Referencing a key with the @keyref attribute
The @keyref attribute provides an indirect, late-bound reference to
topics, to collections of topics (ditabase), to maps, to referenceable portions of maps, to
non-DITA documents, to external URIs, or to XML content contained within a key definition topic
reference. For content reference relationships, the
@conkeyref attribute similarly provides an indirect, late-bound reference to
reusable content. When the DITA content is processed, the key references are resolved using
key definitions from DITA maps.
When used within a DITA map, the @keyref attribute can only resolve to topics,
to elements within a DITA map, or to non-DITA resources.
When used within a DITA topic, the @keyref attribute can resolve to topics, to
elements within a DITA topic or map, or to non-DITA resources.
For references to topics, to elements within a map, or to non-DITA resources, the value of the
@keyref attribute is a key name.
For references to elements within a topic, the value of the @keyref attribute
is a key name, a slash ("/"), and the ID of the target element, where the key name must be bound
to the topic that contains the target element.