DITA 1.3 Language Reference : Language reference: All-inclusive edition : Specialization elements : data-about
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data-about
The data-about element identifies the subject of a property when the subject isn't associated with the context in which the property is specified. The property itself is expressed by the data element. The data-about element handles exception cases where a property must be expressed somewhere other than inside the actual subject of the property. The data-about element is particularly useful as a basis for specialization in combination with the data element.
Important: Do not use the data-about element to identify the object of a property. The href attribute of the data element serves that purpose.
Content models
See appendix for information about this element in OASIS document type shells.
Inheritance
- topic/data-about
Example 221. Example
The full properties of a cited book can be maintained conveniently in the prolog:
<topic id="questions">
<title>Questions and answers</title>
<prolog>
<data-about href="urn:isbn:0156983508" scope="external">
<data name="title">The World Doesn't End</data>
<data name="author">
<data name="firstname">Charles</data>
<data name="lastname">Simic</data>
</data>
<data name="published" datatype="year">1989</data>
<!-- ... -->
</data-about>
<!-- ... -->
</prolog>
<body>
<!-- ... -->
<lq href="urn:isbn:0156983508">In a forest of question marks ...
</lq>
<!-- ... -->
</body>
</topic>
Attributes
The following attributes are available on this element: Universal attribute group, Link relationship attribute group, and outputclass