Wendell Piez <wapiez(_at_)mulberrytech(_dot_)com> 22:16 26 March 2009 >>>
Alan,
At 04:44 PM 3/26/2009, you wrote:
Out of interest (and to facilitate further understanding) would you
be kind enough to illustrate how you would approach my filtering
problem with template matching rather than with xsl:choose?
It's likely that you could inspire a small friendly competition along
those lines, but might you post a small sample of input data, with a
prose spec and/or sample of desired results, to encourage those who
might be inclined to try their hand?
*----------------------------------------------------------------------------------------------------------
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_status' and
ExtendedData/Data/value='Endangered']">
<xsl:value-of select="@id" />,
<xsl:value-of select="name" />,
<xsl:value-of
select="ExtendedData/Data[(_at_)name='location_name']/value"/>,
<xsl:value-of
select="ExtendedData/Data[(_at_)name='grid_ref']/value"/>,
<xsl:value-of
select="ExtendedData/Data[(_at_)name='rdb_status']/value"/>,
<xsl:value-of
select="ExtendedData/Data[(_at_)name='last_seen']/value"/>,
<br/>
</xsl:for-each>
</xsl:template>
the <xsl:for-each> element being the most significant in the context of
this problem.
(Getting the syntax correct for the Data(_at_)name attribute threw me at
first).
This is probably trivial for many but I big leap forward in
understanding for me. Thanks again.
Alan Hale
Aberystwyth
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