<learningBase>
The <learningBase> topic type is not used to deliver any actual
         		learning content, but instead provides a set of common elements for use in the other
         more
         		specific learning content types: <learningOverview>,
         			<learningContent>, <learningSummary>,
         			<learningAssessment>, and
         		<learningPlan>.
      
      Content models
See appendix for information about this element in OASIS document type shells.
Inheritance
- topic/topic learningBase/learningBase
Attributes
The following attributes are available on this element: Universal attribute group (with a narrowed definition of @id, given below), Architectural attribute group, and @outputclass.
- @id (REQUIRED)
 - An anchor point. This ID is usually required as part of the @href or @conref syntax when cross referencing or reusing content within the topic; it also enables <topicref> elements in DITA maps to optionally reference a specific topic within a DITA document. This attribute is defined with the XML Data Type ID.