   <!--
     DTD for the RFC document series, draft of 99-01-30
     -->


   <!--
     Contents

       DTD data types

       The top-level

       Front matter

       The Body

       Back matter
     -->


   <!--
     DTD data types:

           entity        description
           ======        ===============================================
           NUMBER        [0-9]+
           NUMBERS       a comma-separated list of NUMBER

           DAY           the day of the month, e.g., "1"
           MONTH         the month of the year, e.g., "January"
           YEAR          a four-digit year, e.g., "1999"

           URI           e.g., "http://invisible.net/"

           ATEXT/CTEXT   printable ASCII text (no line-terminators)

           TEXT          character data
     -->


   <!ENTITY % NUMBER     "CDATA">
   <!ENTITY % NUMBERS    "CDATA">

   <!ENTITY % DAY        "CDATA">
   <!ENTITY % MONTH      "CDATA">
   <!ENTITY % YEAR       "CDATA">
   <!ENTITY % URI        "CDATA">

   <!ENTITY % ATEXT      "CDATA">
   <!ENTITY % CTEXT      "#PCDATA">

   <!ENTITY % TEXT       "#PCDATA">

   <!ENTITY   rfc.number "2629">


   <!--
     The top-level
     -->


   <!--
     attributes for the "rfc" element are supplied by the RFC
     editor. when preparing drafts, authors should leave them blank.

     the "seriesNo" attribute is used if the category is, e.g., BCP.
     -->
   <!ELEMENT rfc         (front,middle,back?)>
   <!ATTLIST rfc
             number      %NUMBER;           #IMPLIED
             obsoletes   %NUMBERS;          ""
             updates     %NUMBERS;          ""
             category    (std|bcp|info|exp|historic)
                                            "info"
             seriesNo    %NUMBER;           #IMPLIED
             ipr         (full2026|noDerivativeWorks2026|none)
                                            #IMPLIED
             docName     %ATEXT;            #IMPLIED>

   <!--
     Front matter
     -->


   <!ELEMENT front       (title,author+,date,area*,workgroup*,keyword*,
                          abstract?,note*)>

   <!-- the "abbrev" attribute is used for headers, etc. -->
   <!ELEMENT title       (%CTEXT;)>
   <!ATTLIST title
             abbrev      %ATEXT;            #IMPLIED>

   <!ELEMENT author      (organization,address?)>
   <!ATTLIST author
             initials    %ATEXT;            #IMPLIED
             surname     %ATEXT;            #IMPLIED
             fullname    %ATEXT;            #IMPLIED>

   <!ELEMENT organization
                         (%CTEXT;)>
   <!ATTLIST organization
             abbrev      %ATEXT;            #IMPLIED>

   <!ELEMENT address     (postal?,phone?,facsimile?,email?,uri?)>

   <!-- at most one of each the city, region, code, and country
        elements may be present -->
   <!ELEMENT postal      (street+,(city|region|code|country)*)>
   <!ELEMENT street      (%CTEXT;)>
   <!ELEMENT city        (%CTEXT;)>
   <!ELEMENT region      (%CTEXT;)>
   <!ELEMENT code        (%CTEXT;)>
   <!ELEMENT country     (%CTEXT;)>
   <!ELEMENT phone       (%CTEXT;)>
   <!ELEMENT facsimile   (%CTEXT;)>
   <!ELEMENT email       (%CTEXT;)>
   <!ELEMENT uri         (%CTEXT;)>

   <!ELEMENT date        EMPTY>
   <!ATTLIST date
             day         %DAY;              #IMPLIED
             month       %MONTH;            #REQUIRED
             year        %YEAR;             #REQUIRED>

   <!-- meta-data... -->
   <!ELEMENT area        (%CTEXT;)>
   <!ELEMENT workgroup   (%CTEXT;)>
   <!ELEMENT keyword     (%CTEXT;)>

   <!ELEMENT abstract    (t)+>
   <!ELEMENT note        (t)+>
   <!ATTLIST note
             title       %ATEXT;            #REQUIRED>


   <!--
     The body
     -->


   <!ELEMENT middle      (section)+>
   <!ELEMENT section     (t|figure|section)*>
   <!ATTLIST section
             anchor      ID                 #IMPLIED
             title       %ATEXT;            #REQUIRED>

   <!ELEMENT t           (%TEXT;|list|figure|xref|eref|iref|vspace)*>
   <!ATTLIST t
             hangText    %ATEXT;            #IMPLIED>

   <!-- the value of the style attribute is inherited from the closest
        parent -->
   <!ELEMENT list        (t+)>
   <!ATTLIST list
             style       (numbers|symbols|hanging|empty)
                                            "empty">

   <!ELEMENT xref        (%CTEXT;)>
   <!ATTLIST xref
             target      IDREF              #REQUIRED
             pageno      (true|false)       "false">

   <!ELEMENT eref        (%CTEXT;)>
   <!ATTLIST eref
             target      %URI;              #REQUIRED>

   <!ELEMENT iref        EMPTY>
   <!ATTLIST iref
             item        %ATEXT;            #REQUIRED
             subitem     %ATEXT;            "">

   <!ELEMENT vspace      EMPTY>
   <!ATTLIST vspace
             blankLines  %NUMBER;           "0">

   <!ELEMENT figure      (preamble?,artwork,postamble?)>
   <!ATTLIST figure
             anchor      ID                 #IMPLIED
             title       %ATEXT;            "">

   <!ELEMENT preamble    (%TEXT;|xref|eref|iref)*>
   <!ELEMENT artwork     (%TEXT;)*>
   <!ATTLIST artwork
             xml:space   (default|preserve) "preserve">
   <!ELEMENT postamble   (%TEXT;|xref|eref|iref)*>


   <!--
     Back matter
     -->

   <!-- sections, if present, are appendices -->
   <!ELEMENT back        (references?,section*)>

   <!ELEMENT references  (reference+)>
   <!ELEMENT reference   (front,seriesInfo*)>
   <!ATTLIST reference
             anchor      ID                 #IMPLIED
             target      %URI;              #IMPLIED>
   <!ELEMENT seriesInfo  EMPTY>
   <!ATTLIST seriesInfo
             name        %ATEXT;            #REQUIRED
             value       %ATEXT;            #REQUIRED>