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Michael Kay wrote:
> Yes, I think so. Something like XML Schema uniqueness and referential
> constraints applied over a document collection. I'm not entirely sure that
> the RDBMS approach of modelling relationships only as constraints is ideal -
> for example there can be a relationship even when there is no constraint -
> but it's a start.
Yes, but it would be nice if we didn't need to explicitly add
uniqueness/constraint elements. After all, the ref attribute of the <element>
element is a link as well. Which brings us back to the perma-thread about IDs
and IDREFs without ID and IDREF attributes.