<!--
  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 "XXXX">


<!--
  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"
          name        %ATEXT;            ""
          type        %ATEXT;            "">

<!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>