[DFDL-WG] Minutes for OGF DFDL Working Group Call, 17 November 2010
Alan Powell
alan_powell at uk.ibm.com
Thu Nov 18 06:03:17 CST 2010
Open Grid Forum: Data Format Description Language Working Group
OGF DFDL Working Group Call, 17 November 2010
Attendees
Stephanie Fetzer (IBM)
Steve Hanson (IBM)
Tim Kimber(IBM)
Bob McGrath (NCSA)
Alan Powell (IBM)
Suman Kalia (IBM)
Gary Sikora (Progeny)
Joe Futrelle (NCSA)
Apologies
1. Discuss with Gary Sikora the use of DFDL by OMG MARS IEF ITS
Gary gave us some background on how the standards process at OMG works in
practice. He described the status of the IEF work group and the RFI that
the DFDL WG had responded to. He suggested it would require direct support
from interested parties, such as members of the OGF DFDL WG, to have DFDL
adopted which would require a considerable commitment of time and
resource. Steve will contact the IBM OMG representative to discuss further
actions
2. Current Actions
Updated below.
3. AOB
Stephanie has discovered an incorrect statement in the description on
discriminators. Alan agreed that it was incorrect. Stephanie will
circulate to the WG
Meeting closed, 16:00
Next call Wednesday 24 November 2010 15:00 UK (10:00 ET)
Next action: 131
Actions raised at this meeting
No
Action
130
Use of DFDL by OMG MARS IEF ITS
17/11: Gary gave us some background on how the standards process at OMG
works in practice. He described the status of the IEF work group and the
RFI that the DFDL WG had responded to. He suggested it would require
direct support from interested parties, such as members of the OGF DFDL
WG, to have DFDL adopted which would require a considerable commitment of
time and resource. Steve will contact the IBM OMG representative to
discuss further actions
Current Actions:
No
Action
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
...
17/02: IBM is willing in principle to publish the test case format and
some of the test cases. May need some time to build a 'compliance suite'
24/03: No progress
03/03: Discussions have been taking place on the subset of tests that will
be provided.
10/03: work is progressing
17/03: work is progressing
31/03: work is progressing
14/04: And XML test case format has been defined and is being tested.
21/04. Schema for TDML defined. Need to define how this and the test cases
will be made public
05/05: Work still progressing
12/05: Work still progressing
02/06: Work still progressing on technical and legal considerations
...
25/08: Will chase to allow Daffodil access to test cases. The WG should
define how implementation confirm that they 'conform to DFDL v1'
01/09: IBM still progressing the legal aspect. Intends to publish 100 or
so tests as soon as it can, ahead of a full compliance suite.
08/09: IBM still progressing
15/09: IBM still progressing, expect tests to be available within a few
weeks
22/09: IBM still progressing, expect tests to be available within a few
weeks
29/09:Test cases are being prepared.
06/10: Some test cases should be available next week. Steve would like to
be able to show the test case information at OGF 30.
13/10: Still progressing
10/11: Legal issues cleared, IBM in process of collecting 100 example test
cases, ideally ones that fit the 'extended conformance' of NCSA Daffodil
17/11: Work is progressing on verifying the test cases. It should be
possible to distribute to the WG in 2 weeks.
111
Daffodil DFDL parser
11/08: Bob and Alejandro described the new implementation that they have
developed. It is a new code base and is not based on the Deffudle
prototype. It is written in scala and implements approximately 80% of the
features in the public comments draft of DFDL V1. Alejandro will send a
list of the features not implemented.
We discussed the scenarios that motivated the development which was to
extract data from various sources and transform into canonical formats.
Bob offered to make Daffodil available for the WG to assess the
functionality. IBM WG members will get approval the company to allow them
to receive Daffodil.
Bob raised the question that if Daffodil becomes the public implementation
of DFDL then we will need to work out how that would be funded and
managed.
It would be helpful if IBM test cases were available to Daffodil. IBM will
investigate
25/08: Alejandro had sent a list of the functions that he has implemented
and Steve ahd responding indicating the extra functions he thought were
essential.
Since then Alejandro has implemented some of the missing functions, such
as escape schemes, pre-defined variables, binary decimal numbers, etc, and
will update his list.
Bob is planning to make the parser available on the internet to allow
testing.
His organisation is being reorganised and he doesn't know what the
priority of Daffodill will be so it is essential that we move quickly. It
would help if IBM could indicate its support for Daffodil in some
semi-formal way.
01/09: Alejandro updating Daffodil to include escape schemes, unordered
sequences and ignoreCase.
Daffodil being placed under formal source control in anticipation of
external release.
Bob has a start October deadline to create a report on what has been done
for his sponsors.
It would be great if we could get Daffodil on the web and have run some
IBM tests so it could be highlighted at OGF 30 at end October.
08/09: Alejandro is marking up Spec draft 42 to indicate which features
Daffodil implement. Bob expects Daffodil to be available on the web soon.
15/09: Alejandro had indicated in the specification which functions were
implemented in Daffodill. Steve had reviewed and identified which function
need to be implemented and which could be considered optional (see action
099). Alejandro is implementing the missing core functions. There was some
discussion about the limitations on unordered groups. (stop value and
expression not supported). It was agreed that it should be a schema
definition error if dfdl:occursCountKind is 'stopValue' on any element
within an unordered sequence and a floating element.
22/09: not discussed
29/09: not discussed
06/10: Alejandro has left NCSA. Bob is making the case for continuing and
having a replacement. Bob to agree with Steve what can be said at OGF30.
13/10: Bob still progressing project funding and making Daffodil
publically available.
10/11: NCSA internal & sponsor (US National Archive in Washington DC -
Electronic Records Administration) reviews passed. NCSA have new resource
allocated - Joe Futrelle. Bob has started open source paperwork. ETA end
December.
17/11: Joe has started coming up to speed with Daffodil. Bob is waiting
for signoff from the university to open source the code.
112
DFDL certification process
25/08: Discussed how to certify DFDL implementations. Alan to investigate
if OGF have a defined process.
01/09: In progress, spec needs to state what conformance means, as part of
this work
08/09: Discussed what needs to be said in the spec and agreed that details
of a conformance test suite should be in another document.
Alan to draft conformance section.
15/09: Alan had look at the conformance sections in XML and Schema
specifications both of which indicate sections which must be implemented.
None just say 'execute the test suite'. They talk in terms of conformance
of document, schema and processors..
22/09: no progress
22/09: Alan has added short Conformance and Optional Features sections to
spec which was briefly discussed. Discussed naming for processors that
don't implement optional features and those that implement all features.
06/10: Need to decide what/how test cases and certification process should
occur
13/10: no progress
10/11: no progress
17/11: no progress
123
DFDL tutorial
13/10: Draft of first 3 chapters has been written and will be distributed
to WG
10/11: Posted to grid forge here (
http://forge.gridforum.org/sf/go/doc16106?nav=1), work continuing at IBM
to define a standard example-based chapter framework and to author
additional chapters. Contributors welcome!
17/11: Steve, Stephanie and Alan had a meeting to discuss the best
structure for the tutorial and decide which examples to use throughout.
The meeting raised more questions. Further discussions will be held.
124
DFDL web content on OGF standards pages
13/10: no progress
10/11: no progress
17/11: Alan has looked at the OGF web pages and there aren't many
standards listed. Some of the links point to very short primers rather
than the specification
129
Press release to publicise DFDL
Steve is pulling together a press release at IBM. Want to include as many
contributors and interested parties as possible.NCSA are keen to be
included. Also likely that US National Archive will want to be included.
Mike has indicated OCO are too.
17/11: no progress
130
Use of DFDL by OMG MARS IEF ITS
17/11: Gary gave us some background on how the standards process at OMG
works in practice. He described the status of the IEF work group and the
RFI that the DFDL WG had responded to. He suggested it would require
direct support from interested parties, such as members of the OGF DFDL
WG, to have DFDL adopted which would require a considerable commitment of
time and resource. Steve will contact the IBM OMG representative to
discuss further actions
Closed actions
No
Action
Work items:
No
Item
target version
status
042
Mapping of the DFDL infoset to XDM
none
not required for V1 specification
070
Write DFDL primer
071
Write test cases.
Regards
Alan Powell
Development - MQSeries, Message Broker, ESB
IBM Software Group, Application and Integration Middleware Software
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