Language reference : Base architecture : Specialization elements : unknown
   
unknown
The <unknown> element is an open extension that allows information architects to incorporate xml fragments that do not necessarily fit into an existing DITA use case. Processors should ignore this element unless otherwise instructed.
Contains
Note: These models represent only the default document types distributed by OASIS. Actual content models will differ with each new document type.
Doctype
Content model
topic, map, concept, ditabase, glossary, glossentry, glossgroup, reference, task, bookmap, classifyMap, subjectScheme, machineryTask, learningAssessment, learningBookmap, learningContent, learningMap, learningOverview, learningPlan, learningSummary
ANY
Contained by
Doctype
Content model
topic (base)
map (base), classifyMap, learningMap
topic (technical content)
map (technical content)
concept
ditabase
glossary, glossentry, glossgroup
reference
task (strict), task (general)
bookmap
subjectScheme
machineryTask
learningAssessment, learningOverview, learningSummary
learningBookmap
learningContent
learningPlan
Inheritance
- topic/unknown
Example 194. Example
This example features a specialized <unknown> element that includes other non-DITA content. If this specialization is imported to a DTD or schema, the DTD or schema will need to handle declaring the new elements or any namespaces.
<body>
<my-unknown class="+ topic/unknown mything/my-unknown ">
<thing value="4"/>
<otherthing value="16"/>
</my-unknown>
</body>
Attributes
Name
Description
Data Type
Default Value
Required?
univ-atts attribute group (includes select-atts, id-atts, and localization-atts groups)
A set of related attributes, described in univ-atts attribute group
global-atts attribute group (xtrf, xtrc)
A set of related attributes, described in global-atts attribute group
class, outputclass
Common attributes described in Other common DITA attributes