Start with an identity template:

<xsl:template match="*">
  <xsl:copy>
  <xsl:copy-of select="@*"/>
  <xsl:apply-templates/>
  </xsl:copy>
</xsl:template>

Add a template to handle the href:

<xsl:template match="reg[@href]">
  <xsl:copy-of select="//regdef[@name=current()/@href]"/>
</xsl:template>

And another template to avoid copying the regdef:

<xsl:template match="regdef"/>

This creates the document that you say you want to form the *input* to the
transformation. So you want a pipeline of two transformations: first the one
above, then the other one you had in mind. You can either write the two
transformations as part of the same stylesheet (using modes, with a variable
used to hold the result of the first transformation) or you can put them in
separate stylesheets and organise the pipeline at the application level.

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: Agnisys Technology (P) Ltd. [mailto:agnisys@xxxxxxxxx] 
> Sent: 13 September 2005 00:03
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE:  Is it possible to modify the source-tree?
> 
> My input looks like this:
> <a>
>    <b offset="5">
>       <reg>reg_1</reg>
>       <reg href="REGDEF1"/>
>    </b>
> 
>   <regdef name="REGDEF1">
>       <reg>reg_10</reg>
>       <reg>reg_20</reg>
>   </regdef>
>  
> </a>
> 
> I want the <reg href="REGDEF1"/> be replaced with the 
> definition defined above, namely :
>       <reg>reg_10</reg>
>       <reg>reg_20</reg>
> 
> So to the XSLT parser, the input looks like:
> <a>
>    <b offset="5">
>       <reg>reg_1</reg>
>       <reg>reg_10</reg>
>       <reg>reg_20</reg>
>    </b>
> </a>
> 
> The output is based on the attributes of the <b> node and the 
> siblings. If I use
> <xsl:apply_templates> I will have to pass a whole bunch of 
> info to the template.
> 
> Thanks,
> Anupam.
> 
> 
> --- Michael Kay <mike@xxxxxxxxxxxx> wrote:
> 
> > The simple answer is: no.
> > 
> > You'll have to explain the requirement more carefully, I 
> can't really
> > understand from this what you're trying to do.
> > 
> > Michael Kay
> > http://www.saxonica.com/ 
> > 
> >
> 
> 
> 		
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