Open Grid Forum: Data Format Description Language Working Group OGF DFDL Working Group Call, February-18-2009, Attendees Alan Powell (IBM) Steve Hanson (IBM) Dave Glick (drac) Apologies Mike Beckerle(Oco) 1. XSD 1.1 Discussion deferred 2. Escape Schemes Further discussion of latest proposal. Noted the need to properly describe the function of escapeSceheme and in particular distinguish from substitution mechanisms such as XML entities which are sometimes called escapes. SH felt there could be confusion with the two use cases of escapeCharacter. Suggested separate properties. Action SH to document issues and improve wording Discussed whether comment type escapes should be supported. Decided they are not needed on V1. AP to confirm that if IBM products provide support. 2. Review Actions Action 20 - There had been a number of email exchanges following on from last weeks call. Decided to keep 'zoned' as it is well known to users who need the support. Discussion on whether dfdl should allow unsigned logical types to have 'signed' phsyical representation. If so what should be the behaviour when there is a mismatch of signs. Action: AP to describe behaviour 3. calendarFormats SH and AP have been discussing the behaviour of strict and lax parsing which needs a more complete description. 4. TypeSubsitution AP raised whether typeSubstitution needs to be supported in DFDL v1. 5. AOB DG to take a look at Work items 5 and 12 while continuing review MB will not be available next week Next call 25 February 14:00 Meeting closed, 15:00 GMT Actions raised at this meeting No Action 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 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 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. 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