Re: [xsl] Accessing elements with key via string in variable

["Tim Lebo" <timleboxslt@xxxxxxxxx>]

Interesting.

I got the output I was looking for by adding a variable in my root template:

<xsl:template match="/">
 <xsl:variable name="input" select="*"/>

and modifying the key access on line 14 to:

<xsl:value-of select="concat(.,' ',count(key('things-by-a',.,$input)),$NL)"/>

Is there a cleaner way to do it?

Regards,
Tim

On 6/25/06, Michael Kay <mike@xxxxxxxxxxxx> wrote:
> The key() function (with two arguments) selects nodes in the document that
> contains the context node. When you do
>
> <xsl:for-each select="$as/a">
>      14     <xsl:value-of select="concat(.,'
> ',count(key('things-by-a',.)),$NL)"/>
>      15   </xsl:for-each>
>
> you are selecting things in the document $as, which I suspect is not what
> you want.
>
> In XSLT 2.0 you can use the third argument of key() to determine which
> document to search.
>
> Michael Kay
> http://www.saxonica.com/
>
>
>
> > -----Original Message-----
> > From: Tim Lebo [mailto:timleboxslt@xxxxxxxxx]
> > Sent: 25 June 2006 23:13
> > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > Subject: [xsl] Accessing elements with key via string in variable
> >
> > Hello,
> >
> > (The problem exists with the key on line 14)
> >
> > I am trying to access 'thing' elements by the value of their 'a'
> > element children.
> > I do not know what the contents of the 'a' elements will be,
> > so I gather the unique values and iterate through them. When
> > I iterate through, I can print the value, placing the value
> > into the key does not return the 'things' that have 'a'
> > children with that value.
> > Additionally, placing a literal string will access the
> > desired nodes, but a variable with the same string content does not.
> >
> > The input, current output, desired output, xslt (with line
> > numbers) and xslt are listed below.
> >
> > Many thanks,
> > Tim
> >
> > ======= Input ========
> > <things>
> >   <thing>
> >     <name>thing_1</name>
> >     <a>one</a>
> >   </thing>
> >   <thing>
> >     <name>thing_3</name>
> >     <a>one</a>
> >     <a>two</a>
> >   </thing>
> >   <thing>
> >     <name>thing_4</name>
> >     <a>one</a>
> >     <a>two</a>
> >     <a>three</a>
> >   </thing>
> >   <thing>
> >     <name>thing_5</name>
> >     <a>three</a>
> >   </thing>
> > </things>
> >
> > ======= Current Output =========
> > Dynamic Selection (DOES NOT WORK)
> > one 0
> > two 0
> > three 0
> >
> > ======= Desired output ========
> > Hard-coded selection (DESIRED OUTPUT)
> > one 3
> > two 2
> > three 2
> >
> >
> > ======== XSLT =========
> >       1 <xsl:transform version="2.0"
> > xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
> >       2 <xsl:output method="text"/>
> >       3 <xsl:key name="things-by-a" match="thing" use="a"/>
> >       4
> >       5 <xsl:template match="/">
> >       6   <xsl:variable name="as">
> >       7     <xsl:for-each-group select="//a" group-by=".">
> >       8       <a><xsl:value-of select="current-grouping-key()"/></a>
> >       9     </xsl:for-each-group>
> >      10   </xsl:variable>
> >      11
> >      12   <xsl:value-of select="concat($NL,'Dynamic Selection (DOES
> > NOT WORK)',$NL)"/>
> >      13   <xsl:for-each select="$as/a">
> >      14     <xsl:value-of select="concat(.,'
> > ',count(key('things-by-a',.)),$NL)"/>
> >      15   </xsl:for-each>
> >      16
> >      17   <xsl:value-of select="concat($NL,'Hard-coded selection
> > (DESIRED OUTPUT)',$NL)"/>
> >      18   <xsl:value-of select="concat('one
> > ',count(key('things-by-a','one')),$NL)"/>
> >      19   <xsl:value-of select="concat('two
> > ',count(key('things-by-a','two')),$NL)"/>
> >      20   <xsl:value-of select="concat('three
> > ',count(key('things-by-a','three')),$NL)"/>
> >      21 </xsl:template>
> >      22
> >      23 <xsl:variable name="NL">
> >      24 <xsl:text>
> >      25 </xsl:text>
> >      26 </xsl:variable>
> >      27
> >      28 </xsl:transform>
> >
> > ======== XSLT w/o line numbers ========= <xsl:transform
> > version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
> > <xsl:output method="text"/>
> > <xsl:key name="things-by-a" match="thing" use="a"/>
> >
> > <xsl:template match="/">
> >   <xsl:variable name="as">
> >     <xsl:for-each-group select="//a" group-by=".">
> >       <a><xsl:value-of select="current-grouping-key()"/></a>
> >     </xsl:for-each-group>
> >   </xsl:variable>
> >
> >   <xsl:value-of select="concat($NL,'Dynamic Selection (DOES
> > NOT WORK)',$NL)"/>
> >   <xsl:for-each select="$as/a">
> >     <xsl:value-of select="concat(.,'
> > ',count(key('things-by-a',.)),$NL)"/>
> >   </xsl:for-each>
> >
> >   <xsl:value-of select="concat($NL,'Hard-coded selection
> > (DESIRED OUTPUT)',$NL)"/>
> >   <xsl:value-of select="concat('one
> > ',count(key('things-by-a','one')),$NL)"/>
> >   <xsl:value-of select="concat('two
> > ',count(key('things-by-a','two')),$NL)"/>
> >   <xsl:value-of select="concat('three
> > ',count(key('things-by-a','three')),$NL)"/>
> > </xsl:template>
> >
> > <xsl:variable name="NL">
> > <xsl:text>
> > </xsl:text>
> > </xsl:variable>
> >
> > </xsl:transform>