RE: [xsl] Using key and position()

[Bhupendra Singh <skbhupendra@xxxxxxxxxxx>]

Michael,
My problem is something else.

I am not able to access the variable. So I am getting
an undefined value for $p

<xsl:variable name="p" select="key('parentGroups',
generate-id())/@pos" />

I think the problem is with the key/variable
definition, which is giving nothing for $p.

Your suggestion below will be useful only if I get
some value of $p.
But currently the <xsl:value-of select="$p"/> is
printing a blank.


<PRI_HEADER><xsl:value-of select="$p"/>
   <xsl:value-of select="$var_27[$p]"/>
</PBU_HEADER>


 --- Michael Kay <mike@xxxxxxxxxxxx> wrote: 
> position() returns the position of a node in the
> list of nodes that you are
> currently iterating over. So
> 
> <xsl:variable name="parentGroup">
>   <xsl:for-each select="ParentGroup">
>     <parentgroup id="generate-id()"
> pos="position()"/>
>   </xsl:for-each>
> </xsl:variable>
> 
> will give you values 1,2,3 etc.
> 
> You will get what you are looking for by:
> 
> <xsl:variable name="parentGroup">
>   <xsl:for-each select="*">
>     <xsl:if test="self::parentGroup">
>        <parentgroup id="generate-id()"
> pos="position()"/>
>     </xsl:if>
>   </xsl:for-each>
> </xsl:variable>
> 
> However, there might be a much easier way of doing
> what you are trying to
> do, if you explained your overall problem rather
> than your approach to
> solving it.
> 
> Michael Kay
> http://www.saxonica.com/
> 
> > -----Original Message-----
> > From: Bhupendra Singh
> [mailto:skbhupendra@xxxxxxxxxxx] 
> > Sent: 16 November 2004 16:13
> > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > Subject: [xsl] Using key and position()
> > 
> > Hi,
> > I have an input XML like this:
> > 
> > <action>
> > 	- <ParentGroup> Node1 </ParentGroup>
> > 	- <ChildGroup> Node1.1 </ChildGroup>
> > 	- <Child Node1>1.1.1 </Child Node1>
> > 	- <Child Node2>1.1.2 </Child Node2>
> > 	- <ParentGroup> Node1 </ParentGroup>
> > 	- <ChildGroup> Node1.2 </ChildGroup>
> > 	- <Child Node1>1.2.1 </Child Node1>
> > 	- <Child Node2>1.2.2 </Child Node2>
> > 	- <ParentGroup> Node1 </ParentGroup>
> > 	- <ChildGroup> Node1.3 </ChildGroup>
> > 	- <Child Node1>1.3.1 </Child Node1>
> > 	- <Child Node2>1.3.2 </Child Node2>
> > 	- <ParentGroup> Node1 </ParentGroup>
> > 	- <ChildGroup> Node1.3 </ChildGroup>
> > 	- <Child Node1>1.3.x </Child Node1>
> > 	- <Child Node2>1.3.y </Child Node2>
> > 
> > 	- <ParentGroup> Node2 </ParentGroup>
> > 	- <ChildGroup> Node2.1 </ChildGroup>
> > 	- <Child Node1>2.1.1 </Child Node1>
> > 	- <Child Node2>2.1.2 </Child Node2>
> > 	- <ParentGroup> Node2 </ParentGroup>
> > 	- <ChildGroup> Node2.2 </ChildGroup>
> > 	- <Child Node1>2.2.1 </Child Node1>
> > 	- <Child Node2>2.2.2 </Child Node2>
> > 	- <ParentGroup> Node2 </ParentGroup>
> > 	- <ChildGroup> Node2.3 </ChildGroup>
> > 	- <Child Node1>2.3.1 </Child Node1>
> > 	- <Child Node2>2.3.2 </Child Node2>
> > ...........
> > </action>
> > 
> > I want to capture the position of each of the
> > <ParentGroup> elements and store it in a variable
> by
> > going through the document only once. 
> > 
> > <xsl:variable name="parentGroup">
> >   <xsl:for-each select="ParentGroup">
> >     <parentgroup id="generate-id()"
> pos="position()"/>
> >   </xsl:for-each>
> > </xsl:variable>
> > 
> > 
> > Then I want to use this variable to get the
> position
> > of each <ParentGroup> and find its coresponding
> > <ChildGroup> and <Child Nodes>.
> > 
> > When I print the contents of the variable(@id and
> > @pos), then I find that the content is correct,
> but
> > when I try to retreive the content using key then
> I
> > get nothing.  Here is the XSL that I have.
> > 
> > 
> > <?xml version="1.0" ?>
> > <xsl:stylesheet
> > xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
> > version="1.0">
> > 
> > <!-- Key to group distinct ChildGroup's -->
> > <xsl:key name="SEC_CUST" match="ChildGroup"
> use="."/>
> > 
> > <!-- Key to group distinct ParentGroup's -->
> > <xsl:key name="PRI_CUST" match="ParentGroup"
> use="."/>
> > 
> > <!-- Key to find position of ParentGroup's -->
> > <xsl:key name="parentGroups" match="parentGroup"
> > use="@id"/>
> > 
> > <xsl:template match="/">
> > 	<xsl:apply-templates/>
> > </xsl:template>
> > 
> > 
> > <xsl:template match="action">
> > <TRANS_OUTPUT>
> > <CUSTOMERS>
> > <xsl:variable name="var_24" select="Child Node1"
> />
> > <xsl:variable name="var_27" select="Child Node2"
> />
> > 
> > <!-- Variable to store the posittion of each
> > ParentGroup nodes -->
> > <xsl:variable name="parentGroup"> 
> >   <xsl:for-each select="ParentGroup">
> >     <parentgroup>
> >     <xsl:attribute name="id"
> select="generate-id()"/>
> >     <xsl:attribute name="pos"
> select="position()"/>
> >     </parentgroup>
> >   </xsl:for-each>
> > </xsl:variable>
> > 
> >   <xsl:for-each select="$var_21[count(. |
> > key('PRI_CUST', .)[1]) = 1]">
> >   <PRIMARY CUSTOMER>
> >      <xsl:variable name="priId" select="." />
> >      <xsl:variable name="p"
> > select="key('parentGroups', generate-id())/@pos"
> />
> >      <PRI_HEADER><xsl:value-of select="$p"/>
> >           <xsl:value-of select="$var_27[$p]"/>
> >      </PBU_HEADER>
> >      <PRIMARY_CUST_DESC>
> >         <xsl:value-of select="$var_24[$p]"/>
> >         <xsl:text> </xsl:text>
> >         <xsl:value-of select="$priId"/>
> >      </PRIMARY_CUST_DESC>
> > 
> >      <SECONDARY CUSTOMER> 
> >       <xsl:for-each select= SECONDARY CUSTOMER....
> >       ....group &.Do processing for Sec customers
> >      </SECONDARY CUSTOMER> 
> > 
> >     </End of for loop for Primary cusotmer>
> >     </PRIMARY CUSTOMER>
> > </CUSTOMERS>
> > </TRANS_OUTPUT>
> > 
> > 
> > In the above XSL..I get the value of $p undefined 
> > 
> > <xsl:variable name="p" select="key('parentGroups',
> > generate-id())/@pos" />
> > 
> > So when I access $var_27[$p] and $var_24[$p] ..I
> get
> > nothing.
> > 
> >      <PRI_HEADER><xsl:value-of select="$p"/>
> >           <xsl:value-of select="$var_27[$p]"/>
> >      </PBU_HEADER>
> >      <PRIMARY_CUST_DESC>
> >         <xsl:value-of select="$var_24[$p]"/>
> >         <xsl:text> </xsl:text>
> >         <xsl:value-of select="$priId"/>
> >      </PRIMARY_CUST_DESC>
> > 
> > 
> > Can someone please let me know what has gone
> wrong.
> > 
> > 
> > 
> > 
> > 		
> >
>
___________________________________________________________
> 
> 
=== message truncated === 

=====
regards,
Bhupendra.

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