Open Grid Forum: Data Format Description Language Working Group OGF DFDL Working Group Call, February-25-2009, Attendees Alan Powell (IBM) Steve Hanson (IBM) Dave Glick (drac) Tim Kimber (IBM) Apologies Mike Beckerle(Oco) 1. Discussion of D Glick Spec 033 review Dave has done a thorough review of DFDL Spec v033 and circulated an email with the major point which was discussed on this call. Major areas discussed - Balance of formal spec vs Primer. The spec should be make a clearer distiction between normative and non-normative information. - Parts of the document sound like implementation details which shouldn't be included - DG suggested clearer document structure but wasn't sure on the best oreder to list representation properties. Possible suggestion is alphabetic list of properties with a number of indexes giving different views. - Should be better with RFC2119 terminology SHOULD, MUST, etc - Discussed whether dfdl infoset should be should be subset/compatible with XML infoset or XDM. General agreement that it should be as compatible as possible with XDM. DG to investigate hwo close they can be made. - Types of DFDL properties should be more clearly specified. - DG wondered whether case sensitivity would work for all locales. Suggested investigate using collations. 5. AOB IBM want to have the spec technically complete within the next 6-8 weeks. Next call 1 March 14:00 Meeting closed, 15:00 GMT Actions raised at this meeting No Action 032 DG: Investigate compatibility between DFDL infoset and XDM Current Actions: No Action 012 AP/SH: Update decimalCalendarScheme 10/9: Not allocated yet 17/9: No update 24/9: Add calendar binary formats to actions 22/10: No progress 16/1: proposal distributed and discussed. Will be redistributed 21/1: add locale, 04/02: changed from locale to specific properties 18/2: Need more investigation of ICU strict/lax behaviour. 020 SH: Resolve packedDecimalSignCodes behaviour depends on NumberCheckPolicy 22/10: No progress 10/12: added how to decide to overpunch and sign position 11/02: proposal largely agreed. SH to make minor changes 18/02: AP to document unsigned type behaviour 25/02: no progress 023 MB: Review Schema 1.1 29/1: AP and SH to talk to Sandy Gao 04/02 Call arranged for Friday 11/02: Call took place. Identified useful changes. Consolidate with previous list. 024 String XML type 025 Escape schemes 21/1: discussed requirements 04/02: AP/SH to describe behaviour for known length text fields. Need to discuss if comment escapes should be supported. 11/02 new draft distributed: 18/02: SH up document concerns 25/02: SH and AP have refined proposal ready for approval. 026 SH: Envelopes and Payloads 027 Property precedence tables 028 Variable markup 029 valueCalc (output length calculation) 031 DG: Review dfdl v033 11/02: Initial comments received 18/02: Will include work items 5 and 12. 032 DG: Investigate compatibility between DFDL infoset and XDM Closed actions: 034 Work items: No Item 001 String XML type (Ian P) - Apr 30, 2008 002 Escape schemes (Ian P) - Apr 30, 2008 003 Variables - ??, 2008 (Mike) 005 Improvements on property descriptions - ??, 2008 (All - split TBD) 006 Envelopes and Payloads (Steve) - Apr 30, 2008 007 (from draft 32) valueCalc (Mike) - ??, 2008 mostly complete 008 (from draft 32) Property precedence for writing (Steve) - under review 009 (from draft 32) Variable markup (Steve) - Mar 31, 2008 proposal needs writing up 010 (from draft 32) Assertions, discriminators and choice, including discussion of timing option (Suman) - Mar 31, 2008 * in progress * 011 (from draft 32) How speculative parsing works (combining choice and variable-occurence - currently these are separate) ??, 2008 (IBM) in progress 012 (from draft 32) Reordering the properties discussion: move representation earlier, improve flow of topics ??, 2008 (Alan) * not started * 025 Augmented infoset and unparsing (Alan) added but needs work 026 Remove duration complete - specification updated Alan Powell MP 211, IBM UK Labs, Hursley, Winchester, SO21 2JN, England Notes Id: Alan Powell/UK/IBM email: alan_powell@uk.ibm.com Tel: +44 (0)1962 815073 Fax: +44 (0)1962 816898 Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU