[DAFFODIL-1782] DFDL Extension: Enum and Range table lookups

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.4.0
• Component/s: Back End, DFDL Language, Front End
• Assignee: Unassigned
• Reporter: Mike Beckerle
• Created: 02/Jun/17 00:40
• Updated: 20/May/21 20:01
• Resolved: 22/Jul/19 17:13

Description

Some schemas have large simple type unions that combine enumerations with many members, and numeric ranges.

Translation between numeric values, and symbolic values (strings), is desirable.

A proposal for how to do this is:
https://cwiki.apache.org/confluence/display/DAFFODIL/Proposal%3A+Features+to+Support+Table-Lookup

(This one is now obsolete:
https://opensource.ncsa.illinois.edu/confluence/display/DFDL/Enumerations+and+Range+Tables+via+Simple+Type+Unions)

��

Under review by the DFDL Workgroup, it was observed that these features require validation processing, and that was considered problematic given that validation is an optional feature of DFDL.�� However, the dfdl:checkConstraints function is not optional - excepting that the whole expression language is optional. So it is reasonable to add these features to an implementation that has either validation or dfdl:checkConstraints().

��