Re: keys and data files

Actually, being new to xslt it was discovering that one could change the current
node to some imported document that was what surprised me that it actually worked.
What I did was:

input file:
<?xml version="1.0" encoding="UTF-8"?>
<SomeTag>
    <SomeOtherTag id="33322"/>
    <SomeOtherTag id="23492342"/>
</SomeTag>

testdata.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<!-- file: testdata.xml -->
<people>
    <person id="33322">
        <name>
            <first>tom</first>
            <last>jones</last>
        </name>
        <email>tjones@xxxxxxxxx</email>
    </person>
    <person id="23492342">
        <name>
            <first>john</first>
            <last>donne</last>
        </name>
        <email>jdonne@xxxxxxxxxxxx</email>
    </person>
    <person id="323423">
        <name>
            <first>frank</first>
            <last>wright</last>
        </name>
        <email>fwright@xxxxxxxxxxxxxxxxxxx</email>
    </person>
</people>

processing file:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
        version="1.0"
        xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
        xmlns:xalan="http://xml.apache.org/xslt"
        >

<xsl:key name="nv" match="people/person" use="@id"/>

<xsl:template match="SomeTag">
    <xsl:for-each select="child::SomeOtherTag">
        <xsl:variable name="id" select="@id"/>
        <xsl:for-each select="document('testdata.xml')">
            <xsl:variable name="node" select="key('nv', $id)"/>
<OUT>
Hi <xsl:value-of select="$node/name/first"/>,
Is "<xsl:value-of select="$node/email"/>" your email?
</OUT>
        </xsl:for-each>
    </xsl:for-each>
</xsl:template>
</xsl:stylesheet>

I was interested in a datastructure lookup capability. I originally had all the
data in a template using choose/when's for each type of data (first name, last
name, etc.) and yesterday morning I decided that there had to be a better
(object-oriented, group all the data together) way of doing it. Thus I came up
with the data structure lookup. (Of course I was not looking up first names, etc, but
rather xmlschema base and derived type information required for processing
xmlschema file converting the types to java classes).

I am cross posting to the xsl mailing list so that others can see the generality of
the "lookup table" technique; it can be used to lookup any static data as well as
markup instructions.

Richard



Dimitre Novatchev wrote:

> Richard,
>
> > I just joined the mailing list this morning. What was the "lookup" stylesheet?
>
> See:
>
> http://sources.redhat.com/ml/xsl-list/2001-06/msg01004.html
>
> and
>
> http://sources.redhat.com/ml/xsl-list/2001-06/msg01063.html
>
> The latter has a decent explanation "why this code works".

..........................


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