[DFDL-WG] Material for Call on 2007-10-24

[Mike Beckerle]

We had been reviewing the facets and default/null/optional a few weeks 
back.

I said I would make revisions as a number of people had objections.

Here are documents based on these comments.


Main things I did: (1) strict adherence to minOccurs and maxOccurs. No 
more notion that these are only for validity checking. 
(2) simple rule for default values: if it's required and there's a default 
value, then use the default value. This is for both input and output.

I put a bunch of work into illustrating the semantics of things like 
dfdl:separatorPolicy="suppress" and so forth. I had been trying to 
simplify this, but gave up. We're back to 3 policies here: keep, suppress, 
suppressAtEnd. I did figure out a way to express these via DFDL rewriting.

...mikeb

Mike Beckerle
STSM, Architect, Scalable Computing
IBM Software Group
Information Platform and Solutions
Westborough, MA 01581
direct: voice and FAX 508-599-7148
assistant: Pam Riordan 
                  priordan at us.ibm.com 
                  508-599-7046

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