Stanimir Stamenkov wrote:
> /Andrew Paterson/:
[snip]
> > it ignores the minOccurs="1" attribute on the group 
> > reference and allows the elements to be omitted.
> 
> Nothing is ignored but both definitions are effectively the same - 
> see "Schema Component Constraint: Effective Total Range (all and 
> sequence)" <http://www.w3.org/TR/xmlschema-1/#cos-seq-range>.

Many thanks for explaining that. I must confess that I often find
standards documents hard to read but your explanation has really
clarified it for me. 

Note: I came to XML from EDI where mandatory composites with all
elements optional are fairly common and have the obvious meaning.

I must say that I am glad that there are only two elements in the group
- if there were a lot of elements, it would require a long and
complicated "choice" structure to represent it!

Thanks again,
Andrew

All opinions are completely my own - after all, who else would want to
take credit for them?

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