On Tue, Jun 01, 2004 at 06:11:05PM +0200, Stefan Lischke wrote:
> btw. is there any research about tmql containment problem (if the result
> of tmql query A is a superset of the result of another tmql query B,
> then query A contains query B)
Stefan,
As far as TMQL is concerned, our current plan is to support output in
the form of
- lists of tuples (like in good'n'old SQL),
- XML documents (actually infoset structures) like good'n'new XQuery, and
- TM instances like ??? (hey, something new :-)
Containment for lists of tuples can be defined rather natural. I am
not sure about a containment in XML (subtrees?), there could be many
ways to define this.
For TM output, we would have to define finally what 'fragments' or
'submaps' are. Not a big deal, I guess once we have a formal model.
BTW: Anyone working (have worked) on this, please feel free to send me
a link; I think it is overdue to collect the approaches on a dedicated
page. I promise to republish this as TM!
\rho
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