Open Grid Forum: Data Format Description Language Working Group Weekly Working Group Conference Call 15:00 GMT, 16 January 2009 Attendees Steve Hanson (IBM) Alan Powell (IBM) Mike Beckerle(Oco) 1. Non-supported XSD constructs in DFDL schema It was agreed that dfdl v1 will not allow non-supported XSD constructs, such as attributes, to exist in dfdl schema. That is they will be treated as errors rather than ignored. 2. XSD 1.1 For next meeting we will revisit the list of areas to be investigated produced by MB 3. Padding to minlength Proposal documented in last call ( 10 December 2008) was approved 4. Implicit Lengths Decided to disallow zoned for Float and Double. Approved Use numberPattern for all zoned lengths instead of fixed length implied by type - Approved Discussed using virtual decimal point and/or farctional digits for implied length of decimal. Decided against. Need to complete for Date/Time, Date, Time Drop DFDL support for duration as a logical type. Action: check with WTX Simple type text (+ xml) binary String Length/maxlength n/a Float Text: numberPattern (length of positive subpattern) 32 Double Text: numberPattern 64 Decimal/Integer Text: numberPattern Zoned:numberPattern Pkd/bcd: (TotalDigits+1)/2 Long, UnsignedLong Text: numberPattern Zoned:numberPattern binary: 64 Pkd/bcd: (TotalDigits+1)/2 Int, Unsignedint Text: numberPattern Zoned:numberPattern binary: 32 Pkd/bcd: (TotalDigits+1)/2 Short, Unsignedshort Text: numberPattern Zoned:numberPattern binary: 16 Pkd/bcd: (TotalDigits+1)/2 Byte, Unsignedbyte Text: numberPattern Zoned:numberPattern binary: 8 Pkd/bcd: (TotalDigits+1)/2 DateTime Calendarpattern Date Calendarpattern Time Calendarpattern Duration Calendarpattern Boolean Length of textBooleanTrue 32 HexBinary n/a Length/maxlength 5. Calendar formats Briefly discussed supplement emailed by AP. Has been updated and will be redistributed Note change from SecondsSinceEpoc and milliSecondsSinceEpoc to binary not implemented as it was based on using length of logical type to decide which to use but DateTime, Date and Time types do not have variable length. 3. Zoned Decimal Discussed behaviour of IBM iSeries not overpunching positive numbers. Approved changes. 4. AOB Next call 21 January 14:00 Meeting closed, 16:00 GMT Actions raised at this meeting No Action 030 AP: confirm with WTX that can drop duration 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 020 SH: Resolve packedDecimalSignCodes behaviour depends on NumberCheckPolicy 22/10: No progress 10/12: added how to decide to overpunch and sign position 023 MB: Review Schema 1.1 024 String XML type 025 Escape schemes 026 SH: Envelopes and Payloads 027 Property precedence tables 028 Variable markup 029 valueCalc (output length calculation) 030 AP: confirm with WTX that can drop duration Closed actions: 003 AP: Update spec from WTX document 13/8: All resolved issues have been added to spec. Remaining unresolved items need discussion 10/9: Alan will pull out the remaining unresolved items and circulate for discussion next week 17/9: Doc distributed and partially discussed 15/10: All updateds complete except minlength 22/10: No update 12/11: Updates have been sent to wtx to review. Will chase up for comments 16/1: Updates have been made to spec v033. Closed 018 AP: Agree padding to minimum length 15/10: Needs documenting 22/10: No update 26/11: discussed and AP to suggest dfdl:minlength 16/1: proposal approved. Closed 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 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. 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