Chunking behavior in learning maps is unexpected and not documented

[simonbate]

Expected Behavior

Learning maps should be chunked ONLY as how the author specifies.

Actual Behavior

<learning*Ref> elements in a learningObjectMap are chunked without allowing author to specify the behavior.

Possible Solution

• This chunking behavior in learning maps should be optional. (It can be turned off with build-step.chunk, or in earlier OTs, by setting preprocess.chunk.skip, but this would mean turning off ALL chunking, which would be sub-optimal.)
• This behavior should be documented. If it is, the doc is not very findable.
• It would also be useful to know if there are any other topic types/elements that chunk "automatically."

Steps to Reproduce

1. Create DITA learning content using learningObjectMap.
2. Create a learningObject in the map, add learningContentRef and learningPostAssessmentRef elements pointing to appropriate learning content.
3. Build using transtype="HTML5"
4. Output folder contains Chunk*.html files corresponding to each of the learning*Ref elements.

Copy of the error message, log file or stack trace

Environment

• DITA-OT version: 3.6.1
• Operating system and version: macOS
  (Linux, macOS, Windows)
• How did you run DITA-OT? dita command
  (dita command, Ant, startcmd, oXygen, other editor, CMS, etc.)
• Transformation type: HTML5
  (HTML5, PDF, custom, etc.)