<relatedSubjects> element establishes associative
relationships between each child subject and every other child subject (unless the association is
restricted by the
@linking attribute of the subjects).
For filtering and flagging, processors need only inspect the subordinate hierarchies under category subjects that are bound to attributes. Filtering and flagging processors do not have to understand specific types of relationships. Explicit relationships are useful primarily for information viewers with advanced capabilities.
The content provider can identify the relationship by specifying a
attribute, label the relationship by specifying a
<navtitle> element or
@navtitle attribute, and provide a consensus definition of the
relationship including by referencing a topic. If the relationship has an identifying key, the
content provider can use the
@keyref attribute to specify the same relationship for
See appendix for information about this element in OASIS document type shells.
- map/topicref subjectScheme/relatedSubjects
<subjectScheme> <!-- ... --> <relatedSubjects> <subjectdef keys="linux" navtitle="Linux"/> <subjectdef keys="apacheweb" navtitle="Apache Web Server"/> <subjectdef keys="mysql" navtitle="MySQL Database"/> </relatedSubjects> <!-- ... --> </subjectScheme>
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,
@keyref. This element also uses
@collection-type, and a narrowed definition of
@linking (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.
@linkingattribute has a default value of "normal". Otherwise, the attribute is the same as defined in Attributes common to many map elements.
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