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Re: How to construct an XPath expression for this node-set?

2003-08-06 21:43:27
Hi Tim,
  i am guessing your XML file may look like --

<Addresses>
   <Address addressID="100">
     <Name xml:lang="en">90 - Test Name</Name>
   </Address>
   <Address addressID="101">
     <Name xml:lang="en">93 - B</Name>
   </Address>
   <Address addressID="100">
     <Name xml:lang="en">91 - Another Name</Name>
   </Address>
   <Address addressID="101">
     <Name xml:lang="en">92 - A</Name>
   </Address>
</Addresses>

You can use xsl:key to achieve the result .. Below is
the complete XSL --

<?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/xalan";>
<xsl:output method="text" version="1.0"
encoding="UTF-8" indent="yes"/>

<xsl:key name="x" match="/Addresses/Address"
use="@addressID"/>
        
<xsl:template match="Addresses">
  <xsl:variable name="addr" select="key('x','100')"/> 
 

  <xsl:for-each select="xalan:nodeset($addr)">
    <xsl:value-of select="concat(@addressID, '-',
substring-before(Name, ' '))"/>
    <xsl:if test="position() != last()">
       <xsl:text>,</xsl:text>
    </xsl:if>
  </xsl:for-each>
</xsl:template>

</xsl:stylesheet>

i am using Xalan nodeset extension to construct a
nodeset for a given addressID..

i guess this is what you want. You may modify the
specifics for your actual XML..

Regards,
Mukul


--- Tim Meals <tmeals(_at_)attbi(_dot_)com> wrote:
I'm working with a problem I'd like to solve with a
single XPath
expression.  Yes, this is slightly off-topic, but
I've seen some of the
mind-boggling XPath expressions pass through this
list and can't figure
out how to do this one myself.

The XML file excerpt is something like this:
...
<Address addressID="100">
    <Name xml:lang="en">90 - Test Name</Name>
    ...
</Address>
...
<Address addressID="100">
    <Name xml:lang="en">91 - Another Name</Name>
    ...
</Address>

By definition, there are more than one Address
element per XML file.
Normally, there will be exactly two, but the spec
allows the number to
be open-ended.

I would like to receive back a nodeset from the
XPath expression, but
concatenating the addressID with the
substring-before(Name, ' ').  If I
evaluate:
    concat( //Address/@addressID, '-',
            substring-before( //Address/Name, ' ' )
)
I get back a String with one value ("100-90", in
this case).  What I
want is a nodeset containing elements with "100-90",
"100-91".  Does
anyone have any ideas on how to procede?  I'm
running Xalan 2.4.1, but
could upgrade to 2.5.1 if there is functionality
there that's not
present in 2.4.1.

Thanks,
Tim

-- 
e-mail: tmeals(_at_)attbi(_dot_)com

"Recommend to your children virtue; that alone can
make them
 happy, not gold."
    -- Ludwig van Beethoven

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