { (text | xref | eref | iref | cref |
   - spanx)* }
   +   element annotation {
   +     attribute ascii { text }?,
   +     (text
   +      | b
   +      | bcp14
   +      | cref
   +      | em
   +      | eref
   +      | i
   +      | iref
   +      | spanx
   +      | strong
   +      | sub
   +      | sup
   +      | tt
   +      | xref)*
   +   }
   + refcontent =

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   +   element refcontent {
   +     attribute ascii { text }?,
   +     (text | b | bcp14 | em | i | strong | sub | sup | tt)*
   +   }
     start = rfc

Index

   A
      abbrev attribute
         in organization element  39
         in title element  64
      abstract element  10, 89
         inside front  31
         pn attribute  10
      address element  10, 89
         inside author  16
      align attribute
         in artwork element  13
         in figure element  30
         in td element  60
         in texttable element  74
         in th element  62
         in ttcol element  75
      alt attribute
         in artwork element  13
         in figure element  30
      anchor attribute
         in artwork element  14
         in aside element  16
         in blockquote element  20
         in cref element  22
         in dt element  27
         in figure element  30
         in li element  34
         in reference element  42
         in referencegroup element  43
         in references element  44
         in section element  49
         in sourcecode element  52
         in t element  58
         in table element  59
         in texttable element  74
      annotation element  11, 89
         ascii attribute  12
         inside reference  42
      application/rfc+xml Media Type  77

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      area element  12, 89
         inside front  31
      artwork element  12, 89
         align attribute  13
         alt attribute  13
         anchor attribute  14
         height attribute  14
         inside aside  15
         inside blockquote  19
         inside figure  29
         inside section  49
         inside td  59
         inside th  62
         name attribute  14
         pn attribute  14
         src attribute  14
         type attribute  14
         width attribute  15
         xml:lang attribute  15
         xml:space attribute  15
      ascii attribute
         in annotation element  12
         in city element  21
         in code element  21
         in email element  28
         in organization element  39
         in postalLine element  41
         in refcontent element  42
         in region element  44
         in street element  54
         in title element  64
      asciiFullname attribute
         in author element  17
      asciiInitials attribute
         in author element  17
      asciiname attribute
         in seriesInfo element  51
      asciiSurname attribute
         in author element  17
      asciivalue attribute
         in seriesInfo element  51
      aside element  15, 89
         anchor attribute  16
         inside section  49
         pn attribute  16
      Attributes
         abbrev  39, 64
         align  13, 30, 60, 62, 74-75

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         alt  13, 30
         anchor  14, 16, 20, 22, 27, 30, 34, 42-44, 49, 52, 58-59, 74
         ascii  12, 21, 28, 39, 41-42, 44, 54, 64
         asciiFullname  17
         asciiInitials  17
         asciiname  51
         asciiSurname  17
         asciivalue  51
         blankLines  76
         border  61, 63-64
         category  45
         cite  20
         colspan  61, 63
         consensus  45
         counter  71
         day  23
         display  22
         docName  45
         empty  65
         finalizedTime  45
         format  67
         fullname  17
         group  37
         hangIndent  71
         hanging  26
         hangText  58
         height  14, 30
         href  35
         initials  17
         ipr  46
         iprExtract  46
         item  33
         month  24
         name  14, 51-52
         number  47
         numbered  50
         obsoletes  47
         octets  71
         pageno  68
         pn  10, 14, 16, 20, 27, 30, 34, 37, 50, 53, 58-59
         primary  33
         quotedFrom  20
         rel  35
         relative  68
         removeInRFC  37, 50
         role  17
         rowspan  61, 63
         section  69

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         sectionFormat  69
         seriesNo  47
         slugifiedName  36
         sortRefs  47
         source  23
         spacing  26, 38, 66
         src  14, 30, 53
         start  38
         style  38, 71, 73, 75
         subitem  33
         submissionType  47
         suppress-title  30, 75
         surname  17
         symRefs  48
         target  25, 29, 43, 69, 71
         title  31, 37, 50, 75
         to  25
         toc  50
         tocDepth  48
         tocInclude  48
         type  14, 53, 71
         updates  48
         value  51
         width  15, 31, 76
         xml:lang  15, 17, 39-40, 48
         xml:space  15, 74
         year  24
      author element  16, 89
         asciiFullname attribute  17
         asciiInitials attribute  17
         asciiSurname attribute  17
         fullname attribute  17
         initials attribute  17
         inside front  31
         role attribute  17
         surname attribute  17
         xml:lang attribute  17

   B
      b element  17, 89
         inside annotation  11
         inside blockquote  19
         inside c  70
         inside cref  22
         inside dd  24
         inside dt  26
         inside em  28
         inside i  32

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         inside li  34
         inside postamble  72
         inside preamble  73
         inside refcontent  41
         inside sub  55
         inside sup  56
         inside t  57
         inside td  59
         inside th  62
         inside tt  65
      back element  18, 89
         inside rfc  44
      bcp14 element  19, 89
         inside annotation  11
         inside b  18
         inside blockquote  19
         inside c  70
         inside dd  24
         inside dt  27
         inside em  28
         inside i  32
         inside li  34
         inside postamble  72
         inside preamble  73
         inside refcontent  41
         inside strong  54
         inside sub  55
         inside sup  56
         inside t  57
         inside td  59
         inside th  62
         inside tt  65
      blankLines attribute
         in vspace element  76
      blockquote element  19, 89
         anchor attribute  20
         cite attribute  20
         inside section  49
         pn attribute  20
         quotedFrom attribute  20
      boilerplate element  20, 89
         inside front  31
      border attribute
         in td element  61
         in th element  63
         in tr element  64
      br element  21, 89
         inside td  59

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         inside th  62

   C
      c element  70, 89
         inside texttable  74
      category attribute
         in rfc element  45
      cite attribute
         in blockquote element  20
      city element  21, 89
         ascii attribute  21
         inside postal  40
      code element  21, 89
         ascii attribute  21
         inside postal  40
      colspan attribute
         in td element  61
         in th element  63
      consensus attribute
         in rfc element  45
      counter attribute
         in list element  71
      country element  21, 89
         inside postal  40
      cref element  21, 89
         anchor attribute  22
         display attribute  22
         inside annotation  11
         inside b  18
         inside c  70
         inside dd  24
         inside dt  27
         inside em  28
         inside i  32
         inside li  34
         inside name  36
         inside postamble  72
         inside preamble  73
         inside strong  55
         inside sub  55
         inside sup  56
         inside t  57
         inside td  60
         inside th  62
         inside tt  65
         inside ttcol  75
         source attribute  23

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   D
      date element  23, 89
         day attribute  23
         inside front  31
         month attribute  24
         year attribute  24
      day attribute
         in date element  23
      dd element  24, 89
         inside dl  26
      display attribute
         in cref element  22
      displayreference element  25, 89
         inside back  18
         target attribute  25
         to attribute  25
      dl element  25, 89
         hanging attribute  26
         inside aside  15
         inside section  49
         inside td  60
         inside th  62
         spacing attribute  26
      docName attribute
         in rfc element  45
      dt element  26, 89
         anchor attribute  27
         inside dl  26
         pn attribute  27

   E
      Elements
         abstract  10, 31
         address  10, 16
         annotation  11, 42
         area  12, 31
         artwork  12, 15, 19, 29, 49, 59, 62
         aside  15, 49
         author  16, 31
         b  11, 17, 19, 22, 24, 26, 28, 32, 34, 41, 55-57, 59, 62, 65,
            70, 72-73
         back  18, 44
         bcp14  11, 18-19, 24, 27-28, 32, 34, 41, 54-57, 59, 62, 65, 70,
            72-73
         blockquote  19, 49
         boilerplate  20, 31
         br  21, 59, 62
         c  70, 74

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         city  21, 40
         code  21, 40
         country  21, 40
         cref  11, 18, 21, 24, 27-28, 32, 34, 36, 55-57, 60, 62, 65, 70,
            72-73, 75
         date  23, 31
         dd  24, 26
         displayreference  18, 25
         dl  15, 25, 49, 60, 62
         dt  26
         em  11, 18-19, 22, 24, 27, 34, 42, 55-57, 60, 62, 65, 70, 72-73
         email  11, 28
         eref  11, 18, 22, 24, 27-28, 32, 34, 36, 55-57, 60, 62, 65, 70,
            72-73, 75
         facsimile  11, 70
         figure  15, 20, 29, 49, 60, 62
         format  42, 71
         front  31, 42, 44
         i  11, 18, 20, 22, 24, 27, 31, 34, 42, 55-57, 60, 62, 65, 70,
            72-73
         iref  11, 15, 18, 24, 27-29, 32, 34, 49, 55-58, 60, 62, 65, 70,
            72-73, 75
         keyword  31, 33
         li  33, 37, 65
         link  35, 44
         list  15, 57, 71
         middle  35, 44
         name  29, 36-37, 44, 49, 58, 74
         note  31, 36
         ol  15, 37, 49, 57, 60, 62
         organization  16, 39
         phone  11, 40
         postal  10, 40
         postalLine  40-41
         postamble  29, 72, 74
         preamble  29, 72, 74
         refcontent  41-42
         reference  42-44
         referencegroup  43-44
         references  19, 43
         region  40, 44
         rfc  44
         section  19-20, 36, 48-49
         seriesInfo  42, 51
         sourcecode  20, 29, 49, 51, 60, 62
         spanx  11, 57, 70, 72-73
         street  40, 54
         strong  11, 20, 22, 24, 27-28, 32, 34, 42, 54, 56-57, 60, 62,

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            65, 70, 72-73
         sub  11, 18, 20, 22, 24, 27-28, 32, 34, 42, 55, 57, 60, 62, 65,
            70, 72-73
         sup  11, 18, 20, 22, 25, 27-28, 32, 34, 42, 55-57, 60, 62, 65,
            70, 72-73
         t  10, 15, 20, 24, 34, 37, 49, 57, 59, 61, 71
         table  15, 49, 58
         tbody  58-59
         td  59, 64
         texttable  49, 74
         tfoot  59, 61
         th  61, 64
         thead  58, 63
         title  31, 63
         tr  59, 61, 63-64
         tt  11, 18, 20, 22, 25, 27-28, 32, 34, 36, 42, 55-58, 60, 62,
            64, 70, 72-73
         ttcol  74-75
         ul  16, 49, 60, 62, 65
         uri  11, 66
         vspace  58, 76
         workgroup  31, 66
         xref  11, 18, 22, 25, 27-28, 32, 34, 36, 55-58, 60, 62, 65-66,
            70, 72-73, 75
      em element  27, 89
         inside annotation  11
         inside b  18
         inside blockquote  19
         inside c  70
         inside cref  22
         inside dd  24
         inside dt  27
         inside li  34
         inside postamble  72
         inside preamble  73
         inside refcontent  42
         inside strong  55
         inside sub  55
         inside sup  56
         inside t  57
         inside td  60
         inside th  62
         inside tt  65
      email element  28, 89
         ascii attribute  28
         inside address  11
      empty attribute
         in ul element  65

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      eref element  28, 89
         inside annotation  11
         inside b  18
         inside c  70
         inside cref  22
         inside dd  24
         inside dt  27
         inside em  28
         inside i  32
         inside li  34
         inside name  36
         inside postamble  72
         inside preamble  73
         inside strong  55
         inside sub  56
         inside sup  56
         inside t  57
         inside td  60
         inside th  62
         inside tt  65
         inside ttcol  75
         target attribute  29

   F
      facsimile element  70, 89
         inside address  11
      figure element  29, 89
         align attribute  30
         alt attribute  30
         anchor attribute  30
         height attribute  30
         inside aside  15
         inside blockquote  20
         inside section  49
         inside td  60
         inside th  62
         pn attribute  30
         src attribute  30
         suppress-title attribute  30
         title attribute  31
         width attribute  31
      finalizedTime attribute
         in rfc element  45
      format attribute
         in xref element  67
      format element  71, 89
         inside reference  42
         octets attribute  71

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         target attribute  71
         type attribute  71
      front element  31, 89
         inside reference  42
         inside rfc  44
      fullname attribute
         in author element  17

   G
      group attribute
         in ol element  37

   H
      hangIndent attribute
         in list element  71
      hanging attribute
         in dl element  26
      hangText attribute
         in t element  58
      height attribute
         in artwork element  14
         in figure element  30
      href attribute
         in link element  35

   I
      i element  31, 89
         inside annotation  11
         inside b  18
         inside blockquote  20
         inside c  70
         inside cref  22
         inside dd  24
         inside dt  27
         inside li  34
         inside postamble  72
         inside preamble  73
         inside refcontent  42
         inside strong  55
         inside sub  56
         inside sup  56
         inside t  57
         inside td  60
         inside th  62
         inside tt  65
      initials attribute
         in author element  17
      ipr attribute

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         '*2026'  84
         '*3667'  84
         '*3978'  84
         '*trust200811'  84
         '*trust200902'  82
         'noDerivativesTrust200902'  83
         'noModificationTrust200902'  83
         'pre5378Trust200902'  83
         'trust200902'  83
         in rfc element  46
      iprExtract attribute
         in rfc element  46
      iref element  32, 89
         inside annotation  11
         inside aside  15
         inside b  18
         inside c  70
         inside dd  24
         inside dt  27
         inside em  28
         inside figure  29
         inside i  32
         inside li  34
         inside postamble  72
         inside preamble  73
         inside section  49
         inside strong  55
         inside sub  56
         inside sup  56
         inside t  57
         inside table  58
         inside td  60
         inside th  62
         inside tt  65
         inside ttcol  75
         item attribute  33
         primary attribute  33
         subitem attribute  33
      item attribute
         in iref element  33

   K
      keyword element  33, 89
         inside front  31

   L
      li element  33, 89
         anchor attribute  34

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         inside ol  37
         inside ul  65
         pn attribute  34
      link element  35, 89
         href attribute  35
         inside rfc  44
         rel attribute  35
      list element  71, 89
         counter attribute  71
         hangIndent attribute  71
         inside aside  15
         inside t  57
         style attribute  71

   M
      Media Type
         application/rfc+xml  77
      middle element  35, 89
         inside rfc  44
      month attribute
         in date element  24

   N
      name attribute
         in artwork element  14
         in seriesInfo element  51
         in sourcecode element  52
      name element  36, 89
         inside figure  29
         inside note  37
         inside references  44
         inside section  49
         inside table  58
         inside texttable  74
         slugifiedName attribute  36
      note element  36, 89
         inside front  31
         pn attribute  37
         removeInRFC attribute  37
         title attribute  37
      number attribute
         in rfc element  47
      numbered attribute
         in section element  50

   O
      obsoletes attribute
         in rfc element  47

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      octets attribute
         in format element  71
      ol element  37, 89
         group attribute  37
         inside aside  15
         inside section  49
         inside t  57
         inside td  60
         inside th  62
         spacing attribute  38
         start attribute  38
         style attribute  38
      organization element  39, 89
         abbrev attribute  39
         ascii attribute  39
         inside author  16
         xml:lang attribute  39

   P
      pageno attribute
         in xref element  68
      phone element  40, 89
         inside address  11
      pn attribute
         in abstract element  10
         in artwork element  14
         in aside element  16
         in blockquote element  20
         in dt element  27
         in figure element  30
         in li element  34
         in note element  37
         in section element  50
         in sourcecode element  53
         in t element  58
         in table element  59
      postal element  40, 89
         inside address  10
         xml:lang attribute  40
      postalLine element  41, 89
         ascii attribute  41
         inside postal  40
      postamble element  72, 89
         inside figure  29
         inside texttable  74
      preamble element  72, 89
         inside figure  29
         inside texttable  74

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      primary attribute
         in iref element  33

   Q
      quotedFrom attribute
         in blockquote element  20

   R
      refcontent element  41, 89
         ascii attribute  42
         inside reference  42
      reference element  42, 89
         anchor attribute  42
         inside referencegroup  43
         inside references  44
         target attribute  43
      referencegroup element  43, 89
         anchor attribute  43
         inside references  44
      references element  43, 89
         anchor attribute  44
         inside back  19
      region element  44, 89
         ascii attribute  44
         inside postal  40
      rel attribute
         in link element  35
      relative attribute
         in xref element  68
      removeInRFC attribute
         in note element  37
         in section element  50
      rfc element  44, 89
         category attribute  45
         consensus attribute  45
         docName attribute  45
         finalizedTime attribute  45
         ipr attribute  46
         iprExtract attribute  46
         number attribute  47
         obsoletes attribute  47
         seriesNo attribute  47
         sortRefs attribute  47
         submissionType attribute  47
         symRefs attribute  48
         tocDepth attribute  48
         tocInclude attribute  48
         updates attribute  48

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         xml:lang attribute  48
      role attribute
         in author element  17
      rowspan attribute
         in td element  61
         in th element  63

   S
      section attribute
         in xref element  69
      section element  48, 89
         anchor attribute  49
         inside back  19
         inside boilerplate  20
         inside middle  36
         inside section  49
         numbered attribute  50
         pn attribute  50
         removeInRFC attribute  50
         title attribute  50
         toc attribute  50
      sectionFormat attribute
         in xref element  69
      seriesInfo element  51, 89
         asciiname attribute  51
         asciivalue attribute  51
         inside reference  42
         name attribute  51
         value attribute  51
      seriesNo attribute
         in rfc element  47
      slugifiedName attribute
         in name element  36
      sortRefs attribute
         in rfc element  47
      source attribute
         in cref element  23
      sourcecode element  51, 89
         anchor attribute  52
         inside blockquote  20
         inside figure  29
         inside section  49
         inside td  60
         inside th  62
         name attribute  52
         pn attribute  53
         src attribute  53
         type attribute  53

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      spacing attribute
         in dl element  26
         in ol element  38
         in ul element  66
      spanx element  73, 89
         inside annotation  11
         inside c  70
         inside postamble  72
         inside preamble  73
         inside t  57
         style attribute  73
         xml:space attribute  74
      src attribute
         in artwork element  14
         in figure element  30
         in sourcecode element  53
      start attribute
         in ol element  38
      street element  54, 89
         ascii attribute  54
         inside postal  40
      strong element  54, 89
         inside annotation  11
         inside blockquote  20
         inside c  70
         inside cref  22
         inside dd  24
         inside dt  27
         inside em  28
         inside i  32
         inside li  34
         inside postamble  72
         inside preamble  73
         inside refcontent  42
         inside sub  56
         inside sup  57
         inside t  57
         inside td  60
         inside th  62
         inside tt  65
      style attribute
         in list element  71
         in ol element  38
         in spanx element  73
         in texttable element  75
      sub element  55, 89
         inside annotation  11
         inside b  18

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         inside blockquote  20
         inside c  70
         inside cref  22
         inside dd  24
         inside dt  27
         inside em  28
         inside i  32
         inside li  34
         inside postamble  72
         inside preamble  73
         inside refcontent  42
         inside strong  55
         inside t  57
         inside td  60
         inside th  62
         inside tt  65
      subitem attribute
         in iref element  33
      submissionType attribute
         in rfc element  47
      sup element  56, 89
         inside annotation  11
         inside b  18
         inside blockquote  20
         inside c  70
         inside cref  22
         inside dd  25
         inside dt  27
         inside em  28
         inside i  32
         inside li  34
         inside postamble  72
         inside preamble  73
         inside refcontent  42
         inside strong  55
         inside t  57
         inside td  60
         inside th  62
         inside tt  65
      suppress-title attribute
         in figure element  30
         in texttable element  75
      surname attribute
         in author element  17
      symRefs attribute
         in rfc element  48

   T

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      t element  57, 89
         anchor attribute  58
         hangText attribute  58
         inside abstract  10
         inside aside  15
         inside blockquote  20
         inside dd  24
         inside li  34
         inside list  71
         inside note  37
         inside section  49
         inside td  59
         inside th  61
         pn attribute  58
      table element  58, 89
         anchor attribute  59
         inside aside  15
         inside section  49
         pn attribute  59
      target attribute
         in displayreference element  25
         in eref element  29
         in format element  71
         in reference element  43
         in xref element  69
      tbody element  59, 89
         inside table  58
      td element  59, 89
         align attribute  60
         border attribute  61
         colspan attribute  61
         inside tr  64
         rowspan attribute  61
      texttable element  74, 89
         align attribute  74
         anchor attribute  74
         inside section  49
         style attribute  75
         suppress-title attribute  75
         title attribute  75
      tfoot element  61, 89
         inside table  59
      th element  61, 89
         align attribute  62
         border attribute  63
         colspan attribute  63
         inside tr  64
         rowspan attribute  63

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      thead element  63, 89
         inside table  58
      title attribute
         in figure element  31
         in note element  37
         in section element  50
         in texttable element  75
      title element  63, 89
         abbrev attribute  64
         ascii attribute  64
         inside front  31
      to attribute
         in displayreference element  25
      toc attribute
         in section element  50
      tocDepth attribute
         in rfc element  48
      tocInclude attribute
         in rfc element  48
      tr element  64, 89
         border attribute  64
         inside tbody  59
         inside tfoot  61
         inside thead  63
      tt element  64, 89
         inside annotation  11
         inside b  18
         inside blockquote  20
         inside c  70
         inside cref  22
         inside dd  25
         inside dt  27
         inside em  28
         inside i  32
         inside li  34
         inside name  36
         inside postamble  72
         inside preamble  73
         inside refcontent  42
         inside strong  55
         inside sub  56
         inside sup  57
         inside t  58
         inside td  60
         inside th  62
      ttcol element  75, 89
         align attribute  75
         inside texttable  74

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         width attribute  76
      type attribute
         in artwork element  14
         in format element  71
         in sourcecode element  53

   U
      ul element  65, 89
         empty attribute  65
         inside aside  16
         inside section  49
         inside td  60
         inside th  62
         spacing attribute  66
      updates attribute
         in rfc element  48
      uri element  66, 89
         inside address  11

   V
      value attribute
         in seriesInfo element  51
      vspace element  76, 89
         blankLines attribute  76
         inside t  58

   W
      width attribute
         in artwork element  15
         in figure element  31
         in ttcol element  76
      workgroup element  66, 89
         inside front  31

   X
      xml:lang attribute
         in artwork element  15
         in author element  17
         in organization element  39
         in postal element  40
         in rfc element  48
      xml:space attribute
         in artwork element  15
         in spanx element  74
      xref element  66, 89
         format attribute  67
         inside annotation  11
         inside b  18

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         inside c  70
         inside cref  22
         inside dd  25
         inside dt  27
         inside em  28
         inside i  32
         inside li  34
         inside name  36
         inside postamble  72
         inside preamble  73
         inside strong  55
         inside sub  56
         inside sup  57
         inside t  58
         inside td  60
         inside th  62
         inside tt  65
         inside ttcol  75
         pageno attribute  68
         relative attribute  68
         section attribute  69
         sectionFormat attribute  69
         target attribute  69
      xref formats
         counter  67
         default  67
         none  68
         title  68

   Y
      year attribute
         in date element  24

Author's Address

   Paul Hoffman
   VPN Consortium

   EMail: paul.hoffman@vpnc.org

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