[DFDL-WG] Agenda for OGF DFDL WG call 16 Decemberer 2009 - 13:00 UK (8:00 ET)

Tue Dec 15 10:37:34 CST 2009

1.        045  - Disciminators
Continued discussion of semantics of discriminators and arrays. Review 
Examples 

2.        Clarification of postfix separators, 
terminators,finalTerminatorCanBeMissing
Confirm Proposal: 
- Last 'postFix' separator is not optional 
- Terminators are mandatory. 
- dfdl:documentFinalTerminatorCanBeMissing - the last terminator in the 
data stream may be missing. Is only examined when processing the root 
element a global element is a child of xs:schema 
- dfdl:documentFinalSeparatorCanBeMissing - the last separator in the data 
stream may be missing.  Is only examined when processing the root element 
a global element is a child of xs:schema 

3.        Does the parser/serializer have to start on a global element? 
-  Confirm 
It was agreed that it would be helpful for tooling, importers, etc to know 
which elements are possible 'root' elements even though XML doesn't have 
this capability. 
A new property, dfdl:documentRoot,  will be defined that can only be on 
global elements. 
The property is optional, it does not prevent the DFDL processor from 
starting at any other element.
A DFDL processor or tooling may choose to optimise based on this property.

4. LengthKind = 'bits'
Review Mike's draft  

5. Semantics of length=0 
Should a field length of 0 , from expression or prefix for example, mean 
the element is present but length zero or not present?
Should occurrence be used to control existence and length to control 
length?

6. Go through remaining actions 

7. Draft 037 review
Agree terminology 

-A schema has components which have dfdl annotations 
.- Dfdl annotations have properties (attributes)
-The data/data stream/message has elements/fields 
-The infoset has items

8. Plan to finish DFDL v1 Schedule

Activity

Schedule
Who
Complete Action items 

             - 18 Dec 2009 
 WG 
Complete Spec 
Write up work items 
            ? 23 Dec 2009 
AP 
Restructure and complete specification 
              - 23 Dec 2009 
AP 
Issue Draft 038 
23 Dec 2009

WG review 
WG review 
7 Dec ? 08 Jan 2010 
WG 
Incorporate review comments 
4 Jan - 29 Jan 2010 
AP + 
Issue Draft 039 
15 Jan 2010

Incorporate review comments 
4 Jan - 29 Jan 2010 
AP + 
Issue Draft 040 
29 Jan 2010

Initial OGF Editor Review 
Initial Editor review 
1 Feb - 1 Mar 2010 
OGF 
Initial GFSG review 
1 Feb - 1 Mar 2010

Issue Draft 041 
1 Mar 2010

OGF Public Comment period (60 days) 

1 Mar - 30 Apr 2010 
OGF 
OGF 28 Munich 

15-19 March 2010 

Incorporate comments 
Incorporate comments 
28 May 2010

Issue Draft 042 
28 May 2010

Final OGF Editor Review 
Final  Editor review 
June  2010 
OGF 
final GFSG review 
June  2010

Issue Final specification 
30 June 2010

Publish proposed recommendation 

1 July 2010

Grid recommendation process 

1 Jan - 1 April 2011

Current Actions:
No
Action 

045
20/05 AP: Speculative Parsing
27/05: Psuedo code has been circulated. Review for next call
03/06: Comments received and will be incorporated
09/06: Progress but not discussed
17/06: Discussed briefly
24/06: No Progress
01/07: No Progress
15/07: No progress. MB not happy with the way the algorithm is documented, 
need to find a better way.
29/07: No Progress 
05/08: No Progress. Will document behaviour as a set of rules.
12/08: No Progress 
...
16/09: no progress
30/09: AP distributed proposal and others commented. Brief discussion AP 
to incorporate update and reissue
07/10: Updated proposal was discussed.Comments will be incorporated into 
the next version.
14/10: Alan to update proposal to include array scenario where minOccurs > 
0
21/10: Updated proposal reviewed
28/10: Updated proposal reviewed see minutes
04/11: Discussed semantics of disciminators on arrays. MB to produce 
examples
11/11: Absorbing action 033 into 045.  Maybe decorated discrminator kinds 
are needed after all. MB and SF to continue with examples. 
18/11: Went through WTX implementation of example. SF to gather more 
documentation about WTX discriminator rules.
25/11: Further discussion. Will get more WTX documentation. Need to 
confirm that no changes need to Resolving Uncertainty doc.
04/11: Further discussion about arrays.
09/12: Reviewed proposed discriminator semantic.
049
20/05 AP Built-in specification description and schemas
03/06: not discussed
24/06: No Progress
24/06: No Progress (hope to get these from test cases)
15/07: No progress. Once available, the examples in the spec should use 
the dfdl:defineFormat annotations they provide.
...
14/10: no progress
21/10: Discussed the real need for this being in the specification. It 
seemed that the main value is it define a schema location for downloading 
'known' defaults from the web. 
28/10: no progress
04/11: no progress
11/11: no update
18/11: no update
25/11: Agreed to try to produce for CSV and fixed formats
04/12: no update
09/12: no update
056
MB Resolve lengthUnits=bits including fillbytes
12/08: No Progress
...
28/10: no progress
04/11: MB to look at lengthUnits = bits
11/11: no update
18/11: no update
25/11: no update
04/12: no update. ALan will set up a separate call to progress this 
action.
09/12: no update. ALan will set up a separate call to progress this 
action.
064
MB/SH Request WG presentation at OGF 28
25/11: Session requested
04/12: no update
09/12: no update
066
Investigate format for defining test cases
25/11:IBM to see if it is possible to publish its test case format.
04/12: no update
09/12: no update

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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IBM United Kingdom Limited - Registered in England and Wales with number 
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