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https://issues.apache.org/jira/browse/DAFFODIL-2013?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dave Thompson closed DAFFODIL-2013.
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Closing as Invalid per dev.
Verified the specified commit (commit 36b98fc2d78b0485af614202b4cd0c51cec9a2e3
) is included in the latest pull from the daffodil repository.
Verified, via review, changes identified in the commit comment were
implemented.
Verified the affected daffodil subproject sbt test suites executed
successfully, including the added test.
> Predicate required for when accessing optional elements in expression
> ---------------------------------------------------------------------
>
> Key: DAFFODIL-2013
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2013
> Project: Daffodil
> Issue Type: Bug
> Components: Front End
> Affects Versions: 2.2.0
> Reporter: Steve Lawrence
> Priority: Minor
>
> Behind the scenes we treat optional elements (e.g. minOccurs="1"
> dfdl:lengthKind="implicit"), as arrays that should just always have either
> zero or one elements. This means that when an expression attempts to access
> this element, a predicate of [1] is required. Otherwise you get an error
> about "Query-style paths not supported". We should have logic to treat
> optional elements special so that the predicate is not mandatory.
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