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https://issues.apache.org/jira/browse/DAFFODIL-2903?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Lawrence resolved DAFFODIL-2903.
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Fix Version/s: 3.8.0
Resolution: Fixed
Fixed in commit dc558743c067270cfe062943ea0cbfa69fea410b
> Allow inputValueCalc to apear in a hidden group
> -----------------------------------------------
>
> Key: DAFFODIL-2903
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2903
> Project: Daffodil
> Issue Type: New Feature
> Components: Front End
> Reporter: Steve Lawrence
> Priority: Major
> Fix For: 3.8.0
>
>
> Elements in a hidden group have a restriction that they must define
> dfdl:outputValueCalc, a default value, or are optional. This is necessary so
> that they can be unparsed without appearing in the infoset.
> It might also be useful to allow dfdl:inputValueCalc to appear in a hidden
> group. It seems a bit odd since we would calculate an element only to not
> include it in the infoset, but it could be useful as an interim calculation
> for another non-hidden inputValueCalc.
> On alternative to a hidden IVC is use a variable, but in some cases infoset
> paths/elements are easier to use since you don't have to worry about new
> variable instances or varable scoping.
>
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