April 2022 - dfdl-wg - lists.ogf.org

Agenda for OGF DFDL WG Call
by Steve Hanson 07 Sep '22

07 Sep '22

Please find agenda for next call on GitHub at https://github.com/OpenGridForum/DFDL/blob/master/calls/2022-04-07_DFDL-WG-… Regards Steve Hanson IBM Hybrid Integration, Hursley, UK Architect, IBM DFDL<http://www.ibm.com/developerworks/library/se-dfdl/index.html> Co-Chair, OGF DFDL Working Group<http://www.ogf.org/dfdl/> smh(a)uk.ibm.com<mailto:smh@uk.ibm.com> mob:+44-7717-378890 Note: I work Tuesday to Friday

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Latest OGF DFDL WG Call Minutes
by Steve Hanson 12 Aug '22

12 Aug '22

Please find minutes from the latest call at https://github.com/OpenGridForum/DFDL/wiki/DFDL-Workgroup-News. Regards Steve Hanson IBM Hybrid Integration, Hursley, UK Architect, IBM DFDL<http://www.ibm.com/developerworks/library/se-dfdl/index.html> Co-Chair, OGF DFDL Working Group<http://www.ogf.org/dfdl/> smh(a)uk.ibm.com<mailto:smh@uk.ibm.com> mob:+44-7717-378890 Note: I work Tuesday to Friday

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Suggest new lengthKind 'patternMatch' where failure to match is a parse error
by Mike Beckerle 12 Apr '22

12 Apr '22

Apache Daffodil users have had quite a lot of trouble with understanding and proper use of dfdl:lengthKind 'pattern'. This is due to the fact that no match does *not* cause a parse error, but provides a successful parse with length of zero. People generally find this unintuitive given that if they wanted a zero-length match they could have defined their regex to allow a zero-length match. I have made this mistake repeatedly myself when creating DFDL schemas, and supposedly I'm an expert in DFDL. This has been so problematic that I suggest we add an additional enum for lengthKind of 'patternMatch' or maybe 'patternMatchRequired' (I'm open to suggestions for best name here) which is the same as 'pattern', except that failure to match results in a parse error instead of zero length success. I would argue that the existing 'pattern' behavior is badly designed, but it is too late to change it for DFDL v1.0. Rather, for DFDL v2.0 we should add a new correct behavior and call it 'patternMatch' and then we can deprecate the existing lengthKind 'pattern'. Has anyone else had similar difficult experience with lengthKind 'pattern' ? Mike Beckerle Apache Daffodil PMC | daffodil.apache.org OGF DFDL Workgroup Co-Chair | www.ogf.org/ogf/doku.php/standards/dfdl/dfdl Owl Cyber Defense | www.owlcyberdefense.com

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[ANNOUNCE] Apache Daffodil VS Code 1.0.0 Released
by Mike Beckerle 05 Apr '22

05 Apr '22

The Apache Daffodil community is pleased to announce the release of version 1.0.0 of the Daffodil VS Code Extension. This is the first official release of the Apache Daffodil VS Code Extension. Detailed release notes and downloads are available at: https://daffodil.apache.org/vscode/1.0.0/ The Apache Daffodil VS Code Extension is an open-source extension that utilizes Apache Daffodil to allow users to interactively debug a DFDL schema inside of VS Code. For more information about Daffodil visit: https://daffodil.apache.org/ Regards, The Apache Daffodil Team

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