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PRECIS Framework: Preparation and Comparison of Internationalized Strings in Application Protocols
draft-ietf-precis-framework-17

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft that was ultimately published as RFC 7564.
Authors Peter Saint-Andre , Marc Blanchet
Last updated 2014-07-31 (Latest revision 2014-05-27)
Replaces draft-blanchet-precis-framework
RFC stream Internet Engineering Task Force (IETF)
Formats
Reviews
Additional resources Mailing list discussion
Stream WG state Submitted to IESG for Publication
Document shepherd Alexey Melnikov
Shepherd write-up Show Last changed 2014-02-10
IESG IESG state Became RFC 7564 (Proposed Standard)
Consensus boilerplate Yes
Telechat date (None)
Responsible AD Pete Resnick
Send notices to precis-chairs@tools.ietf.org, draft-ietf-precis-framework@tools.ietf.org, precis@ietf.org
IANA IANA review state Version Changed - Review Needed
draft-ietf-precis-framework-17
Internet-Draft              PRECIS Framework                    May 2014

   AAF0..AAF1  ; FREE_PVAL   # MEETEI MAYEK CHEIKHAN..MEETEI MAYEK
   AAF2..AAF6  ; PVALID      # MEETEI MAYEK ANJI..MEETEI MAYEK VIR
   AAF7..AB00  ; UNASSIGNED  # <reserved>..<reserved>
   AB01..AB06  ; PVALID      # ETHI SYL TTHU..ETHI SYL TTHO
   AB07..AB08  ; UNASSIGNED  # <reserved>..<reserved>
   AB09..AB0E  ; PVALID      # ETHI SYL DDHAA..ETHI SYL DDHO
   AB0F..AB10  ; UNASSIGNED  # <reserved>..<reserved>
   AB11..AB16  ; PVALID      # ETHI SYL DZU..ETHI SYL DZO
   AB17..AB1F  ; UNASSIGNED  # <reserved>..<reserved>
   AB20..AB26  ; PVALID      # ETHI SYL CCHHA..ETHI SYL CCHHO
   AB27        ; UNASSIGNED  # <reserved>..<reserved>
   AB28..AB2E  ; PVALID      # ETHI SYL BBAA..ETHI SYL BBO
   AB2F..ABBF  ; UNASSIGNED  # <reserved>..<reserved>
   ABC0..ABEA  ; PVALID      # MEETEI MAYEK LET KOK..MEETEI MAYEK
   ABEB        ; FREE_PVAL   # MEETEI MAYEK CHEIKHEI
   ABEC..ABED  ; PVALID      # MEETEI MAYEK LUM IYEK..MEETEI MAYEK
   ABEE..ABEF  ; UNASSIGNED  # <reserved>..<reserved>
   ABF0..ABF9  ; PVALID      # MEETEI MAYEK DIG ZERO..MEETEI MAYEK
   ABFA..ABFF  ; UNASSIGNED  # <reserved>..<reserved>
   AC00..D7A3  ; PVALID      # <Hangul Syllable>
   D7A4..D7AF  ; UNASSIGNED  # <reserved>..<reserved>
   D7B0..D7C6  ; DISALLOWED  # HANGUL JUNG O-YEO..HANGUL JUNG ARAE
   D7C7..D7CA  ; UNASSIGNED  # <reserved>..<reserved>
   D7CB..D7FB  ; DISALLOWED  # HANGUL JONG NIEUN-RIEUL..HANGUL JON
   D7FC..D7FF  ; UNASSIGNED  # <reserved>..<reserved>
   D800..F8FF  ; DISALLOWED  # <Non Private Use High Surrogate>
   F900..FA6D  ; PVALID      # CJK COMP IDEO-F900..CJK COMP IDEO
   FA6E..FA6F  ; UNASSIGNED  # <reserved>..<reserved>
   FA70..FAD9  ; PVALID      # CJK COMP IDEO-FA70..CJK COMP IDEO
   FADA..FAFF  ; UNASSIGNED  # <reserved>..<reserved>
   FB00..FB06  ; FREE_PVAL   # LAT SM LIG FF..LAT SM LIG ST
   FB07..FB12  ; UNASSIGNED  # <reserved>..<reserved>
   FB13..FB17  ; FREE_PVAL   # ARMENIAN SM LIG MEN NOW..ARMENIAN SM
   FB18..FB1C  ; UNASSIGNED  # <reserved>..<reserved>
   FB1D..FB1F  ; PVALID      # HEBR LET YOD W HIRIQ..HEBR LIG YID Y
   FB20..FB29  ; FREE_PVAL   # HEBR LET ALT AYIN..HEB LET ALT PLUS
   FB2A..FB36  ; PVALID      # HEBR LET SHIN W SHIN DOT..HEBR LET Z
   FB37        ; UNASSIGNED  # <reserved>
   FB38..FB3C  ; PVALID      # HEBR LET TET W DAGESH..HEBR LET
   FB3D        ; UNASSIGNED  # <reserved>
   FB3E        ; PVALID      # HEBR LET MEM W DAGESH
   FB3F        ; UNASSIGNED  # <reserved>
   FB40..FB41  ; PVALID      # HEBR LET NUN W DAGESH..HEBR LET
   FB42        ; UNASSIGNED  # <reserved>
   FB43..FB44  ; PVALID      # HEBR LET FIN PE W DAGESH..HEBR L
   FB45        ; UNASSIGNED  # <reserved>
   FB46..FB4E  ; PVALID      # HEBR LET TSADI W DAGESH..HEBR LET P
   FB4F..FBC1  ; FREE_PVAL   # HEBR LIG ALEF LAMED..ARAB SYM S

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   FBC2..FBD2  ; UNASSIGNED  # <reserved>..<reserved>
   FBD3..FD3F  ; FREE_PVAL   # ARAB LET NG ISO FORM..ORNATE RIGHT
   FD40..FD4F  ; UNASSIGNED  # <reserved>..<reserved>
   FD50..FD8F  ; FREE_PVAL   # ARAB LIG TEH W JEEM W MEEM INIT
   FD90..FD91  ; UNASSIGNED  # <reserved>..<reserved>
   FD92..FDC7  ; FREE_PVAL   # ARAB LIG MEEM W JEEM W KHAH INI
   FDC8..FDCF  ; UNASSIGNED  # <reserved>..<reserved>
   FDD0..FDEF  ; DISALLOWED  # <noncharacter>..<noncharacter>
   FDF0..FDFD  ; FREE_PVAL   # ARAB LIG SALLA USED..ARAB LIG BISMI
   FDFE..FDFF  ; UNASSIGNED  # <reserved>..<reserved>
   FE00..FE0F  ; DISALLOWED  # VAR SEL-1..VAR SEL-16
   FE10..FE19  ; FREE_PVAL   # PRES FORM FOR VERT COMMA..PRES FORM
   FE1A..FE1F  ; UNASSIGNED  # <reserved>..<reserved>
   FE20..FE26  ; PVALID      # COMB LIG LEFT HALF..COMB CONJ MACRO
   FE27..FE2F  ; UNASSIGNED  # <reserved>..<reserved>
   FE30..FE52  ; FREE_PVAL   # PRES FORM FOR VERT TWO DOT LEAD..SM
   FE53        ; UNASSIGNED  # <reserved>
   FE54..FE66  ; FREE_PVAL   # SM SEMICOLON..SM EQUALS SIGN
   FE67        ; UNASSIGNED  # <reserved>
   FE68..FE6B  ; FREE_PVAL   # SM REV SOLIDUS..SM COMM AT
   FE6C..FE6F  ; UNASSIGNED  # <reserved>..<reserved>
   FE70..FE72  ; FREE_PVAL   # ARAB FATHATAN ISO FORM..ARAB DAMMAT
   FE73        ; PVALID      # ARAB TAIL FRAGMENT
   FE74        ; FREE_PVAL   # ARAB KASRATAN ISO FORM
   FE75        ; UNASSIGNED  # <reserved>
   FE76..FEFC  ; FREE_PVAL   # ARAB FATHA ISO FORM..ARAB LIG LAM W
   FEFD..FEFE  ; UNASSIGNED  # <reserved>..<reserved>
   FEFF        ; DISALLOWED  # ZERO WIDTH NO-BREAK SPACE
   FF00        ; UNASSIGNED  # <reserved>
   FF01..FF9F  ; FREE_PVAL   # FULLW EXCLAM MARK..HALFW KATA SE
   FFA0        ; DISALLOWED  # HALFW HANGUL FILLER
   FFA1..FFBE  ; FREE_PVAL   # HALFW HANGUL LET KIYEOK..HALFW H
   FFBF..FFC1  ; UNASSIGNED  # <reserved>..<reserved>
   FFC2..FFC7  ; FREE_PVAL   # HALFW HANGUL LET A..HALFW HANGUL
   FFC8..FFC9  ; UNASSIGNED  # <reserved>..<reserved>
   FFCA..FFCF  ; FREE_PVAL   # HALFW HANGUL LET YEO..HALFW HANGU
   FFD0..FFD1  ; UNASSIGNED  # <reserved>..<reserved>
   FFD2..FFD7  ; FREE_PVAL   # HALFW HANGUL LET YO..HALFW HANGUL
   FFD8..FFD9  ; UNASSIGNED  # <reserved>..<reserved>
   FFDA..FFDC  ; FREE_PVAL   # HALFW HANGUL LET EU..HALFW HANGUL
   FFDD..FFDF  ; UNASSIGNED  # <reserved>..<reserved>
   FFE0..FFE6  ; FREE_PVAL   # FULLW CENT SIGN..FULLW WON SIGN
   FFE7        ; UNASSIGNED  # <reserved>
   FFE8..FFEE  ; FREE_PVAL   # HALFW FORMS LIGHT VERT..HALFW WH
   FFEF..FFF8  ; UNASSIGNED  # <reserved>..<reserved>
   FFF9..FFFB  ; DISALLOWED  # INTERL ANNO ANCHOR..INTERL ANNO TER
   FFFC..FFFD  ; FREE_PVAL   # OBJECT REPL CHAR..REPL CHAR
   FFFE..FFFF  ; DISALLOWED  # <noncharacter>..<noncharacter>

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   10000..1000B; PVALID      # LIN B SYL B008 A..LIN B SYL
   1000C       ; UNASSIGNED  # <reserved>
   1000D..10026; PVALID      # LIN B SYL B036 JO..LIN B SYL
   10027       ; UNASSIGNED  # <reserved>
   10028..1003A; PVALID      # LIN B SYL B060 RA..LIN B SYL
   1003B       ; UNASSIGNED  # <reserved>
   1003C..1003D; PVALID      # LIN B SYL B017 ZA..LIN B SYL
   1003E       ; UNASSIGNED  # <reserved>
   1003F..1004D; PVALID      # LIN B SYL B020 ZO..LIN B SYL
   1004E..1004F; UNASSIGNED  # <reserved>..<reserved>
   10050..1005D; PVALID      # LIN B SYM B018..LIN B SYM B089
   1005E..1007F; UNASSIGNED  # <reserved>..<reserved>
   10080..100FA; PVALID      # LIN B IDEO B100 MAN..LIN B IDEO
   100FB..100FF; UNASSIGNED  # <reserved>..<reserved>
   10100..10102; FREE_PVAL   # AEG WORD SEP LINE..AEG CHECK MAR
   10103..10106; UNASSIGNED  # <reserved>..<reserved>
   10107..10133; FREE_PVAL   # AEG NUM ONE..AEG NUM NINETY THOU
   10134..10136; UNASSIGNED  # <reserved>..<reserved>
   10137..1018A; FREE_PVAL   # AEG WEIGHT BASE UNIT..GREEK ZERO SI
   1018B..1018F; UNASSIGNED  # <reserved>..<reserved>
   10190..1019B; FREE_PVAL   # ROM SEXTANS SIGN..ROM CENTURIAL SIG
   1019C..101CF; UNASSIGNED  # <reserved>..<reserved>
   101D0..101FC; FREE_PVAL   # PHAISTOS DISC SIGN PED..PHAISTOS DI
   101FD       ; PVALID      # PHAISTOS DISC SIGN COMB OBLIQUE STR
   101FE..1027F; UNASSIGNED  # <reserved>..<reserved>
   10280..1029C; PVALID      # LYCIAN LET A..LYCIAN LET X
   1029D..1029F; UNASSIGNED  # <reserved>..<reserved>
   102A0..102D0; PVALID      # CARIAN LET A..CARIAN LET UUU3
   102D1..102FF; UNASSIGNED  # <reserved>..<reserved>
   10300..1031E; PVALID      # OLD ITAL LET A..OLD ITAL LET UU
   1031F       ; UNASSIGNED  # <reserved>
   10320..10323; FREE_PVAL   # OLD ITAL NUM ONE..OLD ITAL NUM F
   10324..1032F; UNASSIGNED  # <reserved>..<reserved>
   10330..10340; PVALID      # GOTH LET AHSA..GOTH LET PAIRTHRA
   10341       ; FREE_PVAL   # GOTH LET NINETY
   10342..10349; PVALID      # GOTH LET RAIDA..GOTH LET OTHAL
   1034A       ; FREE_PVAL   # GOTH LET NINE HUNDRED
   1034B..1037F; UNASSIGNED  # <reserved>..<reserved>
   10380..1039D; PVALID      # UGAR LET ALPA..UGAR LET SSU
   1039E       ; UNASSIGNED  # <reserved>
   1039F       ; FREE_PVAL   # UGAR WORD DIVIDER
   103A0..103C3; PVALID      # OLD PERS SIGN A..OLD PERS SIGN HA
   103C4..103C7; UNASSIGNED  # <reserved>..<reserved>
   103C8..103CF; PVALID      # OLD PERS SIGN AURAMAZDAA..OLD PERS
   103D0..103D5; FREE_PVAL   # OLD PERS WORD DIVIDER..OLD PERS NUM
   103D6..103FF; UNASSIGNED  # <reserved>..<reserved>
   10400..1049D; PVALID      # DESERET CAP LET LONG I..OSMANYA LET
   1049E..1049F; UNASSIGNED  # <reserved>..<reserved>

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   104A0..104A9; PVALID      # OSMANYA DIG ZERO..OSMANYA DIG NINE
   104AA..107FF; UNASSIGNED  # <reserved>..<reserved>
   10800..10805; PVALID      # CYPRIOT SYL A..CYPRIOT SYL JA
   10806..10807; UNASSIGNED  # <reserved>..<reserved>
   10808       ; PVALID      # CYPRIOT SYL JO
   10809       ; UNASSIGNED  # <reserved>
   1080A..10835; PVALID      # CYPRIOT SYL KA..CYPRIOT SYL WO
   10836       ; UNASSIGNED  # <reserved>
   10837..10838; PVALID      # CYPRIOT SYL XA..CYPRIOT SYL XE
   10839..1083B; UNASSIGNED  # <reserved>..<reserved>
   1083C       ; PVALID      # CYPRIOT SYL ZA
   1083D..1083E; UNASSIGNED  # <reserved>..<reserved>
   1083F..10855; PVALID      # CYPRIOT SYL ZO..IMP ARAM LET TAW
   10856       ; UNASSIGNED  # <reserved>
   10857..1085F; FREE_PVAL   # IMP ARAM SECT SIGN..IMP ARAM
   10860..108FF; UNASSIGNED  # <reserved>..<reserved>
   10900..10915; PVALID      # PHOEN LET ALF..PHOEN LET TAU
   10916..1091B; FREE_PVAL   # PHOEN NUM ONE..PHOEN NUM THR
   1091C..1091E; UNASSIGNED  # <reserved>..<reserved>
   1091F       ; FREE_PVAL   # PHOEN WORD SEP
   10920..10939; PVALID      # LYDIAN LET A..LYDIAN LET C
   1093A..1093E; UNASSIGNED  # <reserved>..<reserved>
   1093F       ; FREE_PVAL   # LYDIAN TRIANGULAR MARK
   10940..1097F; UNASSIGNED  # <reserved>..<reserved>
   10980..109B7; PVALID      # MERO HIER LET A..MERO CURS LET
   109B8..109BD; UNASSIGNED  # <reserved>..<reserved>
   109BE..109BF; PVALID      # MERO CURS LOG RMT..MERO CURS L
   109C0..109FF; UNASSIGNED  # <reserved>..<reserved>
   10A00..10A03; PVALID      # KHARO LET A..KHARO VOW SIGN V
   10A04       ; UNASSIGNED  # <reserved>
   10A05..10A06; PVALID      # KHARO VOW SIGN E..KHARO VOW SI
   10A07..10A0B; UNASSIGNED  # <reserved>..<reserved>
   10A0C..10A13; PVALID      # KHARO VOW LEN MARK..KHARO LET
   10A14       ; UNASSIGNED  # <reserved>
   10A15..10A17; PVALID      # KHARO LET CA..KHARO LET JA
   10A18       ; UNASSIGNED  # <reserved>
   10A19..10A33; PVALID      # KHARO LET NYA..KHARO LET TTT
   10A34..10A37; UNASSIGNED  # <reserved>..<reserved>
   10A38..10A3A; PVALID      # KHARO SIGN BAR ABOVE..KHARO SIGN D
   10A3B..10A3E; UNASSIGNED  # <reserved>..<reserved>
   10A3F       ; PVALID      # KHARO VIRAMA
   10A40..10A47; FREE_PVAL   # KHARO DIG ONE..KHARO NUM ONE
   10A48..10A4F; UNASSIGNED  # <reserved>..<reserved>
   10A50..10A58; FREE_PVAL   # KHARO PUNCT DOT..KHARO PUNCT
   10A59..10A5F; UNASSIGNED  # <reserved>..<reserved>
   10A60..10A7C; PVALID      # OLD S ARAB LET HE..OLD SOUTH ARAB
   10A7D..10A7F; FREE_PVAL   # OLD S ARAB NUM ONE..OLD SOUTH ARAB
   10A80..10AFF; UNASSIGNED  # <reserved>..<reserved>

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   10B00..10B35; PVALID      # AVESTAN LET A..AVESTAN LET HE
   10B36..10B38; UNASSIGNED  # <reserved>..<reserved>
   10B39..10B3F; FREE_PVAL   # AVESTAN ABBR MARK..LARGE ONE RING O
   10B40..10B55; PVALID      # INSCRIPT PARTHIAN LET ALEPH..INSCRI
   10B56..10B57; UNASSIGNED  # <reserved>..<reserved>
   10B58..10B5F; FREE_PVAL   # INSCRIPT PARTHIAN NUM ONE..INSCRIPT
   10B60..10B72; PVALID      # INSCRIPT PAHLAVI LET ALEPH..INSCRIP
   10B73..10B77; UNASSIGNED  # <reserved>..<reserved>
   10B78..10B7F; FREE_PVAL   # INSCRIPT PAHLAVI NUM ONE..INSCRIPT
   10B80..10BFF; UNASSIGNED  # <reserved>..<reserved>
   10C00..10C48; PVALID      # OLD TURK LET ORKHON A..OLD TURK LET
   10C49..10E5F; UNASSIGNED  # <reserved>..<reserved>
   10E60..10E7E; FREE_PVAL   # RUMI DIG ONE..RUMI FRACTION TWO THI
   10E7F..10FFF; UNASSIGNED  # <reserved>..<reserved>
   11000..11046; PVALID      # BRAHMI SIGN CANDRABINDU..BRAHMI VIR
   11047..1104D; FREE_PVAL   # BRAHMI DANDA..BRAHMI PUNCT LOTUS
   1104E..11051; UNASSIGNED  # <reserved>..<reserved>
   11052..11065; FREE_PVAL   # BRAHMI NUM ONE..BRAHMI NUM ONE THOU
   11066..1106F; PVALID      # BRAHMI DIG ZERO..BRAHMI DIG NINE
   11070..1107F; UNASSIGNED  # <reserved>..<reserved>
   11080..110BA; PVALID      # KAITHI SIGN CANDRABINDU..KAITHI SIG
   110BB..110BC; FREE_PVAL   # KAITHI ABBR SIGN..KAITHI ENUM SIGN
   110BD       ; DISALLOWED  # KAITHI NUM SIGN
   110BE..110C1; FREE_PVAL   # KAITHI SECT MARK..KAITHI DOUBLE DAN
   110C2..110CF; UNASSIGNED  # <reserved>..<reserved>
   110D0..110F8; PVALID      # SORA SOMPENG LETTER SAH..SORA SOMPE
   110F9..110EF; UNASSIGNED  # <reserved>..<reserved>
   110F0..110F9; PVALID      # SORA SOMPENG DIG ZERO..SORA SOMPENG DI
   110FA..110FF; UNASSIGNED  # <reserved>..<reserved>
   11100..11134; PVALID      # CHAKMA SIGN CANDRABINDU..CHAKMA MAAYY
   11135       ; UNASSIGNED  # <reserved>
   11136..1113F; PVALID      # CHAKMA DIG ZERO..CHAKMA DIG NINE
   11140..11143; FREE_PVAL   # CHAKMA SECT MARK..CHAKMA QUEST MARK
   11144..1117F; UNASSIGNED  # <reserved>..<reserved>
   11180..111C4; PVALID      # SHARADA SIGN CANDRABINDU..SHARADA OM
   111C5..111C8; FREE_PVAL   # SHARADA DANDA..SHARADA SEPARATOR
   111C9..111CF; UNASSIGNED  # <reserved>..<reserved>
   111D0..111D9; PVALID      # SHARADA DIG ZERO..SHARADA DIG NINE
   111DA..1167F; UNASSIGNED  # <reserved>..<reserved>
   11680..116B7; PVALID      # TAKRI LET A..TAKRI SIGN NUKTA
   116B8..116BF; UNASSIGNED  # <reserved>..<reserved>
   116C0..116C9; PVALID      # TAKRI DIGIT ZERO..TAKRI DIG NINE
   116CA..1FFFF; UNASSIGNED  # <reserved>..<reserved>
   12000..1236E; PVALID      # CUNEI SIGN A..CUNEI SIGN ZUM
   1236F..123FF; UNASSIGNED  # <reserved>..<reserved>
   12400..12462; FREE_PVAL   # CUNEI NUM SIGN TWO ASH..CUNEI NUM
   12463..1246F; UNASSIGNED  # <reserved>..<reserved>
   12470..12473; FREE_PVAL   # CUNEI PUNCT SIGN OLD ASSYRIAN WORD

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   12474..12FFF; UNASSIGNED  # <reserved>..<reserved>
   13000..1342E; PVALID      # EGYPT HIERO A001..EGYPT HIERO AA032
   1342F..167FF; UNASSIGNED  # <reserved>..<reserved>
   16800..16A38; PVALID      # BAMUM LET PHASE-A NGKUE MFON..BAMUN LE
   16A39..16EFF; UNASSIGNED  # <reserved>..<reserved>
   16F00..16F44; PVALID      # MIAO LET PA..MIAO LET HHA
   16F45..16F4F; UNASSIGNED  # <reserved>..<reserved>
   16F50..16F7E; PVALID      # MIAO LET NAS..MIAO VOWEL SIGN NG
   16F7F..16F8E; UNASSIGNED  # <reserved>..<reserved>
   16F8F..16F9F; PVALID      # MIAO TONE RIGHT..MIAO LET REF TON
   16FA0..1AFFF; UNASSIGNED  # <reserved>..<reserved>
   1B000..1B001; PVALID      # KATA LET ARCH E..KATA LET ARCH YE
   1B002..1CFFF; UNASSIGNED  # <reserved>..<reserved>
   1D000..1D0F5; FREE_PVAL   # BYZ MUS SYM PSILI..BYZ MUS
   1D0F6..1D0FF; UNASSIGNED  # <reserved>..<reserved>
   1D100..1D126; FREE_PVAL   # MUS SYM SINGLE BARLINE..MUS SYMBOL
   1D127..1D128; UNASSIGNED  # <reserved>..<reserved>
   1D129..1D164; FREE_PVAL   # MUS SYM MULT MEASURE REST..MUS SYM ONE
   1D165..1D169; PVALID      # MUS SYM COMB STEM..MUS SYM COMB TREMOL
   1D16A..1D16C; FREE_PVAL   # MUS SYM FING TREM-1..MUS SYM FING TREM
   1D16D..1D172; PVALID      # MUS SYM COMB AUG DOT..MUS SYM COMB FL
   1D173..1D17A; DISALLOWED  # MUS SYM BEGIN BEAM..MUS SYM END PHRASE
   1D17B..1D182; PVALID      # MUS SYM COMB ACCENT..MUS SYM COMB LOUR
   1D183..1D184; FREE_PVAL   # MUS SYM ARP UP..MUS SYM ARP DOWN
   1D185..1D18B; PVALID      # MUS SYM COMB DOIT..MUS SYM COMB TRIPLE
   1D18C..1D1A9; FREE_PVAL   # MUS SYM RINFORZANDO..MUS SYM DEG SLASH
   1D1AA..1D1AD; PVALID      # MUS SYM COMB DOWN BOW..MUS SYM COMB SN
   1D1AE..1D1DD; FREE_PVAL   # MUS SYM PEDAL MARK..MUS SYM PES SUBPUN
   1D1DE..1D1FF; UNASSIGNED  # <reserved>..<reserved>
   1D200..1D241; FREE_PVAL   # GREEK VOCAL NOTATION SYM-1..GREEK INS
   1D242..1D244; FREE_PVAL   # COMB GREEK MUS TRISEME..COMB GREEK MU
   1D245       ; FREE_PVAL   # GREEK MUSICAL LEIMMA
   1D246..1D2FF; UNASSIGNED  # <reserved>..<reserved>
   1D300..1D356; DISALLOWED  # MONOG FOR EARTH..TETRAG FOR FOSTERING
   1D357..1D35F; UNASSIGNED  # <reserved>..<reserved>
   1D360..1D371; DISALLOWED  # COUNT ROD UNIT DIG ONE..COUNT ROD TE
   1D372..1D3FF; UNASSIGNED  # <reserved>..<reserved>
   1D400..1D454; FREE_PVAL   # MATH BOLD CAP A..MATH IT
   1D455       ; UNASSIGNED  # <reserved>
   1D456..1D49C; FREE_PVAL   # MATH ITAL SM I..MATH SC
   1D49D       ; UNASSIGNED  # <reserved>
   1D49E..1D49F; FREE_PVAL   # MATH SCRIPT CAP C..MATH
   1D4A0..1D4A1; UNASSIGNED  # <reserved>..<reserved>
   1D4A2       ; FREE_PVAL   # MATH SCRIPT CAP G
   1D4A3..1D4A4; UNASSIGNED  # <reserved>..<reserved>
   1D4A5..1D4A6; FREE_PVAL   # MATH SCRIPT CAP J..MATH
   1D4A7..1D4A8; UNASSIGNED  # <reserved>..<reserved>
   1D4A9..1D4AC; FREE_PVAL   # MATH SCRIPT CAP N..MATH

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   1D4AD       ; UNASSIGNED  # <reserved>
   1D4AE..1D4B9; FREE_PVAL   # MATH SCRIPT CAP S..MATH
   1D4BA       ; UNASSIGNED  # <reserved>
   1D4BB       ; FREE_PVAL   # MATH SCRIPT SM F
   1D4BC       ; UNASSIGNED  # <reserved>
   1D4BD..1D4C3; FREE_PVAL   # MATH SCRIPT SM H..MATH SC
   1D4C4       ; UNASSIGNED  # <reserved>
   1D4C5..1D505; FREE_PVAL   # MATH SCRIPT SM P..MATH FR
   1D506       ; UNASSIGNED  # <reserved>
   1D507..1D50A; FREE_PVAL   # MATH FRAKTUR CAP D..MATH
   1D50B..1D50C; UNASSIGNED  # <reserved>..<reserved>
   1D50D..1D514; FREE_PVAL   # MATH FRAKTUR CAP J..MATH
   1D515       ; UNASSIGNED  # <reserved>
   1D516..1D51C; FREE_PVAL   # MATH FRAKTUR CAP S..MATH
   1D51D       ; UNASSIGNED  # <reserved>
   1D51E..1D539; FREE_PVAL   # MATH FRAKTUR SM A..MATH D
   1D53A       ; UNASSIGNED  # <reserved>
   1D53B..1D53E; FREE_PVAL   # MATH DOUBLE-STRUCK CAP D..MATHEM
   1D53F       ; UNASSIGNED  # <reserved>
   1D540..1D544; FREE_PVAL   # MATH DOUBLE-STRUCK CAP I..MATHEM
   1D545       ; UNASSIGNED  # <reserved>
   1D546       ; FREE_PVAL   # MATH DOUBLE-STRUCK CAP O
   1D547..1D549; UNASSIGNED  # <reserved>..<reserved>
   1D54A..1D550; FREE_PVAL   # MATH DOUBLE-STRUCK CAP S..MATHEM
   1D551       ; UNASSIGNED  # <reserved>
   1D552..1D6A5; FREE_PVAL   # MATH DOUBLE-STRUCK SM A..MATHEMAT
   1D6A6..1D6A7; UNASSIGNED  # <reserved>..<reserved>
   1D6A8..1D7CB; FREE_PVAL   # MATH BOLD CAP ALPHA..MATHEMATICA
   1D7CC..1D7CD; UNASSIGNED  # <reserved>..<reserved>
   1D7CE..1D7FF; FREE_PVAL   # MATH BOLD DIG ZERO..MATH M
   1D800..1EDFF; UNASSIGNED  # <reserved>..<reserved>
   1EE00..1EE03; FREE_PVAL   # ARAB MATH ALEF..ARAB MATH DAL
   1EE04       ; UNASSIGNED  # <reserved>
   1EE05..1EE1F; FREE_PVAL   # ARAB MATH WAW..ARAB MATH DOTLESS QAF
   1EE20       ; UNASSIGNED  # <reserved>
   1EE21..1EE22; FREE_PVAL   # ARAB MATH INIT BEH..ARAB MATH INIT JEE
   1EE23       ; UNASSIGNED  # <reserved>
   1EE24       ; FREE_PVAL   # ARAB MATH INIT HEH
   1EE25..1EE26; UNASSIGNED  # <reserved>..<reserved>
   1EE27       ; FREE_PVAL   # ARAB MATH INIT HAH
   1EE28       ; UNASSIGNED  # <reserved>
   1EE29..1EE32; FREE_PVAL   # ARAB MATH INIT YEH..ARAB MATH INIT QAF
   1EE33       ; UNASSIGNED  # <reserved>
   1EE34..1EE37; FREE_PVAL   # ARAB MATH INIT SHEEN..ARAB MATH INITIA
   1EE38       ; UNASSIGNED  # <reserved>
   1EE39       ; FREE_PVAL   # ARAB MATH INIT SHEEN
   1EE3A       ; UNASSIGNED  # <reserved>
   1EE3B       ; FREE_PVAL   # ARAB MATH INIT GHAIN

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   1EE3C..1EE41; UNASSIGNED  # <reserved>..<reserved>
   1EE42       ; FREE_PVAL   # ARAB MATH TAILED JEEM
   1EE43..1EE46; UNASSIGNED  # <reserved>..<reserved>
   1EE47       ; FREE_PVAL   # ARAB MATH TAILED HAH
   1EE48       ; UNASSIGNED  # <reserved>
   1EE49       ; FREE_PVAL   # ARAB MATH TAILED YEH
   1EE4A       ; UNASSIGNED  # <reserved>
   1EE4B       ; FREE_PVAL   # ARAB MATH TAILED LAM
   1EE4C       ; UNASSIGNED  # <reserved>
   1EE4D..1EE4F; FREE_PVAL   # ARAB MATH TAILED NOON..ARAB MATH TAILE
   1EE50       ; UNASSIGNED  # <reserved>
   1EE51..1EE52; FREE_PVAL   # ARAB MATH TAILED QAF..ARAB MATH TAILED
   1EE53       ; UNASSIGNED  # <reserved>
   1EE54       ; FREE_PVAL   # ARAB MATH TAILED SHEEN
   1EE55..1EE56; UNASSIGNED  # <reserved>..<reserved>
   1EE57       ; FREE_PVAL   # ARAB MATH TAILED KHAH
   1EE58       ; UNASSIGNED  # <reserved>
   1EE59       ; FREE_PVAL   # ARAB MATH TAILED DAD
   1EE5A       ; UNASSIGNED  # <reserved>
   1EE5B       ; FREE_PVAL   # ARAB MATH TAILED GHAIN
   1EE5C       ; UNASSIGNED  # <reserved>
   1EE5D       ; FREE_PVAL   # ARAB MATH TAILED DOTLESS NOON
   1EE5E       ; UNASSIGNED  # <reserved>
   1EE5F       ; FREE_PVAL   # ARAB MATH TAILED DOTLESS GHAIN
   1EE60       ; UNASSIGNED  # <reserved>
   1EE61..1EE62; FREE_PVAL   # ARAB MATH STRETCHED BEH..ARAB MATH STR
   1EE63       ; UNASSIGNED  # <reserved>
   1EE64       ; FREE_PVAL   # ARAB MATH STRETCHED HEH
   1EE65..1EE66; UNASSIGNED  # <reserved>..<reserved>
   1EE67..1EE6A; FREE_PVAL   # ARAB MATH STRETCHED HAH..ARAB MATH STR
   1EE6B       ; UNASSIGNED  # <reserved>
   1EE6C..1EE72; FREE_PVAL   # ARAB MATH STRETCHED MEEM..ARAB MATH ST
   1EE73       ; UNASSIGNED  # <reserved>
   1EE74..1EE77; FREE_PVAL   # ARAB MATH STRETCHED SHEEN..ARAB MATH S
   1EE78       ; UNASSIGNED  # <reserved>
   1EE79..1EE7C; FREE_PVAL   # ARAB MATH STRETCHED DAD..ARAB MATH STR
   1EE7D       ; UNASSIGNED  # <reserved>
   1EE7E       ; FREE_PVAL   # ARAB MATH STRETCHED DOTLESS FEH
   1EE7F       ; UNASSIGNED  # <reserved>
   1EE80..1EE89; FREE_PVAL   # ARAB MATH LOOPED ALEF..ARAB MATH LOOPE
   1EE8A       ; UNASSIGNED  # <reserved>
   1EE8B..1EE9B; FREE_PVAL   # ARAB MATH LOOPED LAM..ARAB MATH LOOPED
   1EE9C..1EEA0; UNASSIGNED  # <reserved>..<reserved>
   1EEA1..1EEA3; FREE_PVAL   # ARAB MATH DOUBLE-STRUCK BEH..ARAB MATH
   1EEA4       ; UNASSIGNED  # <reserved>
   1EEA5..1EEA9; FREE_PVAL   # ARAB MATH DOUBLE-STRUCK WAW..ARAB MATH
   1EEAA       ; UNASSIGNED  # <reserved>
   1EEAB..1EEBB; FREE_PVAL   # ARAB MATH DOUBLE-STRUCK LAM..ARAB MATH

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   1EEBC..1EEEF; UNASSIGNED  # <reserved>..<reserved>
   1EEF0..1EEF1; FREE_PVAL   # ARAB MATH OP MEEM W HAH W TATWHEEL..AR
   1EEF2..1EFFF; UNASSIGNED  # <reserved>..<reserved>
   1F000..1F02B; FREE_PVAL   # MAHJONG TILE EAST WIND..MAHJONG TILE B
   1F02C..1F02F; UNASSIGNED  # <reserved>..<reserved>
   1F030..1F093; FREE_PVAL   # DOMINO TILE HORIZ BACK..DOMINO TILE VE
   1F094..1F09F; UNASSIGNED  # <reserved>..<reserved>
   1F0A0..1F0AE; FREE_PVAL   # PLAY CARD BACK..PLAY CARD KING OF SPAD
   1F0AF..1F0B0; UNASSIGNED  # <reserved>..<reserved>
   1F0B1..1F0BE; FREE_PVAL   # PLAY CARD ACE OF HEARTS..PLAY CARD KIN
   1F0BF..1F0C0; UNASSIGNED  # <reserved>..<reserved>
   1F0C1..1F0CF; FREE_PVAL   # PLAY CARD ACE OF DIAMONDS..PLAY CARD B
   1F0D0       ; UNASSIGNED  # <reserved>
   1F0D1..1F0DF; FREE_PVAL   # PLAY CARD ACE OF CLUBS..PLAY CARD WHIT
   1F0E0..1F0FF; UNASSIGNED  # <reserved>..<reserved>
   1F100..1F10A; FREE_PVAL   # DIG ZERO FULL STOP..DIG NINE COMMA
   1F10B..1F10F; UNASSIGNED  # <reserved>..<reserved>
   1F110..1F12E; FREE_PVAL   # PARENTHESIZED LAT CAP LET A..CIRCLE
   1F12F       ; UNASSIGNED  # <reserved>
   1F130..1F16B; FREE_PVAL   # SQUARED LAT CAP LET A..RAISED MD SIGN
   1F16C..1F16F; UNASSIGNED  # <reserved>..<reserved>
   1F170..1F19A; FREE_PVAL   # NEG SQ LAT CAP LET A..SQUARED VS
   1F19B..1F1E5; UNASSIGNED  # <reserved>..<reserved>
   1F1E6..1F202; FREE_PVAL   # REG IND SYMB LET A..SQ KATAKANA SA
   1F203..1F20F; UNASSIGNED  # <reserved>..<reserved>
   1F210..1F23A; FREE_PVAL   # SQ CJK UNIF IDEO-624B..SQ CJK UNIF IDE
   1F23B..1F23F; UNASSIGNED  # <reserved>..<reserved>
   1F240..1F248; FREE_PVAL   # TORT SH BRACK CJK UNIF IDEO-672C..TORT
   1F249..1F24F; UNASSIGNED  # <reserved>..<reserved>
   1F250..1F251; FREE_PVAL   # CIRC IDEO ADVANTAGE..CIRC IDEO ACCEPT
   1F252..1F2FF; UNASSIGNED  # <reserved>..<reserved>
   1F300..1F320; FREE_PVAL   # CYCLONE..SHOOTING STAR
   1F321..1F32F; UNASSIGNED  # <reserved>..<reserved>
   1F330..1F335; FREE_PVAL   # CHESTNUT..CACTUS
   1F336       ; UNASSIGNED  # <reserved>
   1F337..1F37C; FREE_PVAL   # TULIP..BABY BOTTLE
   1F37D..1F37F; UNASSIGNED  # <reserved>..<reserved>
   1F380..1F393; FREE_PVAL   # RIBBON..GRADUATION CAP
   1F394..1F39F; UNASSIGNED  # <reserved>..<reserved>
   1F3A0..1F3C4; FREE_PVAL   # CAROUSEL HORSE..SURFER
   1F3C5       ; UNASSIGNED  # <reserved>
   1F3C6..1F3CA; FREE_PVAL   # TROPHY..SWIMMER
   1F3CB..1F3DF; UNASSIGNED  # <reserved>..<reserved>
   1F3E0..1F3F0; FREE_PVAL   # HOUSE BUILDING..EUROPEAN CASTLE
   1F3F1..1F3FF; UNASSIGNED  # <reserved>..<reserved>
   1F400..1F43E; FREE_PVAL   # RAT..PAW PRINTS
   1F43F       ; UNASSIGNED  # <reserved>
   1F440       ; FREE_PVAL   # EYES

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   1F441       ; UNASSIGNED  # <reserved>
   1F442..1F4F7; FREE_PVAL   # EAR..CAMERA
   1F4F8       ; UNASSIGNED  # <reserved>
   1F4F9..1F4FC; FREE_PVAL   # VIDEO CAMERA..VIDEOCASSETTE
   1F4FD..1F4FF; UNASSIGNED  # <reserved>..<reserved>
   1F500..1F53D; FREE_PVAL   # TWISTED RIGHTWARDS ARROWS..DOWN-POINTI
   1F53E..1F53F; UNASSIGNED  # <reserved>..<reserved>
   1F540..1F543; FREE_PVAL   # CIRCLED CROSS POMMEE..NOTCHED LEFT SEM
   1F544..1F54F; UNASSIGNED  # <reserved>..<reserved>
   1F550..1F567; FREE_PVAL   # CLOCK FACE ONE OCLOCK..CLOCK FACE TWEL
   1F568..1F5FA; UNASSIGNED  # <reserved>..<reserved>
   1F5FB..1F640; FREE_PVAL   # MOUNT FUJI..WEARY CAT FACE
   1F641..1F644; UNASSIGNED  # <reserved>..<reserved>
   1F645..1F650; FREE_PVAL   # FACE W NO GOOD GESTURE..PERSON W FO
   1F650..1F67F; UNASSIGNED  # <reserved>..<reserved>
   1F680..1F6C5; FREE_PVAL   # ROCKET..LEFT LUGGAGE
   1F6C6..1F6FF; UNASSIGNED  # <reserved>..<reserved>
   1F700..1F773; FREE_PVAL   # ALCHEMICAL SYMBOL FOR QUINTESSENCE..AL
   1F774..1FFFF; UNASSIGNED  # <reserved>..<reserved>
   20000..2A6D6; PVALID      # <CJK Ideograph Extension B>
   2A6D7..2A6FF; UNASSIGNED  # <reserved>..<reserved>
   2A700..2B734; PVALID      # <CJK Ideograph Extension C>
   2A735..2A739; UNASSIGNED  # <reserved>..<reserved>
   2A740..2B81D; PVALID      # <CJK Ideograph Extension D>
   2B81E..2F7FF; UNASSIGNED  # <reserved>..<reserved>
   2F800..2FA1D; PVALID      # CJK COMP IDEO-2F800..CJK COMPA
   2FA1E..2FFFD; UNASSIGNED  # <reserved>..<reserved>
   2FFFE..2FFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   30000..3FFFD; UNASSIGNED  # <reserved>..<reserved>
   3FFFE..3FFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   40000..4FFFD; UNASSIGNED  # <reserved>..<reserved>
   4FFFE..4FFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   50000..5FFFD; UNASSIGNED  # <reserved>..<reserved>
   5FFFE..5FFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   60000..6FFFD; UNASSIGNED  # <reserved>..<reserved>
   6FFFE..6FFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   70000..7FFFD; UNASSIGNED  # <reserved>..<reserved>
   7FFFE..7FFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   80000..8FFFD; UNASSIGNED  # <reserved>..<reserved>
   8FFFE..8FFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   90000..9FFFD; UNASSIGNED  # <reserved>..<reserved>
   9FFFE..9FFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   A0000..AFFFD; UNASSIGNED  # <reserved>..<reserved>
   AFFFE..AFFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   B0000..BFFFD; UNASSIGNED  # <reserved>..<reserved>
   BFFFE..BFFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   C0000..CFFFD; UNASSIGNED  # <reserved>..<reserved>
   CFFFE..CFFFF; DISALLOWED  # <noncharacter>..<noncharacter>

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   D0000..DFFFD; UNASSIGNED  # <reserved>..<reserved>
   DFFFE..DFFFF; DISALLOWED  # <noncharacter>..<noncharacter>
   E0000       ; UNASSIGNED  # <reserved>
   E0001       ; DISALLOWED  # LANGUAGE TAG
   E0002..E001F; UNASSIGNED  # <reserved>..<reserved>
   E0020..E007F; DISALLOWED  # TAG SPACE..CANCEL TAG
   E0080..E00FF; UNASSIGNED  # <reserved>..<reserved>
   E0100..E01EF; DISALLOWED  # VAR SEL-17..VAR SEL-256
   E01F0..EFFFD; UNASSIGNED  # <reserved>..<reserved>
   EFFFE..10FFFF; DISALLOWED # <noncharacter>..<noncharacter>

Appendix B.  Acknowledgements

   The authors would like to acknowledge the comments and contributions
   of the following individuals during working group discussion: David
   Black, Mark Davis, Alan DeKok, Martin Duerst, Patrik Faltstrom, Ted
   Hardie, Joe Hildebrand, Bjoern Hoehrmann, Paul Hoffman, Jeffrey
   Hutzelman, Simon Josefsson, John Klensin, Alexey Melnikov, Takahiro
   Nemoto, Yoav Nir, Mike Parker, Pete Resnick, Andrew Sullivan, Dave
   Thaler, Yoshiro Yoneya, and Florian Zeitz.

   Charlie Kaufman, Tom Taylor, and Tim Wicinski reviewed the document
   on behalf of the Security Directorate, the General Area Review Team,
   and the Operations and Management Directorate, respectively.

   During IESG review, Alissa Cooper, Stephen Farrell, and Barry Leiba
   provided comments that led to further improvements.

   Some algorithms and textual descriptions have been borrowed from
   [RFC5892].  Some text regarding security has been borrowed from
   [RFC5890], [I-D.ietf-precis-saslprepbis], and
   [I-D.ietf-xmpp-6122bis].

   Peter Saint-Andre wishes to acknowledge Cisco Systems, Inc., for
   employing him during his work on earlier versions of this document.

Authors' Addresses

   Peter Saint-Andre
   &yet

   Email: ietf@stpeter.im

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   Marc Blanchet
   Viagenie
   246 Aberdeen
   Quebec, QC  G1R 2E1
   Canada

   Email: Marc.Blanchet@viagenie.ca
   URI:   http://www.viagenie.ca/

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