RE: [xsl] Nesting <xsl:value-of> tags

Subject: RE: [xsl] Nesting <xsl:value-of> tags
From: "Zvolensky, Thomas J {PGL~Nutley}" <THOMAS_J.ZVOLENSKY@xxxxxxxxx>
Date: Tue, 04 Feb 2003 15:05:20 -0500

Thanks for your help.  The code works - sort of.

If the <id> corresponds to the first person in the ShareWebUsers.xml, it returns the correct value of the <ntname> tag.  If the <id> is for the 2nd ... nth person, I get nothing.

There is a sample of what ShareWebUsers.xml looks like:

<?xml version="1.0" encoding="UTF-8"?>

Any idea why I can't get the ntname back for 1580652 or 3113434?

-----Original Message-----
From: Wendell Piez [mailto:wapiez@xxxxxxxxxxxxxxxx]
Sent: Monday, February 03, 2003 4:10 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [xsl] Nesting <xsl:value-of> tags

Hello Thomas,

>Is it possible to nest <xsl: value-of> tags like this?


>   If not, is there another way to look up the value of <ntname> from the 
> other document?

This is how I would do it:

Outside your template, bind the other document to a variable:

<xsl:variable name="lookupdoc" select="document('ShareWebUsers.xml')"/>

Set up a key to retrieve persons by id element child:

<xsl:key name="personsbyID" match="person" use="id"/>

(In your code, you have "person[id=..." so I've said use="id"; change to 
@id if you're actually wanting an attribute not an element)

Then inside your template:

<xsl:for-each select="//*[./@filename != '']">
   <xsl:variable name="ownedby" select="../@ownedby"/>
   <!-- binds the ownedby to a variable so we can get it after
        we change context -->
   <xsl:for-each select="$lookupdoc">
     <!-- change context to lookup doc -->
     <xsl:value-of select="key('personsbyID',$ownedby)/ntname"/>

If you wanted to skip the whole key thing you could simply do


but that's relatively more expensive (since ShareWebUsers.xml will have to 
be traversed again and again, and maybe even parsed repeatedly depending on 
your processor).

<xsl:value-of select="$lookupdoc//person[id=$ownedby]"/>]/ntname"/>

may be somewhat better but is still costly compared to using the key.


Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.      
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
   Mulberry Technologies: A Consultancy Specializing in SGML and XML

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