Steve Lawrence created DAFFODIL-2903:
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Summary: 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
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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