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Content models for learning and training package
For each element in the learning and training package, this section presents the content model and a list of parent elements that can contain that element.
X elements
Content models for elements beginning with "x".

Specification URIs
Notices
Introduction to DITA 1.3
The Darwin Information Typing Architecture (DITA) specification defines a set of document types for authoring and organizing topic-oriented information, as well as a set of mechanisms for combining, extending, and constraining document types.
Architectural specification: All-inclusive edition
The architectural specification portion of the DITA specification outlines the framework of DITA. It contains an overview of DITA markup; addressing; processing; configuration, specialization, generalization, and constraints; as well as information about coding DITA grammar files.
Language reference: All-inclusive edition
The language reference portion of the DITA specification contains a topic for each DITA element. The topic defines the element, its inheritance hierarchy, and provides examples of usage. This portion of the DITA specification also includes information about DITA attributes.
Conformance
Conformance to the DITA specification allows documents and document types that are used with different processors or different versions of a processor to produce the same or similar results with little or no reimplementation or modification.
Acknowledgments
(Non-normative) Many members of the OASIS DITA Technical Committee participated in the creation of this specification and are gratefully acknowledged.
Non-normative information
This section contains non-normative information, including topics about new features in DITA 1.3 and migrating from DITA 1.2 to DITA 1.3.
Content models for learning and training package
For each element in the learning and training package, this section presents the content model and a list of parent elements that can contain that element.
- A elements
  Content models for elements beginning with "a".
- B elements
  Content models for elements beginning with "b".
- C elements
  Content models for elements beginning with "c".
- D elements
  Content models for elements beginning with "d".
- E elements
  Content models for elements beginning with "e".
- F elements
  Content models for elements beginning with "f".
- G elements
  Content models for elements beginning with "g".
- H elements
  Content models for elements beginning with "h".
- I elements
  Content models for elements beginning with "i".
- K elements
  Content models for elements beginning with "k".
- L elements
  Content models for elements beginning with "l".
- M elements
  Content models for elements beginning with "m".
- N elements
  Content models for elements beginning with "n".
- O elements
  Content models for elements beginning with "o".
- P elements
  Content models for elements beginning with "p".
- Q elements
  Content models for elements beginning with "q".
- R elements
  Content models for elements beginning with "r".
- S elements
  Content models for elements beginning with "s".
- T elements
  Content models for elements beginning with "t".
- U elements
  Content models for elements beginning with "u".
- V elements
  Content models for elements beginning with "v".
- W elements
  Content models for elements beginning with "w".
- X elements
  Content models for elements beginning with "x".
- Y elements
  Content models for elements beginning with "y".

X elements

Content models for elements beginning with "x".

Content models for `<xmlatt>`

In this document type	`<xmlatt>` contains
Bookmap, Classify map, Concept, Ditabase, General task, Glossary entry, Glossary group, Map (technical content), Reference, Task, Topic (technical content), Troubleshooting	(text data \| `<draft-comment>` \| `<required-cleanup>` \| `<text>`)*

In this document type	`<xmlatt>` is contained by
Classify map, Map (technical content)	`<alt>`, `<author>`, `<b>`, `<brand>`, `<category>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<cite>`, `<codeblock>`, `<codeph>`, `<component>`, `<consequence>`, `<coords>`, `<copyrholder>`, `<data>`, `<dd>`, `<ddhd>`, `<delim>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<dthd>`, `<entry>`, `<featnum>`, `<figgroup>`, `<filepath>`, `<fn>`, `<fragref>`, `<howtoavoid>`, `<i>`, `<index-base>`, `<index-see>`, `<index-see-also>`, `<index-sort-as>`, `<indexterm>`, `<itemgroup>`, `<keywords>`, `<li>`, `<line-through>`, `<lines>`, `<linktext>`, `<lq>`, `<msgblock>`, `<msgph>`, `<navtitle>`, `<note>`, `<oper>`, `<overline>`, `<p>`, `<pd>`, `<ph>`, `<platform>`, `<pre>`, `<prodname>`, `<prognum>`, `<pt>`, `<publisher>`, `<q>`, `<repsep>`, `<screen>`, `<searchtitle>`, `<sep>`, `<series>`, `<shortdesc>`, `<sli>`, `<sort-as>`, `<source>`, `<stentry>`, `<sub>`, `<sup>`, `<synnote>`, `<systemoutput>`, `<title>`, `<tt>`, `<typeofhazard>`, `<u>`, `<uicontrol>`, `<userinput>`, `<var>`, `<xref>`
Concept, Topic (technical content)	`<abstract>`, `<alt>`, `<author>`, `<b>`, `<bodydiv>`, `<brand>`, `<category>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<cite>`, `<codeblock>`, `<codeph>`, `<component>`, `<consequence>`, `<coords>`, `<copyrholder>`, `<data>`, `<dd>`, `<ddhd>`, `<delim>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<dthd>`, `<entry>`, `<equation-block>`, `<equation-inline>`, `<example>`, `<featnum>`, `<figgroup>`, `<filepath>`, `<fn>`, `<fragref>`, `<howtoavoid>`, `<i>`, `<index-base>`, `<index-see>`, `<index-see-also>`, `<index-sort-as>`, `<indexterm>`, `<itemgroup>`, `<keywords>`, `<li>`, `<line-through>`, `<lines>`, `<linkinfo>`, `<linktext>`, `<lq>`, `<msgblock>`, `<msgph>`, `<navtitle>`, `<note>`, `<oper>`, `<overline>`, `<p>`, `<pd>`, `<ph>`, `<platform>`, `<pre>`, `<prodname>`, `<prognum>`, `<pt>`, `<publisher>`, `<q>`, `<repsep>`, `<screen>`, `<searchtitle>`, `<section>`, `<sectiondiv>`, `<sep>`, `<series>`, `<shortdesc>`, `<sli>`, `<sort-as>`, `<source>`, `<stentry>`, `<sub>`, `<sup>`, `<synnote>`, `<systemoutput>`, `<title>`, `<tt>`, `<typeofhazard>`, `<u>`, `<uicontrol>`, `<userinput>`, `<var>`, `<xref>`
Bookmap	Everything in Map (technical content), plus: `<addressdetails>`, `<administrativearea>`, `<booklibrary>`, `<booknumber>`, `<bookpartno>`, `<booktitlealt>`, `<contactnumber>`, `<country>`, `<day>`, `<edition>`, `<emailaddress>`, `<firstname>`, `<generationidentifier>`, `<honorific>`, `<isbn>`, `<lastname>`, `<locality>`, `<localityname>`, `<mainbooktitle>`, `<middlename>`, `<month>`, `<organization>`, `<organizationname>`, `<otherinfo>`, `<person>`, `<postalcode>`, `<printlocation>`, `<revisionid>`, `<summary>`, `<thoroughfare>`, `<url>`, `<volume>`, `<year>`
Ditabase	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<glossAbbreviation>`, `<glossAcronym>`, `<glossProperty>`, `<glossScopeNote>`, `<glossShortForm>`, `<glossSurfaceForm>`, `<glossSynonym>`, `<glossUsage>`, `<glossdef>`, `<glossterm>`, `<info>`, `<postreq>`, `<prereq>`, `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`, `<responsibleParty>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
General task, Task	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<info>`, `<postreq>`, `<prereq>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
Glossary entry, Glossary group	Everything in Topic (technical content), plus: `<glossAbbreviation>`, `<glossAcronym>`, `<glossProperty>`, `<glossScopeNote>`, `<glossShortForm>`, `<glossSurfaceForm>`, `<glossSynonym>`, `<glossUsage>`, `<glossdef>`, `<glossterm>`
Reference	Everything in Topic (technical content), plus: `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`
Troubleshooting	Everything in Task, plus: `<responsibleParty>`

Content models for `<xmlelement>`

In this document type	`<xmlelement>` contains
Bookmap, Classify map, Concept, Ditabase, General task, Glossary entry, Glossary group, Map (technical content), Reference, Task, Topic (technical content), Troubleshooting	(text data \| `<draft-comment>` \| `<required-cleanup>` \| `<text>`)*

In this document type	`<xmlelement>` is contained by
Classify map, Map (technical content)	`<alt>`, `<author>`, `<b>`, `<brand>`, `<category>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<cite>`, `<codeblock>`, `<codeph>`, `<component>`, `<consequence>`, `<coords>`, `<copyrholder>`, `<data>`, `<dd>`, `<ddhd>`, `<delim>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<dthd>`, `<entry>`, `<featnum>`, `<figgroup>`, `<filepath>`, `<fn>`, `<fragref>`, `<howtoavoid>`, `<i>`, `<index-base>`, `<index-see>`, `<index-see-also>`, `<index-sort-as>`, `<indexterm>`, `<itemgroup>`, `<keywords>`, `<li>`, `<line-through>`, `<lines>`, `<linktext>`, `<lq>`, `<msgblock>`, `<msgph>`, `<navtitle>`, `<note>`, `<oper>`, `<overline>`, `<p>`, `<pd>`, `<ph>`, `<platform>`, `<pre>`, `<prodname>`, `<prognum>`, `<pt>`, `<publisher>`, `<q>`, `<repsep>`, `<screen>`, `<searchtitle>`, `<sep>`, `<series>`, `<shortdesc>`, `<sli>`, `<sort-as>`, `<source>`, `<stentry>`, `<sub>`, `<sup>`, `<synnote>`, `<systemoutput>`, `<title>`, `<tt>`, `<typeofhazard>`, `<u>`, `<uicontrol>`, `<userinput>`, `<var>`, `<xref>`
Concept, Topic (technical content)	`<abstract>`, `<alt>`, `<author>`, `<b>`, `<bodydiv>`, `<brand>`, `<category>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<cite>`, `<codeblock>`, `<codeph>`, `<component>`, `<consequence>`, `<coords>`, `<copyrholder>`, `<data>`, `<dd>`, `<ddhd>`, `<delim>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<dthd>`, `<entry>`, `<equation-block>`, `<equation-inline>`, `<example>`, `<featnum>`, `<figgroup>`, `<filepath>`, `<fn>`, `<fragref>`, `<howtoavoid>`, `<i>`, `<index-base>`, `<index-see>`, `<index-see-also>`, `<index-sort-as>`, `<indexterm>`, `<itemgroup>`, `<keywords>`, `<li>`, `<line-through>`, `<lines>`, `<linkinfo>`, `<linktext>`, `<lq>`, `<msgblock>`, `<msgph>`, `<navtitle>`, `<note>`, `<oper>`, `<overline>`, `<p>`, `<pd>`, `<ph>`, `<platform>`, `<pre>`, `<prodname>`, `<prognum>`, `<pt>`, `<publisher>`, `<q>`, `<repsep>`, `<screen>`, `<searchtitle>`, `<section>`, `<sectiondiv>`, `<sep>`, `<series>`, `<shortdesc>`, `<sli>`, `<sort-as>`, `<source>`, `<stentry>`, `<sub>`, `<sup>`, `<synnote>`, `<systemoutput>`, `<title>`, `<tt>`, `<typeofhazard>`, `<u>`, `<uicontrol>`, `<userinput>`, `<var>`, `<xref>`
Bookmap	Everything in Map (technical content), plus: `<addressdetails>`, `<administrativearea>`, `<booklibrary>`, `<booknumber>`, `<bookpartno>`, `<booktitlealt>`, `<contactnumber>`, `<country>`, `<day>`, `<edition>`, `<emailaddress>`, `<firstname>`, `<generationidentifier>`, `<honorific>`, `<isbn>`, `<lastname>`, `<locality>`, `<localityname>`, `<mainbooktitle>`, `<middlename>`, `<month>`, `<organization>`, `<organizationname>`, `<otherinfo>`, `<person>`, `<postalcode>`, `<printlocation>`, `<revisionid>`, `<summary>`, `<thoroughfare>`, `<url>`, `<volume>`, `<year>`
Ditabase	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<glossAbbreviation>`, `<glossAcronym>`, `<glossProperty>`, `<glossScopeNote>`, `<glossShortForm>`, `<glossSurfaceForm>`, `<glossSynonym>`, `<glossUsage>`, `<glossdef>`, `<glossterm>`, `<info>`, `<postreq>`, `<prereq>`, `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`, `<responsibleParty>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
General task, Task	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<info>`, `<postreq>`, `<prereq>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
Glossary entry, Glossary group	Everything in Topic (technical content), plus: `<glossAbbreviation>`, `<glossAcronym>`, `<glossProperty>`, `<glossScopeNote>`, `<glossShortForm>`, `<glossSurfaceForm>`, `<glossSynonym>`, `<glossUsage>`, `<glossdef>`, `<glossterm>`
Reference	Everything in Topic (technical content), plus: `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`
Troubleshooting	Everything in Task, plus: `<responsibleParty>`

Content models for `<xmlnsname>`

In this document type	`<xmlnsname>` contains
Bookmap, Classify map, Concept, Ditabase, General task, Glossary entry, Glossary group, Map (technical content), Reference, Task, Topic (technical content), Troubleshooting	(text data \| `<draft-comment>` \| `<required-cleanup>` \| `<text>`)*

In this document type	`<xmlnsname>` is contained by
Classify map, Map (technical content)	`<alt>`, `<author>`, `<b>`, `<brand>`, `<category>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<cite>`, `<codeblock>`, `<codeph>`, `<component>`, `<consequence>`, `<coords>`, `<copyrholder>`, `<data>`, `<dd>`, `<ddhd>`, `<delim>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<dthd>`, `<entry>`, `<featnum>`, `<figgroup>`, `<filepath>`, `<fn>`, `<fragref>`, `<howtoavoid>`, `<i>`, `<index-base>`, `<index-see>`, `<index-see-also>`, `<index-sort-as>`, `<indexterm>`, `<itemgroup>`, `<keywords>`, `<li>`, `<line-through>`, `<lines>`, `<linktext>`, `<lq>`, `<msgblock>`, `<msgph>`, `<navtitle>`, `<note>`, `<oper>`, `<overline>`, `<p>`, `<pd>`, `<ph>`, `<platform>`, `<pre>`, `<prodname>`, `<prognum>`, `<pt>`, `<publisher>`, `<q>`, `<repsep>`, `<screen>`, `<searchtitle>`, `<sep>`, `<series>`, `<shortdesc>`, `<sli>`, `<sort-as>`, `<source>`, `<stentry>`, `<sub>`, `<sup>`, `<synnote>`, `<systemoutput>`, `<title>`, `<tt>`, `<typeofhazard>`, `<u>`, `<uicontrol>`, `<userinput>`, `<var>`, `<xref>`
Concept, Topic (technical content)	`<abstract>`, `<alt>`, `<author>`, `<b>`, `<bodydiv>`, `<brand>`, `<category>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<cite>`, `<codeblock>`, `<codeph>`, `<component>`, `<consequence>`, `<coords>`, `<copyrholder>`, `<data>`, `<dd>`, `<ddhd>`, `<delim>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<dthd>`, `<entry>`, `<equation-block>`, `<equation-inline>`, `<example>`, `<featnum>`, `<figgroup>`, `<filepath>`, `<fn>`, `<fragref>`, `<howtoavoid>`, `<i>`, `<index-base>`, `<index-see>`, `<index-see-also>`, `<index-sort-as>`, `<indexterm>`, `<itemgroup>`, `<keywords>`, `<li>`, `<line-through>`, `<lines>`, `<linkinfo>`, `<linktext>`, `<lq>`, `<msgblock>`, `<msgph>`, `<navtitle>`, `<note>`, `<oper>`, `<overline>`, `<p>`, `<pd>`, `<ph>`, `<platform>`, `<pre>`, `<prodname>`, `<prognum>`, `<pt>`, `<publisher>`, `<q>`, `<repsep>`, `<screen>`, `<searchtitle>`, `<section>`, `<sectiondiv>`, `<sep>`, `<series>`, `<shortdesc>`, `<sli>`, `<sort-as>`, `<source>`, `<stentry>`, `<sub>`, `<sup>`, `<synnote>`, `<systemoutput>`, `<title>`, `<tt>`, `<typeofhazard>`, `<u>`, `<uicontrol>`, `<userinput>`, `<var>`, `<xref>`
Bookmap	Everything in Map (technical content), plus: `<addressdetails>`, `<administrativearea>`, `<booklibrary>`, `<booknumber>`, `<bookpartno>`, `<booktitlealt>`, `<contactnumber>`, `<country>`, `<day>`, `<edition>`, `<emailaddress>`, `<firstname>`, `<generationidentifier>`, `<honorific>`, `<isbn>`, `<lastname>`, `<locality>`, `<localityname>`, `<mainbooktitle>`, `<middlename>`, `<month>`, `<organization>`, `<organizationname>`, `<otherinfo>`, `<person>`, `<postalcode>`, `<printlocation>`, `<revisionid>`, `<summary>`, `<thoroughfare>`, `<url>`, `<volume>`, `<year>`
Ditabase	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<glossAbbreviation>`, `<glossAcronym>`, `<glossProperty>`, `<glossScopeNote>`, `<glossShortForm>`, `<glossSurfaceForm>`, `<glossSynonym>`, `<glossUsage>`, `<glossdef>`, `<glossterm>`, `<info>`, `<postreq>`, `<prereq>`, `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`, `<responsibleParty>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
General task, Task	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<info>`, `<postreq>`, `<prereq>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
Glossary entry, Glossary group	Everything in Topic (technical content), plus: `<glossAbbreviation>`, `<glossAcronym>`, `<glossProperty>`, `<glossScopeNote>`, `<glossShortForm>`, `<glossSurfaceForm>`, `<glossSynonym>`, `<glossUsage>`, `<glossdef>`, `<glossterm>`
Reference	Everything in Topic (technical content), plus: `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`
Troubleshooting	Everything in Task, plus: `<responsibleParty>`

Content models for `<xmlpi>`

In this document type	`<xmlpi>` contains
Bookmap, Classify map, Concept, Ditabase, General task, Glossary entry, Glossary group, Map (technical content), Reference, Task, Topic (technical content), Troubleshooting	(text data \| `<draft-comment>` \| `<required-cleanup>` \| `<text>`)*

In this document type	`<xmlpi>` is contained by
Classify map, Map (technical content)	`<alt>`, `<author>`, `<b>`, `<brand>`, `<category>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<cite>`, `<codeblock>`, `<codeph>`, `<component>`, `<consequence>`, `<coords>`, `<copyrholder>`, `<data>`, `<dd>`, `<ddhd>`, `<delim>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<dthd>`, `<entry>`, `<featnum>`, `<figgroup>`, `<filepath>`, `<fn>`, `<fragref>`, `<howtoavoid>`, `<i>`, `<index-base>`, `<index-see>`, `<index-see-also>`, `<index-sort-as>`, `<indexterm>`, `<itemgroup>`, `<keywords>`, `<li>`, `<line-through>`, `<lines>`, `<linktext>`, `<lq>`, `<msgblock>`, `<msgph>`, `<navtitle>`, `<note>`, `<oper>`, `<overline>`, `<p>`, `<pd>`, `<ph>`, `<platform>`, `<pre>`, `<prodname>`, `<prognum>`, `<pt>`, `<publisher>`, `<q>`, `<repsep>`, `<screen>`, `<searchtitle>`, `<sep>`, `<series>`, `<shortdesc>`, `<sli>`, `<sort-as>`, `<source>`, `<stentry>`, `<sub>`, `<sup>`, `<synnote>`, `<systemoutput>`, `<title>`, `<tt>`, `<typeofhazard>`, `<u>`, `<uicontrol>`, `<userinput>`, `<var>`, `<xref>`
Concept, Topic (technical content)	`<abstract>`, `<alt>`, `<author>`, `<b>`, `<bodydiv>`, `<brand>`, `<category>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<cite>`, `<codeblock>`, `<codeph>`, `<component>`, `<consequence>`, `<coords>`, `<copyrholder>`, `<data>`, `<dd>`, `<ddhd>`, `<delim>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<dthd>`, `<entry>`, `<equation-block>`, `<equation-inline>`, `<example>`, `<featnum>`, `<figgroup>`, `<filepath>`, `<fn>`, `<fragref>`, `<howtoavoid>`, `<i>`, `<index-base>`, `<index-see>`, `<index-see-also>`, `<index-sort-as>`, `<indexterm>`, `<itemgroup>`, `<keywords>`, `<li>`, `<line-through>`, `<lines>`, `<linkinfo>`, `<linktext>`, `<lq>`, `<msgblock>`, `<msgph>`, `<navtitle>`, `<note>`, `<oper>`, `<overline>`, `<p>`, `<pd>`, `<ph>`, `<platform>`, `<pre>`, `<prodname>`, `<prognum>`, `<pt>`, `<publisher>`, `<q>`, `<repsep>`, `<screen>`, `<searchtitle>`, `<section>`, `<sectiondiv>`, `<sep>`, `<series>`, `<shortdesc>`, `<sli>`, `<sort-as>`, `<source>`, `<stentry>`, `<sub>`, `<sup>`, `<synnote>`, `<systemoutput>`, `<title>`, `<tt>`, `<typeofhazard>`, `<u>`, `<uicontrol>`, `<userinput>`, `<var>`, `<xref>`
Bookmap	Everything in Map (technical content), plus: `<addressdetails>`, `<administrativearea>`, `<booklibrary>`, `<booknumber>`, `<bookpartno>`, `<booktitlealt>`, `<contactnumber>`, `<country>`, `<day>`, `<edition>`, `<emailaddress>`, `<firstname>`, `<generationidentifier>`, `<honorific>`, `<isbn>`, `<lastname>`, `<locality>`, `<localityname>`, `<mainbooktitle>`, `<middlename>`, `<month>`, `<organization>`, `<organizationname>`, `<otherinfo>`, `<person>`, `<postalcode>`, `<printlocation>`, `<revisionid>`, `<summary>`, `<thoroughfare>`, `<url>`, `<volume>`, `<year>`
Ditabase	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<glossAbbreviation>`, `<glossAcronym>`, `<glossProperty>`, `<glossScopeNote>`, `<glossShortForm>`, `<glossSurfaceForm>`, `<glossSynonym>`, `<glossUsage>`, `<glossdef>`, `<glossterm>`, `<info>`, `<postreq>`, `<prereq>`, `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`, `<responsibleParty>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
General task, Task	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<info>`, `<postreq>`, `<prereq>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
Glossary entry, Glossary group	Everything in Topic (technical content), plus: `<glossAbbreviation>`, `<glossAcronym>`, `<glossProperty>`, `<glossScopeNote>`, `<glossShortForm>`, `<glossSurfaceForm>`, `<glossSynonym>`, `<glossUsage>`, `<glossdef>`, `<glossterm>`
Reference	Everything in Topic (technical content), plus: `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`
Troubleshooting	Everything in Task, plus: `<responsibleParty>`

Content models for `<xref>`

In this document type	`<xref>` contains
Base map, Base topic, Subject scheme, Learning assessment, Learning bookmap, Learning content, Learning group map, Learning map, Learning object map, Learning overview, Learning plan, Learning summary	(text data \| `<b>` \| `<boolean>` \| `<cite>` \| `<data>` \| `<data-about>` \| `<desc>` \| `<draft-comment>` \| `<foreign>` \| `<i>` \| `<image>` \| `<keyword>` \| `<line-through>` \| `<overline>` \| `<ph>` \| `<q>` \| `<required-cleanup>` \| `<sort-as>` \| `<state>` \| `<sub>` \| `<sup>` \| `<term>` \| `<text>` \| `<tm>` \| `<tt>` \| `<u>` \| `<unknown>`)*
Bookmap, Classify map, Map (technical content)	(text data \| `<abbreviated-form>` \| `<apiname>` \| `<b>` \| `<boolean>` \| `<cite>` \| `<cmdname>` \| `<codeph>` \| `<data>` \| `<data-about>` \| `<desc>` \| `<draft-comment>` \| `<filepath>` \| `<foreign>` \| `<i>` \| `<image>` \| `<keyword>` \| `<line-through>` \| `<markupname>` \| `<menucascade>` \| `<msgnum>` \| `<msgph>` \| `<numcharref>` \| `<option>` \| `<overline>` \| `<parameterentity>` \| `<parmname>` \| `<ph>` \| `<q>` \| `<required-cleanup>` \| `<sort-as>` \| `<state>` \| `<sub>` \| `<sup>` \| `<synph>` \| `<systemoutput>` \| `<term>` \| `<text>` \| `<textentity>` \| `<tm>` \| `<tt>` \| `<u>` \| `<uicontrol>` \| `<unknown>` \| `<userinput>` \| `<varname>` \| `<wintitle>` \| `<xmlatt>` \| `<xmlelement>` \| `<xmlnsname>` \| `<xmlpi>`)*
Concept, Ditabase, General task, Glossary entry, Glossary group, Reference, Task, Topic (technical content), Troubleshooting	(text data \| `<abbreviated-form>` \| `<apiname>` \| `<b>` \| `<boolean>` \| `<cite>` \| `<cmdname>` \| `<codeph>` \| `<data>` \| `<data-about>` \| `<desc>` \| `<draft-comment>` \| `<equation-inline>` \| `<filepath>` \| `<foreign>` \| `<i>` \| `<image>` \| `<keyword>` \| `<line-through>` \| `<markupname>` \| `<mathml>` \| `<menucascade>` \| `<msgnum>` \| `<msgph>` \| `<numcharref>` \| `<option>` \| `<overline>` \| `<parameterentity>` \| `<parmname>` \| `<ph>` \| `<q>` \| `<required-cleanup>` \| `<sort-as>` \| `<state>` \| `<sub>` \| `<sup>` \| `<svg-container>` \| `<synph>` \| `<systemoutput>` \| `<term>` \| `<text>` \| `<textentity>` \| `<tm>` \| `<tt>` \| `<u>` \| `<uicontrol>` \| `<unknown>` \| `<userinput>` \| `<varname>` \| `<wintitle>` \| `<xmlatt>` \| `<xmlelement>` \| `<xmlnsname>` \| `<xmlpi>`)*
Machinery task	(text data \| `<b>` \| `<boolean>` \| `<cite>` \| `<data>` \| `<data-about>` \| `<desc>` \| `<draft-comment>` \| `<foreign>` \| `<i>` \| `<image>` \| `<keyword>` \| `<line-through>` \| `<menucascade>` \| `<overline>` \| `<ph>` \| `<q>` \| `<required-cleanup>` \| `<sort-as>` \| `<state>` \| `<sub>` \| `<sup>` \| `<svg-container>` \| `<term>` \| `<text>` \| `<tm>` \| `<tt>` \| `<u>` \| `<uicontrol>` \| `<unknown>` \| `<wintitle>`)*

In this document type	`<xref>` is contained by
Base map, Subject scheme	`<area>`, `<b>`, `<data>`, `<dd>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<entry>`, `<fig>`, `<figgroup>`, `<fn>`, `<howtoavoid>`, `<i>`, `<itemgroup>`, `<li>`, `<line-through>`, `<lines>`, `<lq>`, `<note>`, `<overline>`, `<p>`, `<ph>`, `<pre>`, `<q>`, `<shortdesc>`, `<sli>`, `<stentry>`, `<sub>`, `<sup>`, `<tt>`, `<u>`
Base topic	`<abstract>`, `<area>`, `<b>`, `<bodydiv>`, `<data>`, `<dd>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<entry>`, `<example>`, `<fig>`, `<figgroup>`, `<fn>`, `<howtoavoid>`, `<i>`, `<itemgroup>`, `<li>`, `<line-through>`, `<lines>`, `<linkinfo>`, `<lq>`, `<note>`, `<overline>`, `<p>`, `<ph>`, `<pre>`, `<q>`, `<section>`, `<sectiondiv>`, `<shortdesc>`, `<sli>`, `<stentry>`, `<sub>`, `<sup>`, `<tt>`, `<u>`
Classify map, Map (technical content)	Everything in Base map, plus: `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<codeblock>`, `<codeph>`, `<pd>`, `<pt>`, `<screen>`, `<synnote>`
Concept, Topic (technical content)	Everything in Base topic, plus: `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<codeblock>`, `<codeph>`, `<equation-block>`, `<equation-figure>`, `<equation-inline>`, `<pd>`, `<pt>`, `<screen>`, `<synnote>`
Bookmap	Everything in Map (technical content), plus: `<organizationname>`
Learning bookmap	Everything in Base map, plus: `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<organizationname>`
Learning group map, Learning map, Learning object map	Everything in Base map, plus: `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`
Ditabase	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<glossProperty>`, `<glossScopeNote>`, `<glossUsage>`, `<glossdef>`, `<info>`, `<postreq>`, `<prereq>`, `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`, `<responsibleParty>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
General task, Task	Everything in Topic (technical content), plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<info>`, `<postreq>`, `<prereq>`, `<result>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<tasktroubleshooting>`, `<tutorialinfo>`
Glossary entry, Glossary group	Everything in Topic (technical content), plus: `<glossProperty>`, `<glossScopeNote>`, `<glossUsage>`, `<glossdef>`
Reference	Everything in Topic (technical content), plus: `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<refsyn>`
Machinery task	Everything in Base topic, plus: `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<esttime>`, `<info>`, `<perscat>`, `<perskill>`, `<personnel>`, `<postreq>`, `<prereq>`, `<reqcond>`, `<reqcontp>`, `<result>`, `<safecond>`, `<screen>`, `<spare>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<supequi>`, `<supply>`, `<tasktroubleshooting>`, `<tutorialinfo>`
Troubleshooting	Everything in Task, plus: `<responsibleParty>`
Learning assessment, Learning overview, Learning summary	`<abstract>`, `<area>`, `<b>`, `<bodydiv>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<data>`, `<dd>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<entry>`, `<example>`, `<fig>`, `<figgroup>`, `<fn>`, `<i>`, `<itemgroup>`, `<lcAnswerContent>`, `<lcAnswerContent2>`, `<lcArea>`, `<lcArea2>`, `<lcAudience>`, `<lcChallenge>`, `<lcFeedback>`, `<lcFeedback2>`, `<lcFeedbackCorrect>`, `<lcFeedbackCorrect2>`, `<lcFeedbackIncorrect>`, `<lcFeedbackIncorrect2>`, `<lcInstruction>`, `<lcInstructornote>`, `<lcInstructornote2>`, `<lcInteractionBase>`, `<lcInteractionBase2>`, `<lcIntro>`, `<lcItem>`, `<lcItem2>`, `<lcMatchingItem>`, `<lcMatchingItem2>`, `<lcNextSteps>`, `<lcObjective>`, `<lcObjectivesStem>`, `<lcOpenAnswer>`, `<lcOpenAnswer2>`, `<lcPrereqs>`, `<lcQuestion>`, `<lcQuestion2>`, `<lcQuestionBase>`, `<lcQuestionBase2>`, `<lcResources>`, `<lcReview>`, `<lcSummary>`, `<lcTime>`, `<li>`, `<line-through>`, `<lines>`, `<linkinfo>`, `<lq>`, `<note>`, `<overline>`, `<p>`, `<ph>`, `<pre>`, `<q>`, `<section>`, `<sectiondiv>`, `<shortdesc>`, `<sli>`, `<stentry>`, `<sub>`, `<sup>`, `<tt>`, `<u>`
Learning content	`<abstract>`, `<area>`, `<b>`, `<bodydiv>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<chdesc>`, `<chdeschd>`, `<choice>`, `<choption>`, `<choptionhd>`, `<cmd>`, `<context>`, `<data>`, `<dd>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<entry>`, `<example>`, `<fig>`, `<figgroup>`, `<fn>`, `<i>`, `<info>`, `<itemgroup>`, `<lcAnswerContent>`, `<lcAnswerContent2>`, `<lcArea>`, `<lcArea2>`, `<lcAudience>`, `<lcChallenge>`, `<lcFeedback>`, `<lcFeedback2>`, `<lcFeedbackCorrect>`, `<lcFeedbackCorrect2>`, `<lcFeedbackIncorrect>`, `<lcFeedbackIncorrect2>`, `<lcInstruction>`, `<lcInstructornote>`, `<lcInstructornote2>`, `<lcInteractionBase>`, `<lcInteractionBase2>`, `<lcIntro>`, `<lcItem>`, `<lcItem2>`, `<lcMatchingItem>`, `<lcMatchingItem2>`, `<lcNextSteps>`, `<lcObjective>`, `<lcObjectivesStem>`, `<lcOpenAnswer>`, `<lcOpenAnswer2>`, `<lcPrereqs>`, `<lcQuestion>`, `<lcQuestion2>`, `<lcQuestionBase>`, `<lcQuestionBase2>`, `<lcResources>`, `<lcReview>`, `<lcSummary>`, `<lcTime>`, `<li>`, `<line-through>`, `<lines>`, `<linkinfo>`, `<lq>`, `<note>`, `<overline>`, `<p>`, `<ph>`, `<postreq>`, `<pre>`, `<prereq>`, `<propdesc>`, `<propdeschd>`, `<proptype>`, `<proptypehd>`, `<propvalue>`, `<propvaluehd>`, `<q>`, `<refsyn>`, `<result>`, `<section>`, `<sectiondiv>`, `<shortdesc>`, `<sli>`, `<stentry>`, `<stepresult>`, `<steps-informal>`, `<stepsection>`, `<steptroubleshooting>`, `<stepxmp>`, `<sub>`, `<sup>`, `<tasktroubleshooting>`, `<tt>`, `<tutorialinfo>`, `<u>`
Learning plan	`<abstract>`, `<area>`, `<b>`, `<bodydiv>`, `<change-request-id>`, `<change-request-system>`, `<change-revisionid>`, `<change-summary>`, `<data>`, `<dd>`, `<desc>`, `<div>`, `<draft-comment>`, `<dt>`, `<entry>`, `<example>`, `<fig>`, `<figgroup>`, `<fn>`, `<i>`, `<itemgroup>`, `<lcAge>`, `<lcAnswerContent>`, `<lcAnswerContent2>`, `<lcArea>`, `<lcArea2>`, `<lcAssessment>`, `<lcAttitude>`, `<lcAudience>`, `<lcBackground>`, `<lcCIN>`, `<lcChallenge>`, `<lcClassroom>`, `<lcClient>`, `<lcConstraints>`, `<lcDelivDate>`, `<lcDelivery>`, `<lcDownloadTime>`, `<lcEdLevel>`, `<lcFeedback>`, `<lcFeedback2>`, `<lcFeedbackCorrect>`, `<lcFeedbackCorrect2>`, `<lcFeedbackIncorrect>`, `<lcFeedbackIncorrect2>`, `<lcFileSizeLimitations>`, `<lcGapItemDelta>`, `<lcGeneralDescription>`, `<lcGoals>`, `<lcGraphics>`, `<lcHandouts>`, `<lcInstruction>`, `<lcInstructornote>`, `<lcInstructornote2>`, `<lcInteractionBase>`, `<lcInteractionBase2>`, `<lcIntro>`, `<lcItem>`, `<lcItem2>`, `<lcJtaItem>`, `<lcKnowledge>`, `<lcLMS>`, `<lcLearnStrat>`, `<lcMatchingItem>`, `<lcMatchingItem2>`, `<lcModDate>`, `<lcMotivation>`, `<lcNeeds>`, `<lcNextSteps>`, `<lcNoLMS>`, `<lcOJT>`, `<lcObjective>`, `<lcObjectivesStem>`, `<lcOpenAnswer>`, `<lcOpenAnswer2>`, `<lcOrgConstraints>`, `<lcPlanDescrip>`, `<lcPlanObjective>`, `<lcPlanPrereqs>`, `<lcPlanResources>`, `<lcPlanSubject>`, `<lcPlanTitle>`, `<lcPlayers>`, `<lcPrereqs>`, `<lcProcesses>`, `<lcQuestion>`, `<lcQuestion2>`, `<lcQuestionBase>`, `<lcQuestionBase2>`, `<lcResolution>`, `<lcResources>`, `<lcReview>`, `<lcSecurity>`, `<lcSkills>`, `<lcSpecChars>`, `<lcSummary>`, `<lcTaskItem>`, `<lcTime>`, `<lcValues>`, `<lcViewers>`, `<lcW3C>`, `<lcWorkEnvDescription>`, `<li>`, `<line-through>`, `<lines>`, `<linkinfo>`, `<lq>`, `<note>`, `<overline>`, `<p>`, `<ph>`, `<pre>`, `<q>`, `<section>`, `<sectiondiv>`, `<shortdesc>`, `<sli>`, `<stentry>`, `<sub>`, `<sup>`, `<tt>`, `<u>`