Hi Alex,
thanks for your answer!
Am 26.03.2013 um 18:43 schrieb Alexander Holupirek
<alexander.holupi...@uni-konstanz.de>
:
>
> if I got you right you want to evaluate a query, such as
>
> ft:mark(<p>bey welchen die Verbesserungen durch Johann Ballhorn öfter
> vorkommen als man glauben sollte.</p>[./text() contains text ('Johann' ftand
> 'Ballhorn') distance at most 5 words ordered][self::*:p or self::*:q])
>
> which you construct from your collection?
>
> <p>bey welchen ...</p> is a database node and
> <q>[text() contains text ('Johann' ... ]</q> holds a query predicate as string
>
> So you dynamically construct a query string that you like to evaluate?
I already have the complete query stored in the very same collection
> ==
>
> Since ft:mark() operates on database nodes a simply typing
>
> ft:mark(<p>bey welchen die Verbesserungen durch Johann Ballhorn öfter
> vorkommen als man glauben sollte.</p>[./text() contains text ('Johann' ftand
> 'Ballhorn') distance at most 5 words ordered][self::*:p or self::*:q])
>
> in BaseXGUi results in
>
> [BXDB0001] ft:mark(element p { ("bey welchen die Verbesserungen durch Johann
> Ballhorn öfter vorkommen als man glauben sollte.") }[text() contains text
> ("Johann" ftand "Ballhorn") ordered distance(0-5 word)][(self::*:p or
> self::*:q)]): database node expected.
Yes, I tried this :)
[…]
> let $in := doc('cm')
> let $p := $in//p
> let $q := $in//q
> let $qs := concat('ft:mark($p', $q, ')')
> return
> xquery:eval($qs)
>
> evaluates the query string ... aehh .. tries to evaluate the query string
>
> [XPST0008] Undefined variable $p.
And also this.
>
> http://docs.basex.org/wiki/XQuery_Module#xquery:eval shows how to pass a
> binding of into the query to be evaluated
>
> let $in := doc('cm')
> let $p := $in//p
> let $q := $in//q
> let $qs := concat('ft:mark($binding', $q, ')')
> let $bm := map{ '$binding' := $p }
> return
> xquery:eval($qs, $bm)
>
> constructs a query string
>
> ft:mark($binding[text() contains text ('Johann' ftand 'Ballhorn') distance at
> most 5 words ordered][self::*:p or self::*:q])
> and a binding of $binding and
>
> results in
>
> <p>bey welchen die Verbesserungen durch <mark>Johann</mark>
> <mark>Ballhorn</mark> öfter vorkommen als man glauben sollte.</p>
>
> Which, I hope, is the result you wanted to achieve.
OK, I now have this:
for $i at $p in //entry
let $q := $i/q
let $text := if ($i/p) then $i/p else $i/l
let $ft := concat("ft:mark($binding", $q,")")
let $bm := map{'$binding' := $text}
return xquery:eval($ft, $bm)
The if clause allows to skip the extension "[self::*:p or self::*:q]" of the
query.
Thanks for your help!
Cerstin
--
Dr. phil. Cerstin Mahlow
Universität Basel
Departement Sprach- und Literaturwissenschaften
Fachbereich Deutsche Sprach- und Literaturwissenschaft
Nadelberg 4
4051 Basel
Schweiz
Tel: +41 61 267 07 65
Fax: +41 61 267 34 40
Mail: cerstin.mah...@unibas.ch
Web: http://www.oldphras.net
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