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Subject: Re: [ubl] Minutes of Atlantic UBL TC call 12 November 2008

At 2008-11-13 18:08 -0500, Jon Bosak wrote:
>    We reviewed and resolved substantive issues from MG and a few
>    from JB.
>    ACTION: JB to ask GKH why the word SHOULD is used in SSM19
>    instead of MUST as in SSM12.

Looks like it should be "MUST" to me, though this wasn't an issue of 
mine to start with.  As I recall the idea of the "schema header" is 
something formalized by the editors in an early version of the 
NDR.  I think perhaps my name came to mind because I recently 
questioned the worth of having it in the rules, and I thought we came 
to the conclusion it was unharmful.

This "schema header" formalism is simply a structured comment block, 
not something that could ever be validated by a schema tool ... I 
suppose one could write an arbitrary program to inspect the comment 
content and decipher content found therein.

Given this is a UBL invention and not a standardized schema 
construct, we get to make our own rules for it.  Would we want to 
judge a schema fragment non-conformant if the schema header were 
absent or somehow malformed?  I think it was decided the answer was 
"yes" because the NDR is directing the "model to schema" writer on 
what to put into the schema.

Therefore, would its absence in qDT be "normal"?  I think not, so to 
be consistent I think it should be "MUST" (must be "MUST"?).  But I'm 
soft on this because it is a UBL invention and not a standardized construct.

I hope this helps.

. . . . . . . . Ken

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G. Ken Holman                 mailto:gkholman@CraneSoftwrights.com
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