mbeckerle commented on a change in pull request #517:
URL: https://github.com/apache/daffodil/pull/517#discussion_r601726676
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File path:
daffodil-test/src/test/resources/org/apache/daffodil/section14/sequence_groups/SequenceGroupNestedArray.tdml
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@@ -219,6 +219,7 @@ notice blank lines are skipped
<ex:record>
<ex:item>notice lines of all commas are skipped</ex:item>
</ex:record>
+ <ex:record />
Review comment:
IBM DFDL differs from Daffodil in this new emptyElementParsePolicy
property. They only implement the treatAsAbsent semantics.
I'm thinking the minOccurs of this vector is 1. That means the first element
is actually required, not optional. IBM DFDL treats this as absent, and causes
the failure since an absent required element causes an error.
I think.
We can try specifying dfdlx:emptyElementParsePolicy='treatAsMissing' (which
is Daffodil's current realization of this property, and that behavior should
then be the same.
Or add a minOccurs="0" to the array, then both IBM and Daffodil should
behave the same.
That's my theory anyway.
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