document #299
Clarify choice branch behaviour when occursCountKind 'expression' and 'parsed'.
| Status: | closed | Start date: | 09/22/2015 | |
|---|---|---|---|---|
| Priority: | Normal | Due date: | ||
| Assignee: | Steve Hanson | % Done: | 100% |
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| Category: | - | |||
| Target version: | DFDL v1.0 | |||
| Document Type: | Proposed Recommendation |
Description
It is not clear what the correct outcome should be in a choice where a branch is optional or an array, and dfdl:occursCountKind is 'expression' and the count resolves to zero or is 'parsed' and zero occurrences are found.
a) resolve the choice to the zero length array
b) move to the next choice branch
c) throw an error
History
Updated by Steve Hanson about 7 years ago
- % Done changed from 0 to 100
The existing choice branch rule that says minOccurs must not be 0 should remain, for consistency with not allowing minOccurs 0 on the choice itself.
Choice branch with dfdl:occursCountKind 'expression' should be allowed. If the expression resolves to 0 then there are no occurrences and the branch is missing, so the parser looks for the next branch. This preserves the rule that a branch must exist.
Choice branch with dfdl:occursCountKind 'parsed' should be allowed. If the parser does not find any occurrences then the branch is missing, so the parser looks for the next branch. This preserves the rule that a branch must exist.
Updated by Steve Hanson over 5 years ago
- % Done changed from 100 to 50
Updated by Steve Hanson almost 5 years ago
- Target version set to DFDL v1.0
Due to elapsed time since raised, need to verify the conclusions
Updated by Michael Beckerle over 3 years ago
Discussed on DFDL WG Call on 2019-06-27.
Verified the conclusions. Clarifications to be added to spec based on language in comments above.
Updated by Michael Beckerle about 3 years ago
- % Done changed from 50 to 100
Erratum 5.39 added to Errata document. Language to be reviewed there.
Updated by Michael Beckerle about 3 years ago
- Status changed from submitted to accepted
Updated by Michael Beckerle about 2 years ago
- Status changed from accepted to closed
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