Open Grid Forum: Data Format Description Language Working Group Weekly Working Group Conference Call 13:00 GMT, 22 July 2008 Attendees Mike Beckerle (Oco) Steve Hanson (IBM) Alan Powell (IBM) 1. Update to Decimal supplement Discussed MB comments on SH decimal supplement document. Agreed - added zeroSign to packedDecimalSignCodes which allows zero to be represented as all zero nibble - Move numberCheckPoicy out of dfdl:DefineNumberFormat (renamed to dfdl:DefineTextNumberFormat) so it can apply to binary representation. - add numberZeroRep to provide a special value for zero. er 'zero' 2. Discuss lengthKind issues Discussed lengthKind/scanability email distributed by AP Need to add to table truncation, fill for binary, more logical/physical type combinations such as logical number with text representation. lengthKind=Implicit no pad/ fill for sequences Long discussion on what the implicit length should be on unparse for various logical/physical type combinations. Decimal/integer with text representations look a problem. Action: SH to propose algorithm For number/text decided that min/maxInclusive would only be used for validation and not for any physical attributes. Action: Check all simple types vs representation and investigate if numberFormat can be used. . LengthKind=explicit Decided for choice dfdl=length will be used, choiceKind is only used for lengthKind=implicit Discussion of truncation is logical length is too big. Decided that truncation is only valid for fixed length strings and we need a new property to control whether it is valid or not. Action: propose new fixed length string truncation property. For text numbers if numberpattern produces a text string that is too long at runtime then it is a runtime error. lengthKind=prefixed Decided that there is no padding for variable length lengthKinds Will carry on discussion on next call 3. Hidden proposal Not discussed 4. Unresolved WTX issues Not discussed 5. AOB Next weeks (30 July) call will start at 13:00 UK for 2 hours in stead of an additional call. Meeting closed, 14:30 GMT Actions raised at this meeting No Action 009 SH: propose algorithm unparse length lengthKind=implicit decimal type/binary representation 010 AP: Document Fixed length string truncation property 011 SH: Update decimal supplement Current Actions: No Action 003 AP: Update spec from WTX document 16/7: in progress 004 MB: Mike will also author a new section in response to comments from Sandy Gao and Suman Kalia, explicitly connecting syntax with DFDL semantics 16/7: no progress 006 SH: Distribute hidden proposal 16/7: Done. MB to review 007 AP: enum + expression wording 16/7: no progress 033 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) 004 Selectors (Suman) - Apr 30, 2008 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) - *complete but 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 * 013 (from F2F) New scoping rules 014 (from F2F) Occurs, OccurSeparator changes 015 (from F2F) choices and Output (Mike) 016 (from F2F) xpath forward references (Alan) 017 (IBM WTX review) Minor agreed updates (Alan) 018 (IBM WTX review) Review generateNewLine (Alan) 020 (IBM WTX review) Special value for zero seen eg 'zero'. (Steve) 021 (IBM WTX review) 'EndOfData' changes (Alan) 022 (IBM WTX review) Unresolvable choices - infoset changes 023 (IBM WTX review) separatorKind=?prefix? ?infix? or ?postfix? (Alan) 024 (IBM WTX review) StopValue clarification (Alan) 025 Augmented infoset and unparsing (Alan) 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