Hi there,
My XSLT processor is Saxon v.9. I have an xml file of a list of
station names:
stations.xml:
<station_list>
<stations>
<station name="MONP">
<station name="MONP2">
<station name="PFO">
</stations>
<station_list>
In another xml file I have a series of values associated with a
particular station name (although now the tag is <datalogger>):
dataloggers.xml:
<dataloggerlist>
<datalogger name="MONP">
<con>sleeping</con>
<dlt>280594.003</dlt>
<rtm>-280553.133</rtm>
</datalogger>
<datalogger name="MONP2">
<con>sleeping</con>
<dlt>334455.003</dlt>
<rtm>-483940.133</rtm>
</datalogger>
<datalogger name="PFO">
<con>awake</con>
<dlt>111111.003</dlt>
<rtm>-222222.133</rtm>
</datalogger>
<dataloggerlist>
These are in turn defined in a third xml file (so my xsl processor can
convert more than one xml file at a time):
feeder.xml:
<?xml version="1.0" encoding="ISO-8859-1" ?>
<sources>
<source href="stations.xml" />
<source href="dataloggers.xml" />
</sources>
I want to combine them together so that the output looks like the code
below (Aside: I am aware that the station name could be retrieved from
datalogger.xml <datalogger name="XXX">, however I am retrieving a
whole suite of other information that is unique to stations.xml and
not pertinent to this issue):
output.xml:
<Placemark>
<name>MONP</name>
<con>sleeping</con>
<dlt>280594.003</dlt>
<rtm>-280553.133</rtm>
</Placemark>
<Placemark>
<name>MONP2</name>
<con>sleeping</con>
<dlt>334455.003</dlt>
<rtm>-483940.133</rtm>
</Placemark>
<Placemark>
<name>PFO</name>
<con>awake</con>
<dlt>111111.003</dlt>
<rtm>-222222.133</rtm>
</Placemark>
Where name is derived from stations.xml. To get the con, dlt and rtm
values from dataloggers.xml into output.xml I have done the following,
although I am not sure this is close to being right:
(1) Open up stations.xml, and using templates I get the value of the
station name into a variable called $thisSta
(2) Using the value of $thisSta, I then search for the datalogger tag
that has a name attribute that matches $thisSta.
(3) Now I have isolated the station I am interested in from
dataloggers.xml I want to grab some values (con, dlt, rtm).
snippet of convert.xsl where I am trying to achieve this:
<xsl:template match="station">
<Placemark>
<xsl:variable name="thisSta"><xsl:value-of select="@name" /></
xsl:variable>
<name><xsl:value-of select="$thisSta" /></name>
<xsl:template match="document( sources/source/@href, .)/
dataloggerlist/datalogger/@name=$thisSta">
<con><xsl:value-of select="con" /></con>
<dlt><xsl:value-of select="dlt" /></dlt>
<rtm><xsl:value-of select="rtm" /></rtm>
</xsl:template>
<Placemark>
</xsl:template>
When I try and process with Saxon, I get the following output:
Error at xsl:template on line 102 of file:convert.xsl:
XTSE0340: XSLT Pattern syntax error at char 0 on line 102 in
{document( sources}:
The only functions allowed in a pattern are id() and key()
The error is the second template match statement. I think I am pretty
close to getting this working, but I have run out of ideas. Can you do
what I am trying to achieve, or is my XPath expression syntax just
poorly written?
Thanks in advance,
- Rob
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