July 2014 - dfdl-wg - lists.ogf.org

OGF DFDL WG Call Minutes 2014-07-08
by Steve Hanson 08 Jul '14

08 Jul '14

Please find minutes from the above call at http://redmine.ogf.org/dmsf_files/13277?download= Please review spec draft r15 on Redmine for next week's call. Regards Steve Hanson Architect, IBM DFDL, Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh(a)uk.ibm.com tel:+44-1962-815848

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updated errata on implementation-defined features
by Cranford, Jonathan W. 08 Jul '14

08 Jul '14

Working Group, I finished going through the specification looking for implementation-specific features that should be listed as "implementation-defined". Resulting document attached. The only item I added from the last draft was one for defining the number of fractional second digits supported in dfdl:calendarPattern. Track changes is turned on, so the addition should be apparent. Fyi, -- Jonathan W. Cranford <jcranford(a)mitre.org> Senior Information Systems Engineer The MITRE Corporation (http://www.mitre.org) 801-903-3431 [cell]

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Action 233 (deferred) - "byte order not sufficient..." - draft document on experience with binary format MIL-STD-2045
by Mike Beckerle 08 Jul '14

08 Jul '14

I have created an experience document about the "bit order" issue, which was a deferred action 233, and the subject of a public comment. The document is here: http://redmine.ogf.org/dmsf_files/13268. The public comment item is http://redmine.ogf.org/boards/15/topics/43. It recommends a new dfdl:bitOrder property, and a new dfdl:byteOrder enum value, without which it is impossible to model these data formats. It also recommends several other improvements to DFDL to facilitate handling these data formats. The formats in question are a variety of MIL-STD formats which are all densely packed binary data. These formats are in broad use. MIL-STD-2045 is one part of this family and this particular format specification is generally available without any restrictions from a US DoD web site ( http://assistdocs.com) so I made this specific format the subject of the document as it illustrates all the problematic issues. We have implemented the dfdl:bitOrder property in Daffodil, and it works with some useful tests now passing. We have also enhanced our TDML implementation to enable creation of tests for this feature (and in the process actually found two bugs in the MIL-STD-2045 spec!). Both the property and this TDML enhancement are described in the document. The sponsors of the Daffodil project are extremely keen to get this needed binary support into the DFDL v1.0 standard so as to have multiple DFDL implementations support it. ...mikeb Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.com Please note: Contributions to the DFDL Workgroup's email discussions are subject to the OGF Intellectual Property Policy <http://www.ogf.org/About/abt_policies.php>

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OGF DFDL WG Call Agenda 2014-07-08
by Steve Hanson 07 Jul '14

07 Jul '14

Please find agenda for call on Redmine at http://redmine.ogf.org/dmsf_files/13277?download= Regards Steve Hanson Architect, IBM Data Format Description Language (DFDL) Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh(a)uk.ibm.com tel:+44-1962-815848

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