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AW: XQuery frameworks

Hans-Juergen Rennau hrennau at yahoo.de
Tue Feb 2 09:53:32 PST 2010


 AW:  XQuery frameworks
Michael,

no doubt about the importance of XProc as an integration language above XQuery, and no doubt we need such a language which is not confined to orchestrating XQuery queries, but "application components in different languages", namely X...-components. I would position XProc two levels above XQuery, whereas an "XQuery-only integrator" would be only one level above. If we could afford only one single language above XQuery, the choice should certainly be the higher alternative, opening much larger space for integration. But remains the question: is there no need for additional integrators between the XQuery level and the XProc level? I believe that such integrators can be designed and could be useful. However, if the small-scale integration can be done in such a generic way as to deserve standardization - this is a different question. (To explore it, a first step might be to define possible advantages in general terms.) Lightweight-integration language
 between XQuery and XProc, is it possible, yes or no, is it worthwhile, yes or no?

With kind regards,
Hans-Juergen Rennau



----- Ursprüngliche Mail ----
Von: Michael Kay <http://x-query.com/mailman/listinfo/talk>
An: Hans-Juergen Rennau <http://x-query.com/mailman/listinfo/talk>; http://x-query.com/mailman/listinfo/talk
CC: http://x-query.com/mailman/listinfo/talk
Gesendet: Dienstag, den 2. Februar 2010, 5:58:30 Uhr
Betreff: RE:  XQuery frameworks

> 'extend standardization "beyond the query"' - that is an 
> excellent formula, I think! As one of the reasons why the 
> need is real I regard the challenge of data integration....
> 
> A movement "beyond the query": how about a processing model 
> just one level above the query level, of moderate complexity, 
> integrating the execution of single queries, for example by 
> assigning to them properties which would allow to automate 
> their squencing, input provision and output delivery? 

Some of this need is satisfied by XProc. There are some who would like to
see the whole application written in XQuery and don't want to see any other
language present. But to my mind, integration is often about combining and
reusing application components written in different languages and different
technologies, and XProc meets that need admirably.

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay 

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