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https://issues.apache.org/jira/browse/DAFFODIL-2036?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Adams resolved DAFFODIL-2036.
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Resolution: Fixed
Assignee: Dave Thompson (was: Josh Adams)
Fix Version/s: 2.3.0
This has been resolved in commit dfc40612d27eb891bb8bcad7fc2c653413187d78
> poor diagnostic - choice with sequences as branches with all optional content.
> ------------------------------------------------------------------------------
>
> Key: DAFFODIL-2036
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2036
> Project: Daffodil
> Issue Type: Bug
> Components: Middle "End"
> Affects Versions: 2.2.0
> Reporter: Michael Beckerle
> Assignee: Dave Thompson
> Priority: Major
> Fix For: 2.3.0
>
>
> Suppose you have this choice:
> <choice>
> <sequence>
> <element name="x" ... minOccurs="0"/>
> </sequence>
> <sequence>
> <element name="y" ... minOccurs="0"/>
> </sequence>
> </choice>
> <element name="foo" .../>
> You get an SDE with this message:
> Schema Definition Error: UPA violation. Multiple choice branches begin with
> {http://example.com}foo
> Note that elements with dfdl:outputValueCalc cannot be used to distinguish
> choice branches.
> The offending choice branches are:
> sequence[1] at Location in file:/tmp/s1_5963264522094411444.dfdl.xsd
> sequence[2] at Location in file:/tmp/s1_5963264522094411444.dfdl.xsd
> This occurs because the two branches of the choice meet the letter of the law
> by bing sequences which are considered "required", but as their content is
> all optional and they have no framing, they are conceptually optional.
> So there's really no way to look at the infoset and decide which arm of the
> choice.
> The error here should be that the content of a choice branch is entirely
> optional which isn't allowed.
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