Representing Label Generation Rulesets using XML
draft-davies-idntables-04

>
           <ref name="meta-section"/>
         </optional>
         <ref name="data-section"/>
         <optional>
           <ref name="rules-section"/>
         </optional>
       </element>
     </define>
     <!--
       Meta section - information recorded with an label
       generation ruleset that does not affect machine processing.
     -->
     <define name="meta-section">
       <element name="meta">
         <zeroOrMore>
           <choice>
             <optional>
               <element name="version">
                 <text/>
               </element>
             </optional>
             <optional>
               <element name="date">
                 <text/>
               </element>
             </optional>
             <zeroOrMore>
               <element name="language">
                 <ref name="language-tag"/>
               </element>
             </zeroOrMore>
             <zeroOrMore>

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               <element name="domain">
                 <ref name="domain-name"/>
               </element>
             </zeroOrMore>
             <optional>
               <element name="validity-start">
                 <text/>
               </element>
             </optional>
             <optional>
               <element name="validity-end">
                 <text/>
               </element>
             </optional>
             <optional>
               <element name="unicode-version">
                 <text/>
               </element>
             </optional>
             <zeroOrMore>
               <element name="description">
                 <attribute name="type"/>
                 <text/>
               </element>
             </zeroOrMore>
             <optional>
               <element name="references">
                 <zeroOrMore>
                   <element name="reference">
                     <attribute name="id"/>
                     <text/>
                   </element>
                 </zeroOrMore>
               </element>
             </optional>
           </choice>
         </zeroOrMore>
       </element>
     </define>
     <!-- Data section - the actual code point data of the table. -->
     <define name="data-section">
       <element name="data">
         <ref name="points"/>
       </element>
     </define>
     <!-- Rules section -->
     <define name="rules-section">
       <element name="rules">

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         <zeroOrMore>
           <choice>
             <ref name="rule-declaration"/>
             <ref name="action-declaration"/>
           </choice>
         </zeroOrMore>
       </element>
     </define>
   </grammar>

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Appendix B.  Acknowledgements

   This format builds upon the work on documenting IDN tables by many
   different registry operators.  Notably, a comprehensive language
   table for Chinese, Japanese and Korean was developed by the "Joint
   Engineering Team" [RFC3743] that is the basis of many registry
   policies; and a set of guidelines for Arabic script registrations
   [RFC5564] was published by the Arabic-language community.

   Contributions that have shaped this document have been provided by
   Francisco Arias, Mark Davis, Nicholas Ostler, Thomas Roessler, Steve
   Sheng, Michel Suignard, John Yunker and Andrew Sullivan.

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Appendix C.  Editorial Notes

   This appendix to be removed prior to final publication.

C.1.  Known Issues and Future Work

   o  A method of specifying the origin URI for a table, and an
      expiration or refresh policy, as meta-data may be a useful way to
      declare how the table will be updated.

C.2.  Change History

   -00  Initial draft.

   -01  Add an XML Namespace, and fix other XML nits.  Add support for
        sequences of code points.  Improve on consistently using Unicode
        nomenclature.

   -02  Add support for validity periods.

   -03  Incorporate requirements from the Label Generation Ruleset
        Procedure for the DNS Root Zone.  These requirements include a
        detailed grammar for specifying whole-label variants, and the
        ability to explicitly declare of the actions associated with a
        specific variant.  The document also consistently applies the
        term "Label Generation Ruleset", rather than "IDN table", to
        reflect the policy term now being used to describe these.

   -04  Support reference information per [RFC3743].  Update description
        in response to feedback.  Extend the context rules to "char"
        elements and allow for inverse matching ("not-when").  Extend
        the description of label processing and implied actions, and
        allow for actions that reference disposition attributes on any
        or all variant mappings used in the generation of a variant
        label.

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Authors' Addresses

   Kim Davies
   Internet Corporation for Assigned Names and Numbers
   12025 Waterfront Drive
   Los Angeles, CA  90094
   US

   Phone: +1 310 301 5800
   Email: kim.davies@icann.org
   URI:   http://www.iana.org/

   Asmus Freytag
   ASMUS Inc.

   Email: asmus@unicode.org

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