Processing chunk="split"
    
  
The presence of 
    chunk="split" instructs a processor to split each
    topic from the referenced source document into its own document for
    rendering
    purposes.
The following rules apply:
- When chunk="split"is specified on the root element of a map, it sets a default operation for all source DITA documents in the navigation structure of the map. The defaultsplitvalue is used except where acombinevalue is encountered, in which casecombinetakes over for that entire branch.
- When chunk="split"is specified on a<topicref>element that references a source DITA document, it indicates that all topics within the referenced document should be rendered as individual documents.
- When chunk="split"is specified on an element such as<topicgroup>that does not reference a source DITA document or result in published output, the attribute has no meaning.