The <no-topic-nesting> element is a placeholder in the DITA architecture. It is not actually used by the default DITA document types; it is for use only when creating a validly customized document type where the information designer wants to eliminate the ability to nest topics. Not intended for use by authors, and has no associated output processing.
| Doctype | Content model | 
|---|---|
| topic, concept, ditabase, glossary, glossentry, glossgroup, reference, task, machineryTask, learningAssessment, learningContent, learningOverview, learningPlan, learningSummary | no content | 
| Doctype | Content model | 
|---|---|
| ditabase, glossary, glossentry, glossgroup | glossentry | 
| learningAssessment | learningAssessment | 
| learningContent | topic, task, concept, reference, learningSummary, learningAssessment | 
| learningOverview | learningOverview | 
| learningPlan | learningPlan | 
| learningSummary | learningSummary | 
| Name | Description | Data Type | Default Value | Required? | 
|---|---|---|---|---|
| global-atts attribute group (xtrf, xtrc) | A set of related attributes, described in global-atts attribute group | |||
| class | A common attribute described in Other common DITA attributes | 
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