[DFDL-WG] DFDL: Minutes from OGF WG call, 15 October 2008

[Alan Powell]

Open Grid Forum: Data Format Description Language Working Group

Weekly Working Group Conference Call
13:00 GMT, 15 October 2008


Attendees
Mike Beckerle (Oco)
Alan Powell (IBM)

Apologies
Steve Hanson (IBM)


1. Decimal Supplement
 
MB had reviewed last weeks proposal. Did not like scoping rules which are 
different from normal scoping rules. Agreed to not allow in-line syntax so 
no need for scoping rules.


2.Unordered Choice infoset order

Previous call had decided infoset should be in order of data. SH pointed 
out that validation will fail unless sequenced data is in schema order. 
Agreed to change back to schema order. Document that data order can be 
achieved using an array of choice.
Discussed changing to Schema 1.1 for updated syntax of xs:all which 
provides erquired syntax. Felt that is was too late to change now but IBM 
will talk to Sandy Gao to assess impact.
3. Selectors

Discussed SKK's  note and SH reply.
Suggest simple syntax where ONE of the format statement on an item is 
used. Format which  matching the selector will be be used otherwise if 
NONEof the format selectors match,  the format with NO selector specified 
will be used.

To be consistent ony ONE format statement will be allowed in a 
defineFormat.

4. Padding
Agreed to restrict padding to string text variable length with minlength 
facet. No need for an extra property.

4. AOB

Will discuss End of Data next week

Next call  22st Oct 

AP will be away for the next 2 weeks.

Meeting closed, 13:45 GMT


Actions raised at this meeting

No
Action 
022
SH: Talk to Sandy Gao to asses use of schema 1.1






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 excpet minlength
004
MB: Mike will also author a new section in response to comments from Sandy 
Gao and Suman Kalia, explicitly connecting syntax with DFDL semantics
16/7: no progress
10/9: Mike not convinced this is necessary. Steve to talk to Sandy to see 
if it is needed for any IBM implementation that extends the existing XML 
parsing framework
15/10: SH to talk to Sandy
006
SH: Distribute hidden proposal
16/7: Done. MB to review
13/8: MB to review
10/9: Mike has located this and will review
17/9: Proposal agreed

007
AP: enum + expression wording 
13/8: no progress
10/9: No update
17/9: No update
011
SH: Update decimal supplement
13/8: Editorial changes needed.
10/9: Alan to incorporate into main spec 
17/9: No update
15/10: spec updated. closed
012
??: Update decimalCalendarScheme
10/9: Not allocated yet
17/9: No update
24/9: add calendar binary formats to actions
013
MB: Description and use cases for EndofData syntax
10/9: Steve didn't receive this mail, he now has and will review
014
SH: Use cases for lengthKind pattern on binary fields.
10/9: Not done
17/9: No update
015
AP: removed extended floats
10/9: No update
17/9: No update
15/10: spec updated. closed
016
AP: add hidden changes to spec
017
All: Review EndOfData changes
018
AP: Agree padding to minimum length
15/10: agreed needs documenting
019
AP: document defineTextNumber etc
020
SH: resolve packedDecimalSignCodes behaviour depends on NumberCheckPolicy 
021
AP: Document textNumberRepresenation and binaryNumberRepresentation

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) - 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) - *complete but 
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
014
(from F2F) Occurs, OccurSeparator changes
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) 
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? (Alan) 
024
(IBM WTX review)  StopValue clarification (Alan) 
025
Augmented infoset and unparsing (Alan) 






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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