I am trying to use XSLT to process one XML file, which refers to data in
another, and I am having trouble with getting a filter to work.
The first source file (device.xml) - the one that is actually processed by the
XSL - has entries like this:
<device-description>
<device-value>
<base-name>PollNow</base-name>
<name>Poll Now</name>
<type>Action</type>
</device-value>
<device-value>
<base-name>StartupPollNow</base-name>
<name>Startup Poll Now</name>
<type>Action</type>
</device-value>
<device-value>
<base-name>Ping</base-name>
<name>Ping</name>
<type minimum-length="0" maximum-length="256" >String</type>
</device-value>
</device-description>
One of the templates is approximately as follows:
<x:template match="type[text()='Action']" >
<!-- do basic action. -->
</x:template>
This quite happily matches all the <device_name> elements where the <type> has
a text value pf "Action".
However, I have a second XML file (device-3.xml) which contains some data that
I wish to use to modify the behaviour of the transform. It has entries like
this:
<device-description>
<param name="PollNow" standard="no" >
<name>Poll Now</name>
<description>normal poll</description>
</param>
<param name="StartupPollNow" standard="no" >
<name>Startup Poll Now</name>
<description>startup poll</description>
</param>
<param name="Ping">
<name>Ping</name>
<description>Ping-Pong</description>
</param>
</device-description>
The second file is accessed via a variable, as follows:
<x:variable name="data" select="document($in-file-3)"/>
What I want to achieve is that for all <type> elements where there is a
corresponding <param> where base-name is the same as param/@name, I want a
different action.
The additional template I have for this is currently as follows
<x:template
match="type[text()='Action'][$data/device-description/param[@name=../base-name/text()]/@standard='no')]
" >
<!-- do different action. -->
</x:template>
My thinking is that the first filter is as with the first template I listed,
matching all <type> elements whose text is "Action".
The second filter should then enable me to pick the right param from the second
file, and do something based on the value of its @standard.
Maybe once I'm in the second filter I am causing confusion as to which element
the @name refers to (which should be the param) and which the ../base-name is
relative to (the device-value/type)?
Can I do all this within a single template's @match ? Or am I making it too
complicated. In which case how might I get the result I'm looking for?
Appreciatively,
Richard.
The examples are all slightly simplified from the real data, which has more
elements, and the transforms are in a mode.
Richard Kerry
BNCS Engineer, SI SOL Telco & Media Vertical Practice
T: +44 (0)20 3618 2669
M: +44 (0)7812 325518
4 Triton Square, Regent’s Place, London NW1 3HG
richard(_dot_)kerry(_at_)atos(_dot_)net<https://webmail.siemens-it-solutions.com/owa/redir.aspx?C=9fb20d019e3e4cb99344d708709a3177&URL=mailto%3arichard.kerry%40atos.net>
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