<subjectref> element identifies a subject to classify content.
<subjectref> can identify the subject with a
attribute (if the scheme has a
<subjectdef> with a
attribute that assigns a key to the subject) or an
@href attribute (if the scheme is
not available and a topic exists that defines the subject).
See appendix for information about this element in OASIS document type shells.
+ map/topicref classify-d/subjectref
In the following example, the map is classified as covering the Linux subject and the "Developing
web applications" topic as covering the web and development subjects. These subjects (and their
keys) are defined externally in a subject scheme map; in order to reference the subject directly
without the subject scheme map, the
@href attribute would be used in place of
<map> <title>Working with Linux</title> <topicsubject keyref="linux"/> <!-- ... --> <topicref href="webapp.dita" navtitle="Developing web applications"> <topicsubject> <subjectref keyref="web"/> <subjectref keyref="development"/> </topicsubject> <!-- ... --> </topicref> <!-- ... --> </map>
The following attributes are available on this element: Universal attribute group, Link relationship attribute group (with a narrowed definition of
@href, given below),
@query from Topicref element attributes group, outputclass,
@keys. This element also uses
@linking, and narrowed definitions of
@toc (given below), from Attributes common to many map elements.
<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.
@processing-roleis "resource-only". Otherwise, the definition matches the one found in Attributes common to many map elements.
@tocis "no". See Attributes common to many map elements for a complete definition of
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