Re: XSLT: Selecting nodes based on a group of other nodes

I am afraid you cannot but I would love to have this possibility in
XSLT:

XSLT draft:
Variables introduce an additional data-type into the expression
language. This additional data type is called result tree fragment. A
variable may be bound to a result tree fragment instead of one of the
four basic XPath data-types (string, number, boolean, node-set). A
result tree fragment represents a fragment of the result tree. A result
tree fragment is treated equivalently to a node-set that contains just a
single root node. However, the operations permitted on a result tree
fragment are a subset of those permitted on a node-set. An operation is
permitted on a result tree fragment only if that operation would be
permitted on a string (the operation on the string may involve first
converting the string to a number or boolean). In particular, it is not
permitted to use the /, //, and [] operators on result tree fragments.
When a permitted operation is performed on a result tree fragment, it is
performed exactly as it would be on the equivalent node-set.

Mark Sztainbok wrote:
> 
> That's not exactly what I'm looking for. What I need to do is store the node
> list into a variable so that something like the following can be done:
> 
> <xsl:choose>
>     <xsl:when test="/RESPONSE/FILTERED">
>         <!-- Set products variable to products that have corresponding
> SELECTEDPRODUCT nodes -->
>         <!-- Insert my attempts to code here -->
>     </xsl:when>
>     <xsl:otherwise>
>         <!-- Set products variable to all the products -->
>         <xsl:variable name="products" select="/RESPONSE/PRODUCT"/>
>     </xsl:otherwise>
> </xsl:choose>
> <xsl:for-each select="$products">
>     <!-- Process products here -->
> </xsl:for-each>
> 
> Any ideas of how to set the products variable in the first case given the
> description of what I want to do that I gave in my first email?
> 
> Thanks,
> 
> Mark
> 
> ----- Original Message -----
> From: Miloslav Nic <nicmila@xxxxxxxx>
> To: <xsl-list@xxxxxxxxxxxxxxxx>
> Sent: Thursday, September 09, 1999 4:58 PM
> Subject: Re: XSLT: Selecting nodes based on a group of other nodes
> 
> > Look at http://zvon.vscht.cz/HTMLonly/XSLTutorial/Books/Book1/index.html
> > example 75. It can help.
> >
> > Mark Sztainbok wrote:
> > >
> > > Is there a way to select nodes out of a document if they have a value
> which
> > > matches a value in another group of nodes?
> > >
> > > For example,
> > >
> > > if I have a document which looks like this:
> > >
> > > <RESPONSE>
> > >     <PRODUCT>
> > >         <ID>ABC</ID>
> > >         <NAME>Brown dog</NAME>
> > >     </PRODUCT>
> > >     <PRODUCT>
> > >         <ID>DEF</ID>
> > >         <NAME>Black cat</NAME>
> > >     </PRODUCT>
> > >     <PRODUCT>
> > >         <ID>GHI</ID>
> > >         <NAME>Yellow giraffe</NAME>
> > >     </PRODUCT>
> > >     <PRODUCT>
> > >         <ID>JKL</ID>
> > >         <NAME>Orange monkey</NAME>
> > >     </PRODUCT>
> > >     <SELECTEDPRODUCT>ABC</SELECTEDPRODUCT>
> > >     <SELECTEDPRODUCT>GHI</SELECTEDPRODUCT>
> > > </RESPONSE>
> > >
> > > I would like to get a node list of the products which have an ID which
> is in
> > > a SELECTEDPRODUCT element i.e. products ABC and GHI (Brown dog and
> Yellow
> > > giraffe) and store it in a variable so I can use it later with for-each
> > >
> > > I have tried the following XSLT code but it doesn't work as it only gets
> the
> > > first product:
> > > <xsl:variable name="IDS" select="/RESPONSE/SELECTEDPRODUCT"/>
> > > <xsl:variable name="products" select="/RESPONSE/PRODUCT[ID = $IDS]/>
> > >
> > > and have also tried this, which also did not work:
> > > <xsl:variable name="products"/>
> > > <xsl:for-each select="RESPONSE/SELECTEDPRODUCT">
> > >     <xsl:variable name="product_id" select="text()"/>
> > >     <xsl:choose>
> > >         <xsl:when test="$products">
> > >             <xsl:variable name="products"
> > > select="$products|/RESPONSE/PRODUCT[ID=$product_id])"/>
> > >         </xsl:when>
> > >         <xsl:otherwise>
> > >             <xsl:variable name="products"
> > > select="/RESPONSE/PRODUCT[ID=$product_id]"/>
> > >         </xsl:otherwise>
> > >    </xsl:choose>
> > > </xsl:for-each>
> > >
> > > What is the correct way to do this?
> > >
> > > Thanks,
> > >
> > > Mark
> >
> > --
> > ***************************************************************
> > Dr. Miloslav Nic                        e-mail: nicmila@xxxxxxxx
> > Department of Organic Chemistry         TEL: +420 2 2435 5012
> > ICT Prague (VSCHT Praha)                     +420 2 2435 4118
> >             FAX: +420 2 2435 4288
> > ****************************************************************
> >
> >
> >  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list

-- 
***************************************************************
Dr. Miloslav Nic                        e-mail: nicmila@xxxxxxxx
Department of Organic Chemistry         TEL: +420 2 2435 5012  
ICT Prague (VSCHT Praha)                     +420 2 2435 4118
    				        FAX: +420 2 2435 4288  
****************************************************************


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list