RFML document type definition (DTD)

<!--
Record Format Markup Language (RFML) Document Type Definition.

RFML is an XML language.  Typical usage:
   <?xml version="1.0"?>
   <!DOCTYPE rfml SYSTEM "rfml.dtd">
   <rfml version="4.0">
   ...
   </rfml>


(C) Copyright IBM Corporation, 2001,2002
All rights reserved. Licensed Materials Property of IBM
US Government Users Restricted Rights
Use, duplication or disclosure restricted by
GSA ADP Schedule Contract with IBM Corp.
-->

<!-- Convenience entities -->
<!ENTITY % string             "CDATA">    <!-- a string of length 0 or greater -->
<!ENTITY % nonNegativeInteger "CDATA">    <!-- a non-negative integer -->
<!ENTITY % binary2            "CDATA">    <!-- an integer in range 0-65535 -->
<!ENTITY % boolean            "(true|false)">
<!ENTITY % datatype  "(char | int | packed | zoned | float | byte | struct)">
<!ENTITY % biditype  "(ST4 | ST5 | ST6 | ST7 | ST8 | ST9 | ST10 | ST11 | DEFAULT)">


<!-- The document root element -->
<!ELEMENT rfml (struct | recordformat)+>
<!ATTLIST rfml
          version       %string;    #FIXED "4.0"
          ccsid         %binary2;   #IMPLIED
>
<!-- Note: The ccsid is the default value that will be used for -->
     <!-- any contained <data type="char"> elements that do not specify a ccsid. -->


<!-- Note: RFML does not support nested struct declarations.  -->
<!-- All struct elements are direct children of the root node. -->
<!ELEMENT struct (data)+>
<!ATTLIST struct
          name          ID          #REQUIRED
>


<!-- <!ELEMENT recordformat (data | struct)*> -->
<!ELEMENT recordformat (data)*>
<!ATTLIST recordformat
          name          ID                    #REQUIRED
          description   %string;              #IMPLIED
>
<!-- Note: On the server, the Record "text description" field is limited to 50 bytes. -->

<!ELEMENT data EMPTY>
<!ATTLIST data
          name          %string;              #REQUIRED

          count         %nonNegativeInteger;  #IMPLIED

          type          %datatype;            #REQUIRED
          length        %nonNegativeInteger;  #IMPLIED
          precision     %nonNegativeInteger;  #IMPLIED
          ccsid         %binary2;             #IMPLIED
          init          CDATA                 #IMPLIED
          struct        IDREF                 #IMPLIED

          bidistringtype %biditype;           #IMPLIED
>
<!-- Note: The 'name' attribute must be unique within a given recordformat. -->
<!-- Note: On the server, the length of Record field names is limited to 10 bytes. -->
<!-- Note: The 'length' attribute is required, except when type="struct". -->
<!-- Note: If type="struct", then the 'struct' attribute is required. -->
<!-- Note: The 'ccsid' and 'bidistringtype' attributes are valid only when type="char". -->
<!-- Note: The 'precision' attribute is valid only for types "int", "packed", and "zoned". -->


<!-- The standard predefined character entities -->
<!ENTITY quot  "&#34;">     <!-- quotation mark -->
<!ENTITY amp   "&#38;#38;"> <!-- ampersand -->
<!ENTITY apos  "&#39;">     <!-- apostrophe -->
<!ENTITY lt    "&#38;#60;"> <!-- less than -->
<!ENTITY gt    "&#62;">     <!-- greater than -->
<!ENTITY nbsp  "&#160;">    <!-- non-breaking space -->
<!ENTITY shy   "&#173;">    <!-- soft hyphen (discretionary hyphen) -->
<!ENTITY mdash "&#38;#x2014;">
<!ENTITY ldquo "&#38;#x201C;">
<!ENTITY rdquo "&#38;#x201D;">