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



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