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.
See appendix for information about this element in OASIS document type shells.
- map/topicref subjectScheme/hasNarrower
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>
The following attributes are available on this element: Universal attribute group, Link relationship attribute group (with a narrowed definition of
@processing-role from Attributes common to many map elements,
@navtitle from 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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