OK, I think I have worked this out (and in the process have
gained more understanding of what you and Michael have been
trying to explain).
To re-state: My XML (derived from KML) looks basically like this (some
editing):
<?xml version="1.0" encoding="UTF-8"?>
<kml>
<Document>
<Folder>
<name>Acer campestre</name>
<Placemark id="rpr_1">
<name>Acer campestre</name>
<ExtendedData>
<Data name="grid_ref">
<value>SN593798</value>
</Data>
<Data name="eng_name">
<value>Field Maple</value>
</Data>
<Data name="rdb_status">
<value>Lower risk - least
concern</value>
</Data>
<Data name="location_name">
<value>Penparcau</value>
</Data>
<Data name="last_seen">
<value>**/**/2000</value>
</Data>
</ExtendedData>
<Point>
<coordinates>-4.069436,52.398051,0</coordinates>
</Point>
</Placemark>
</Folder>
</Document>
</kml>
<Folder> and <Placemark> are repeated
I want to display (in csv format) the values of certain child
nodes of <Placemark> but (and this was the issue) in certain
circumstances I want to select out only data from Placemarks
where <Data name ='rdb_status'> and <Data/value='Endangered'>.
So, this is my solution now (avoiding using xsl:choose):
<xsl:template match="Folder">
<xsl:for-each
select="Placemark[ExtendedData/Data/attribute::name='rdb_statu
s' and ExtendedData/Data/value='Endangered']">
I suspect this still isn't quite right. I suspect you want rdb_status and
Endangered to be present together on the same Data element, whereas you are
selecting any Placemark that has some Data with @name='rdb_status' and some
Data (perhaps a different Data) with value='Endangered'. If I'm right, you
want:
<xsl:for-each select="Placemark[ExtendedData/Data[(_at_)name='rdb_status' and
value='Endangered']]">
Michael Kay
http://www.saxonica.com/
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