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https://issues.apache.org/jira/browse/DAFFODIL-2808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17712677#comment-17712677
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Mike Beckerle commented on DAFFODIL-2808:
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Is this only a validation error when doing Daffodil's Limited validation? I'm
going to assume so. This is Daffodil's check, not Xerces check.
I believe when we set daffodil validation "on" it does BOTH the limited
daffodil-code-base validation and feeds the output XML to Xerces for separate
validation.
Specifically, if we turn off all Daffodil validation, but a separate Xerces
validator validates the XML, then I assume this would not be an issue.
But that's only true if nobody is calling dfdl:checkConstraints which invokes
daffodil's facet validation (and max/min occurs validation? - tbd)
In your scenario, is checkConstraints being used? If so, can you avoid that?
(I.e., is that a usable workaround?)
> Incorrect Validation Error on Optional Element with Children
> ------------------------------------------------------------
>
> Key: DAFFODIL-2808
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2808
> Project: Daffodil
> Issue Type: Bug
> Components: Back End
> Affects Versions: 3.5.0
> Reporter: Olabusayo Kilo
> Priority: Major
> Attachments: optionElementTest.scala, optionalElement.tdml
>
>
> When you have an optional element with children element, daffodil calculates
> the number of occurrences it has by looking at the number of children it has,
> rather than calculating the number of times it appears. This results in an
> validation error saying the element occurred NUM_OF_CHILDREN_TIME when it was
> expected.
> Attached is a TDML test that shows this incorrect validation error
> I narrowed down the error to
> src/main/scala/org/apache/daffodil/runtime1/processors/parsers/SequenceChildBases.scala
> line 543 in endArray
> {code:scala}
> val occurrence = {
> val maybeLastChild = state.infoset.maybeLastChild
> if (maybeLastChild.isEmpty || maybeLastChild.get.erd != erd)
> 0
> else
> maybeLastChild.get.numChildren
> }
> {code}
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