A question about context for ancestor::*
Monday, 22 June 2015 · 2 messages
FB
France Baril22 Jun 2015 05:23 #
In the following example, both $yo and $yo2 are obtained in the context of
$all, but $yo2 is interpreted in the context of $t2b.
let $t2a := <topic><title id="yo">2.1</title></topic>
let $t2b := db:open('test')/*[@id='topic']
let $all := <map><title>Map</title>{$t2a}{$t2b}</map>
let $yo := $all//*[@id='yo']
let $yo2 := $all//*[@id='yo2']
return ($all, count($yo/ancestor::*), count($yo2/ancestor::*))returns
<map>
<title>Map</title>
<topic>
<title id="yo">2.1</title>
</topic>
<topic id="topic">
<title id="yo2">2.2</title>
</topic>
</map>
2
1I would have expected both ancestor::* clauses to return 2. If I ask for the last ancestor of $yo2, I get <topic id="topic">, again wrong context.
The only way for me to force $yo2 to pick the node from the context of $all
is to create a copy of $all, and then work from the copy.Why would yo get into context, but not yo2?
CG
Christian Grün22 Jun 2015 09:34 #
What is stored in your test database?
Quoted text · France Baril · 35 lines
On Mon, Jun 22, 2015 at 3:22 AM, France Baril <france.baril at architextus.com> wrote: > In the following example, both $yo and $yo2 are obtained in the context of > $all, but $yo2 is interpreted in the context of $t2b. > > let $t2a := <topic><title id="yo">2.1</title></topic> > let $t2b := db:open('test')/*[@id='topic'] > let $all := <map><title>Map</title>{$t2a}{$t2b}</map> > let $yo := $all//*[@id='yo'] > let $yo2 := $all//*[@id='yo2'] > return ($all, count($yo/ancestor::*), count($yo2/ancestor::*)) > > returns > > <map> > <title>Map</title> > <topic> > <title id="yo">2.1</title> > </topic> > <topic id="topic"> > <title id="yo2">2.2</title> > </topic> > </map> > 2 > 1 > > I would have expected both ancestor::* clauses to return 2. If I ask for the > last ancestor of $yo2, I get <topic id="topic">, again wrong context. > > The only way for me to force $yo2 to pick the node from the context of $all > is to create a copy of $all, and then work from the copy. > > Why would yo get into context, but not yo2? > >
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