Hi, Jim.
Statuses, constraints, etc. default to the longer names when added to a report. I've had success with removing the "enum" lines via the text mode editor. In this case:
displayname=taskConstraint
linkedname=direct
namekey=taskConstraint
querysort=taskConstraint
textmode=true
valuefield=taskConstraint
valueformat=val
To test it, I removed the 3 text mode lines that reference "enum", and my view returned the abbreviation instead.
I hope that helps.
Harold