Open Grid Forum: Data Format Description Language Working Group

Weekly Working Group Conference Call
14:00 GMT, 04 February 2009


Attendees
Alan Powell (IBM)
Mike Beckerle(Oco)
Steve Hanson (IBM)
Dave Glick (drac)


1. XSD 1.1
SH and AP have scheduled a call with Sandy for this Friday

2. Welcome David Glick

MB welcomed David Glick to the WG. David gave some background to his interest in DFDL. He
is currently leading a SBIR project for the US Navy which involves efficiently parsing binary network data.
DG will review draft 033 and submit comments

3. Escape Schemes

Further discussion of proposal distributed by AP, in particular scanning/skipping known length text fields.

SH and AP pointed out that the (assumed) speculative parsing behaviour required that known length text fields needed to be scanned if terminating syntax was in scope so last week's proposal was not correct.
AP/SH to write up description of speculative parsing, scanning, escaping text fields.

Need to discuss if comment escapes should be supported.

4. Calendar/Number formats

AP raised question about whether locale or specific properties should be used to define properties such as decimalseparator in numberFormat and langauge in calendarFormat. Decided that specific properties should be used  as it gave more control and didn't require users to 'find' the correct locale for a format.

4. AOB
Next call 11 February 14:00

Meeting closed, 15:00 GMT


Actions raised at this meeting
No
Action
031
DG: Review dfdl v033

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 properies
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
29/1: AP and SH to talk to Sandy Gao
04/02 Call arranged for Friday
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.
026
SH: Envelopes and Payloads
027
Property precedence tables
028
Variable markup
029
 valueCalc (output length calculation)

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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