Open Grid Forum: Data Format Description Language Working Group OGF DFDL Working Group Call, October 13 2010 Attendees Stephanie Fetzer (IBM) Steve Hanson (IBM) Alan Powell (IBM) Suman Kalia (IBM) Bob McGrath (National Center for Supercomputing Applications) Apologies Mike Beckerle (Oco) Tim Kimber(IBM) 1. Current Actions Updated Below 2. Draft 43 comments from Steve and Suman 13/10: We went through Steve's many comments and issues. Issues: - p32 6.3 Enumerations do not specify a type that an expression should returns. Most are strings but some are ints. Will state that enums are strings unless otherwise stated. - p 43 7.3.1 Changed the testValueKind to testKind so it covers attributes as well as value. - p60 9.2 Will include prefixLength in leftElementFraming - p62 11 UTF16Width becomes utf16Width and applies when UTF-16, UTF-16BE/LE and their CCSID equivalents. - p68 12.2 Is is not a schema definition error when emptyValueDelimiterPolicy 'initiator'/'both' and lengthKind 'implicit' for complex elements. -p85 13.2.1 generateEscape really only applies to escape blocks so could be renamed. -p111 13.16 nilValue literalCharacter. If not fixed length how many should be output? Steve to check what MRM does. - p126 17. Remove inputValueCalc/outputValueCalc from simpleType 3. dfdl:roundingIncrement Problems with rounding and ICU 13/10: not discussed 4. Support for COBOL type PIC 99V99 COMP The dfdl:binaryDecimalVirtualPoint property should cover 'packed', 'bcd' and 'binary'. 13/10: To support this COBOL type need to allow xs:decimal to have binaryNumberRep 'binary' and apply dfdl:binaryDecimalVirtualPoint 5. AOB - Is support for locales sufficient? 13/10: not discussed Meeting closed, 16:45 Next call Wednesday 20 October 2010 15:00 UK (10:00 ET) Next action: 129 Actions raised at this meeting No Action 125 -p111 13.16 nilValue literalCharacter. If not fixed length how many should be output? Steve to check what MRM does. 126 -p85 13.2.1 generateEscape really only applies to escape blocks so could be renamed. 127 3. dfdl:roundingIncrement Problems with rounding and ICU 13/10: not discussed 128 5. AOB - Is support for locales sufficient? 13/10: not discussed 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 085 ALL: publicise Public comments phase to ensure a good review.. 14/04: see minutes 21/04: Press release, OMG and other standards bodies. 05/05: Alan and Steve H have contacted other standards bodies. Will ask them to add comments on spec 15/05: still no public comments 02/06: No public comments 16/06: Public comments period has ended with no external comments. Alan had posted changes made in draft 041. Steve suggested send a note to the WG highlighting these changes. Steve also suggested requesting an extension as other IBM groups may review. We discussed whether this was necessary as changes will need to be made during the implementation phase anyway. Alan to ask OGF what the process is for changes post public comment. 23/06: Still no comments. Alan will contact OGF to understand the rest of the process. 30/06: Alan has emailed Joel asking what the process is now public comment period is over and can we update the published version with WG updates. No response yet. 07/07: No response. Alan will chase up 14/07: No response from Joel. Sent email to Greg Newby by no response. 21/07: Still no response. 04/08: Joel has responded that it is up to the WG to decide if the changes are significant enough to need additional review. Alan to contact David Martin and Erwin Laure for guidance if we split the specification. 11/08: Received a response from Joel that the WG can decide if a re- public review is necessary before becoming a 'proposed recommendation'. Alan responded that the WG agreed that a re-review was not necessary. The next stage is for OGF review committee to approve publication. 11/08: Specification is now 'awaiting author changes' before being submitted to the OGF technical committee for approval as a 'proposed specification'. Alan would like to have the updated specification complete by Sept 10th. The WG needs to complete all actions by then or decide that they do not need to be included in this phase of the process. 01/09: Alan and Steve have discussed and propose Sept 30th for completion of draft 43 and closure of all actions. 08/09: Target for completion September 30. 15/09: as above 22/09: as above 29/09: Draft 43 will be published this week for WG review prior to submitting to OGF 06/10: Draft 43 was distributed on 30 September and includes all outstanding work items. This will be the last draft before submission to OGF for the final committee review. All comments should be sent to Alan by Tuesday 12th Oct and final version will be submitted on Friday 15th. 13/10: Thorough review by Steve and comments from Suman and Stephanie. Most updates done. Final review draft will be issued 14th Oct and final version to OGF soon after. 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 progressin project funding and making Daffodil publically available. 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 123 DFDL tutorial 13/10: Draft of first 3 chapters has been written and will be distributed to WG 124 DFDL web content on OGF standards pages 13/10: no progress 125 -p111 13.16 nilValue literalCharacter. If not fixed length how many should be output? Steve to check what MRM does. 126 -p85 13.2.1 generateEscape really only applies to escape blocks so could be renamed. 127 3. dfdl:roundingIncrement Problems with rounding and ICU 13/10: not discussed 128 5. AOB - Is support for locales sufficient? 13/10: not discussed Closed actions No Action 114 OGF 30 25/08: OGF30 takes place on October 25-29 in Brussels. Should we have a WG session? 09/01: Given emergence of NCSA implementation and spec completion target of 30th Sept it makes sense to host a session at OGF 30. 08/09: Steve to request permission to go 15/09: Travel request has be submitted 22/09: DFDL session is scheduled at 11:00am Monday Oct 25th. 06/10: Steve has approval to travel. 13/10: Closed Work items: No Item target version status 005 Improvements on property descriptions not started 012 Reordering the properties discussion: move representation earlier, improve flow of topics not started 036 Update dfdl schema with change properties ongoing 042 Mapping of the DFDL infoset to XDM none not required for V1 specification 070 Write DFDL primer 071 Write test cases. 083 Implement RFC2116 Regards Alan Powell Development - MQSeries, Message Broker, ESB IBM Software Group, Application and Integration Middleware Software ------------------------------------------------------------------------------------------------------------------------------------------- IBM MP211, Hursley Park Hursley, SO21 2JN United Kingdom Phone: +44-1962-815073 e-mail: alan_powell@uk.ibm.com Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. 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