<hasNarrower>
For subjects within the <hasNarrower> element, the container
subject is more general than each of the contained subjects. That is, this element
makes the
default hierarchical relationship explicit, although the way in which a relationship
is narrower
is not specified.
Content models
See appendix for information about this element in OASIS document type shells.
Inheritance
- map/topicref subjectScheme/hasNarrower
Example
This example specifies that Planting Roses is a narrower subject category than Horticulture, although it is part of the Horticulture subject area.
<subjectScheme>
<hasNarrower>
<subjectdef keys="horticulture" navtitle="Horticulture">
<subjectdef keys="plantrose" navtitle="Planting Roses"/>
</subjectdef>
</hasNarrower>
</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.