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How to create a combined xpath expression

Posted by Heinrich Götzger on
URL: https://discuss.orbeon.com/How-to-create-a-combined-xpath-expression-tp3027887.html

Hi,

I try to find a way to build a xpath-expression which will be created
within a repeat-loop dynamically during page creation. But this seems
not working for some reason.

The goal is to get a dynamic data structure displayed in a table.

An example of my xhtml-file is at the end of the mail.

Now I get a table like this (the second column ref is for testing only)
(not OK):

item: 1
label: Label A Label B Label C Label D ref: A value: 10
label: Label A Label B Label C Label D ref: B value: value B
label: Label A Label B Label C Label D ref: C value: C
item: 2
label: Label A Label B Label C Label D ref: A value: 10
label: Label A Label B Label C Label D ref: C value: C
label: Label A Label B Label C Label D ref: D value: value D

But I want a table like this
(OK):

item: 1
label: Label A value: 10
label: Label B value: value B
label: Label C value: C
item: 2
label: Label A value: 10
label: Label C value: C
label: Label D value: value D

I'm not sure how to write the xpath expression to get the desired label
from my labels-instance which matches the value-item in the table.

The construct for the label-column is not working as expected.
Why?

Where can I get more information on how to get this running?

How can I build the xpath from the fixed part 'instance('labels')/item'
and the changing part from the valueTag?

What I get is either _all_ labels at once or just the tag-name, but not
the text of my label-tag.

Thanks for ideas

Cheers

Heinrich

----8< ---- 8< ------
<?xml version="1.0" encoding="UTF-8"?>

<xhtml:html xmlns:xhtml="http://www.w3.org/1999/xhtml"
xmlns:xf="http://www.w3.org/2002/xforms"
xmlns:xxforms="http://orbeon.org/oxf/xml/xforms">

<xhtml:head>

<xf:model id="table-model">

<xf:instance id="content">
<document>
<items>
<item>
<A>10</A>
<B>value B</B>
<C>C</C>
</item>
<item>
<A>10</A>
<C>C</C>
<D>value D</D>
</item>
</items>
</document>
</xf:instance>

<xf:instance id="labels">
<items>
<A>Label A</A>
<B>Label B</B>
<C>Label C</C>
<D>Label D</D>
</items>
</xf:instance>

</xf:model>

</xhtml:head>

<xhtml:body>

<xf:group ref="instance('content')">
<xf:repeat nodeset="items/item" id="repeat-item">

<xhtml:table>

<xhtml:tr>
<xhtml:td>
<xf:output value="position()">
<xf:label>item: </xf:label>
</xf:output>
</xhtml:td>
</xhtml:tr>


<xhtml:tr>
<xhtml:td>

<xhtml:table width="600px" style="border: solid black 1px;">
<xf:repeat nodeset="./*[node()]" id="table-item">
<xxforms:variable model="table-model" name="valueTag"
select="name(.)" />
<xxforms:variable model="table-model" name="labelTag"
select="instance('labels')/item" />

<xhtml:tr>
<xhtml:td>

<xf:group ref="instance('labels')">

<xxforms:variable model="table-model" name="label"
select="instance('labels')/items/$valueTag" />

<xf:output select="$label/$valueTag">
<xf:label>label: </xf:label>
</xf:output>

<xf:output ref="$valueTag">
<xf:label>ref: </xf:label>
</xf:output>

</xf:group>
</xhtml:td>

<xhtml:td>
<xf:output select="$valueTag">
<xf:label>value: </xf:label>
</xf:output>
</xhtml:td>

</xhtml:tr>
</xf:repeat>
</xhtml:table>

</xhtml:td>
</xhtml:tr>

</xhtml:table>
</xf:repeat>
</xf:group>

</xhtml:body>

</xhtml:html>

----8< ---- 8< ------

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