<schemeref> element references another subject
scheme map. Typically, the referenced subject scheme defines a base set of controlled values;
the referencing map then extends the base set of controlled values. The values specified in the
subject scheme maps are merged; the result is equivalent to specifying all of the values in a
See appendix for information about this element in OASIS document type shells.
- map/topicref subjectScheme/schemeref
The following attributes are available on this element: Universal attribute group, Link relationship attribute group (with narrowed definitions of
@type, given below),
@query 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.
@formatattribute sets a default value of "ditamap", because the purpose of the element is to reference a ditamap document. Otherwise, the attribute is the same as described in Link relationship attribute group.
<schemeref>element, this value defaults to "scheme", because the element is expected to point to another subject scheme.
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