<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<!--  This file is part of the DITA Open Toolkit project. See the accompanying LICENSE file for applicable license.  -->
<concept id="dita-13-spec-support">
  <title>DITA 1.3 support</title>
  <shortdesc><ph id="shortdesc-ph">DITA Open Toolkit <keyword keyref="release"/> provides processing support for the
      OASIS DITA 1.3 specification. Initial preview support for this specification was added in version 2.0 of the
      toolkit; version 2.2 extended this foundation to support key scopes and branch filtering along with additional
      DITA 1.3 features.</ph></shortdesc>
  <prolog>
    <metadata>
      <keywords>
        <indexterm><xmlelement>ditavalref</xmlelement></indexterm>
        <indexterm><xmlelement>xmlelement</xmlelement></indexterm>
        <indexterm><xmlelement>xmlatt</xmlelement></indexterm>
        <indexterm><xmlelement>line-through</xmlelement></indexterm>
        <indexterm><xmlelement>overline</xmlelement></indexterm>
        <indexterm><xmlelement>object</xmlelement></indexterm>
        <indexterm><xmlelement>div</xmlelement>
          <indexterm>support</indexterm></indexterm>
        <indexterm><xmlatt>keyscope</xmlatt></indexterm>
        <indexterm><xmlatt>deliveryTarget</xmlatt></indexterm>
        <indexterm><xmlatt>orient</xmlatt></indexterm>
        <indexterm><xmlatt>keyref</xmlatt></indexterm>
        <indexterm><xmlatt>cascade</xmlatt></indexterm>
        <indexterm>profiling</indexterm>
        <indexterm>filters
          <indexterm>support</indexterm></indexterm>
        <indexterm>branch filters</indexterm>
        <indexterm>DTD</indexterm>
        <indexterm>schema
          <indexterm>DITA 1.3</indexterm></indexterm>
        <indexterm>grammar files</indexterm>
        <indexterm>DITA 1.3
          <indexterm>specification support</indexterm></indexterm>
        <indexterm>catalog
          <indexterm>grammar file resolution</indexterm></indexterm>
      </keywords>
    </metadata>
  </prolog>

  <conbody>
    <p id="p">Because DITA 1.3 is fully backwards compatible with previous DITA DTDs and schemas, DITA-OT provides the
      1.3 materials as the default grammar files for processing. The XML Catalog resolution maps any references for
      unversioned DITA document types to the 1.3 versions. All processing ordinarily dependent on the 1.0, 1.1, or 1.2
      definitions continues to work as usual, and any documents that make use of the newer DITA 1.3 elements or
      attributes will be supported with specific new processing.</p>
    <section>
      <title>Major features of DITA 1.3</title>
      <p>The following DITA 1.3 features are supported in DITA Open Toolkit.</p>
      <ul>
        <li>
          <xref keyref="dita13-spec-keyscopes">Scoped keys</xref> supported using DITA 1.3 <xmlatt>keyscope</xmlatt>
          attribute</li>
        <li>
          <xref keyref="dita13-spec-branch-filter">Branch filtering</xref> using <xmlelement>ditavalref</xmlelement>
          elements in a map</li>
        <li>Support formatting based on new XML Mention elements, such as adding angle brackets around elements tagged
          with <xmlelement>xmlelement</xmlelement> and adding <codeph>@</codeph> before attributes tagged with
            <xmlelement>xmlatt</xmlelement></li>
        <li>New highlighting elements <xmlelement>line-through</xmlelement> and <xmlelement>overline</xmlelement></li>
        <li>Support for profiling based on <xmlatt>deliveryTarget</xmlatt> attribute</li>
        <li>Support for the new <xmlatt>orient</xmlatt> attribute for rotating tables</li>
        <li>Profile (filter or flag) based on
          <xref keyref="dita13-spec-profile-groups">groups within profiling attributes</xref></li>
        <li><xmlatt>keyref</xmlatt> and related key referencing attributes supported on
          <xmlelement>object</xmlelement></li>
        <li>New in-topic link syntax using <codeph>.</codeph> in place of the topic ID: <codeph>#./figure</codeph></li>
        <li>Support for additional new elements, such as the <xmlelement>div</xmlelement> element for grouping</li>
        <li>Support <xmlatt>cascade</xmlatt> attribute in maps (processing defaults to the value <codeph>merge</codeph>,
          which is the
          <xref keyref="dita13-spec-metadata-cascade-example">default cascade operation</xref> described by the DITA
          specification)</li>
      </ul>
      <note>For the latest status information on DITA 1.3-related features and fixes, see the
        <xref keyref="dita13-issues"/> in the GitHub issues tracker.</note>
    </section>
  </conbody>

  <related-links>
    <link keyref="dita13-spec-all-inclusive"/>
    <link keyref="dita13-spec-all-inclusive-pdf"/>
    <link keyref="dita13-spec-source"/>
    <link keyref="dita-tc"/>
    <link keyref="dita-adoption-tc"/>
  </related-links>
</concept>
