Hi Alex,
thanks for your answer!
Am 26.03.2013 um 18:43 schrieb Alexander Holupirek alexander.holupirek@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