<topicref> element identifies a topic (such as a concept,
task, or reference) or other resource. A
<topicref> can contain other
<topicref> elements, allowing you to express navigation or table-of-contents
hierarchies, as well as implying relationships between a containing (parent)
<topicref> and its children. You can set the collection type of a parent
<topicref> to determine how its children are related to each other. You can
also express relationships among
<topicref> elements by using group and table
structures (such as
Relationships are expressed as links in the output; by default, each participant in a relationship
has links to the other participants in that relationship.
You can fine tune the output from your map by setting different attributes on the
element. For example, the
@linking attribute controls how a topic's
relationships to other topics are expressed as links, and the
controls whether the topic shows up in TOC or navigation output.
See appendix for information about this element in OASIS document type shells.
In this example, there are six
<topicref> elements. They are nested and
have a hierarchical relationship. bats.dita is the parent topic and the other
topics are its children.
<map title="Bats"> <topicref href="bats.dita" type="topic"> <topicref href="batcaring.dita" type="task"></topicref> <topicref href="batfeeding.dita" type="task"></topicref> <topicref href="batsonar.dita" type="concept"></topicref> <topicref href="batguano.dita" type="reference"></topicref> <topicref href="bathistory.dita" type="reference"></topicref> </topicref> </map>
The following attributes are available on this element: Universal attribute group, Link relationship attribute group (with a narrowed definition of
given below), Attributes common to many map elements, Topicref element attributes group, outputclass,
<topicref>. See The href attribute for detailed information on supported values and processing implications. References to DITA content cannot be below the topic level: that is, you cannot reference individual elements inside a topic. References to content other than DITA topics should use the
@formatattribute to identify the kind of resource being referenced.
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