Mike Beckerle created DAFFODIL-2941:
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Summary: Implement DFDL experimental offset/pointer feature
Key: DAFFODIL-2941
URL: https://issues.apache.org/jira/browse/DAFFODIL-2941
Project: Daffodil
Issue Type: New Feature
Components: Back End, Front End
Affects Versions: 3.9.0
Reporter: Mike Beckerle
A major feature of DFDL slated for v2.0 of the spec is the offset pointer
feature described in this DFDL Workgroup document:
[https://github.com/OpenGridForum/DFDL/blob/master/docs/current/gwde-dfdl-experience-8-experimental-indirection.docx]
This needs prototyping/implementation in Daffodil as a way of thoroughly
vetting the feature proposal and getting clarifications where it is unclear, as
well as providing a 2nd implementation which is needed for the standards
process.
(note: At one time it was thought that this indirection feature might be
sufficient to allow DFDL to describe some complex pointer/offset based data
formats like TIFF image format. That problem seems to still be out of reach
due to the "linked-list of unknown length" situation in that format. This
capability is not present in the proposed DFDL extension.)
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