[DFDL-WG] DFDL: Minutes from OGF WG call, 04 February 2009

[Alan Powell]

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 at uk.ibm.com 
 Tel: +44 (0)1962 815073                  Fax: +44 (0)1962 816898






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