Open Grid Forum: Data Format Description Language Working Group

Weekly Working Group Conference Call
17:00 GMT, 12 Mar 2008

Attendees
Simon Parker (PolarLake)
Ian Parkinson (IBM)
Alan Powell (IBM)

Apologies
Mike Beckerle (Oco)
Steve Hanson (IBM)
Suman Kalia (IBM)

1. UML Descriptions of Schema Components

Followng recent reviews, Simon has distributed simplified versions of his schema component diagrams. This now uses a single diagram to describe the entire DFDL language. Concepts found in XML schema (XSD) are colored yellow, to distinguish from concepts that would not be found in XML schema, which are left white.

A second diagram is used to provide an informal overview of the language. Simon has updated this to use the same wording and style as the formal diagram, but suggested the group may prefer the existing diagram in the current DFDL specification draft.

Simon raised a question regarding the relationship of "Term" and "Particle" - his diagrams allow for a Term that is not part of a Particle, and he wondered whether this was correct. The diagrams are otherwise ready to drop into the specification, but Simon will distribute source files which can be edited in UMLet, in case any further changes are necessary.

2. Other business

As per his recent email to the DFDL-WG mailing list, Simon and PolarLake are stepping back from active participation in the DFDL working group, though Simon will continue to monitor the DFDL-WG mailing list informally. On behalf of the group, Alan thanked Simon for his participation, and confirmed that Simon and PolarLake would still like to be listed as contributors to the final draft of the DFDL specification.

Meeting closed, 17:25 GMT

Ian Parkinson
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