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@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