The @keys
attribute
A @keys
attribute consists of one or more space-separated keys. Map
authors define keys using a <topicref>
or <topicref>
specialization that contains the @keys
attribute. Each key definition introduces
an identifier for a resource referenced from a map. Keys resolve to the resources given as the
@href
value on the key definition <topicref>
element, to
content contained within the key definition <topicref>
element, or
both.
The
@keys
attribute uses the
following syntax:- The value of the
@keys
attribute is one or more space-separated key names. - Key names consist of characters that are legal in a URI. The case of key names is significant.
- The following characters are prohibited in key names: "{", "}", "[", "]", "/", "#", "?", and whitespace characters.
A key cannot resolve to sub-topic elements, although a
@keyref
attribute can do so by combining a key
with a sub-topic element id.