[DFDL-WG] DFDL: Minutes from OGF WG call, 26 November 2008

[Alan Powell]

Open Grid Forum: Data Format Description Language Working Group

Weekly Working Group Conference Call
13:00 GMT, 26 November 2008


Attendees

Steve Hanson (IBM)
Mike Beckerle(Oco)
Alan Powell (IBM)

1. Moving to XSD 1.1 as base for DFDL
Continued discussion on benefit of moving to XSD 1.1
 
Discussed XSD assert and XPATH
Restrictions
- Only on complex types
- Path steps are restricted to only match information items within the 
element being ·assessed·. 

Decided XSD 1.1 assert cannot replace dfdl:assert as it occurs in more 
places and has more function
Decided not to rename dfdl:assert even though it is similar to xsd:assert 
as it properly describes function

XSD 1.1 assert  is for validation only and has no effect on dfdl parsing 
and unparsing.

MB to investigate whether dfdl variables can be used to allow dfdl xpath 
paths to be restricted in the same way as XDS 1.1 as part of the existing 
variable action item.

2. Action Items/ Work Items.
Actions
003/018 padding to minlength - discussed WTX response and AP to 
investigate adding dfdl:minlength

Work items
013 Scoping rules.  Reviewed current description in spec and agreed 
section on overriding should be deleted.

3. AOB
Next call 3 December

Meeting closed, 13:15 GMT



Actions raised at this meeting

No
Action 
















Current Actions:
No
Action 
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
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
018
AP: Agree padding to minimum length
15/10: Needs documenting
22/10: No update
26/11: discussed and AP to suggest dfdl:minlength
020
SH: Resolve packedDecimalSignCodes behaviour depends on NumberCheckPolicy 
22/10: No progress
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)





Closed actions:


















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/Alan) - 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) - 
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
complete
014
(from F2F) Occurs, OccurSeparator changes 
complete
015
(from F2F) choices and Output (Mike)

016
(from F2F) xpath forward references (Alan)  
complete
017
(IBM WTX review) Minor agreed updates (Alan)  
complete
018
(IBM WTX review) Review generateNewLine (Alan)  
complete
020
(IBM WTX review) Special value for zero seen eg 'zero'. (Steve) 
complete
021
(IBM WTX review) 'EndOfData' changes (Alan)

022
(IBM WTX review) Unresolvable choices - infoset changes  
complete
023
(IBM WTX review) separatorKind=?prefix? ?infix? or ?postfix? 
complete
024
(IBM WTX review)  StopValue clarification (Alan) 
complete
025
Augmented infoset and unparsing (Alan) 

026
Hidden changes
complete
027
Add decimal supp to main spec 
complete
028
Remove extended floats 
complete
029
AP: enum + expression wording 
complete
030
All: Document new EndOfData changes 

031
AP: Document defineTextNumber etc 
complete
032
AP: Document textNumberRepresenation and binaryNumberRepresentation 
complete
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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