<hasInstance>
The <hasInstance> element specifies that the contained subjects
have an INSTANCE-OF relationship with the container subject. In an INSTANCE-OF hierarchy,
the
child subject is a specific entity or object and the parent subject is a type, kind,
or class of
entity or object.
Content models
See appendix for information about this element in OASIS document type shells.
Inheritance
- map/topicref subjectScheme/hasInstance
Example
This example specifies that New York City, Reykjavik, and Moscow are each specific instances of a city.
<subjectScheme>
<hasInstance>
<subjectdef keys="city" navtitle="City">
<subjectdef keys="nyc" navtitle="New York City"/>
<subjectdef keys="reykjavik" navtitle="Reykjavik"/>
<subjectdef keys="moscow" navtitle="Moscow"/>
</subjectdef>
</hasInstance>
</subjectScheme>Attributes
The following attributes are available on this element: Universal attribute group, Link relationship attribute group (with a narrowed definition of @href, given below), @processing-role from Attributes common to many map elements, @navtitle from Topicref element attributes group, @outputclass, @keys, and @keyref.
- @href
- A pointer to the resource represented by the <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 @format attribute to identify the kind of resource being referenced.