[xquery-talk] search mechanism

[Peter Mueller]

Hello together,

I am quite new to XQuery and could need some expert opinion.

I am trying to implement a search mechanism like those in library systems
where you can combine several queries with AND/OR-operators (for instance
search for search_term1 in the titles AND search_term2 in the abstracts and
so on ...

So far I have been performing the following steps:

1) done several queries separately like the following:

for $doc in //text/abstract
&= 'search_string' 
return xs:string($doc/ancestor::text/@id)

2) stored the IDs of the documents in Java-Hashtables (one for each query)

3) combined these ID-Hashtables according to the operators set by the users

4) then searched the documents that belong to the accumulated IDs with the
following query:

for $doc in //text[@id='id1'] | //text[@id='id2'] ...
order by fn:year-from-date($doc//date)
descending return $doc

This does work but seems rather complicated to me! 
What do you think? 
I would think that it should be possible (and better?) to do this entirely
in one single XQuery ...?


Second, I only want to show the first 10 hits to the user and generate links
( [11-20] [21-30] etc.) to allow accessing the rest.

So far I am thinking about storing the start- and stop-position plus all (up
to 4 queries) that have led to the results with each link.

Again, this seems rather complicated to me, but I can't think of anything
else. Do you have any suggestions for me?

Thanks for every hint!

Ciao,
Peter

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