RE: [xsl] Multiple instances of the same nodeset - is this possible.

["Michael Kay" <michael.h.kay@xxxxxxxxxxxx>]

Your question suggests you are rather confused about node-sets. I can't
pin down exactly what your confusion is. A node-set is a set of nodes,
nothing more. XSLT doesn't care whether two variables containing the
same set of nodes are "the same node-set" or "different node-sets",
because there is no concept of node-set identity.

All of this has nothing to do with why your code doesn't work. Your code
is relying on some relationship between the attributes ListID,
MessageID, and isNewline: you haven't explained this relationship to us,
so I won't try and reverse-engineer your design. If you simply want to
do what you described, and start a new record whenever isNewLine is
true, then your choices are:

(a) a recursive template
(b) Muenchian grouping, using 
      generate-id((.|preceding-sibling::row)[@isNewLine='true'])
    as the grouping key
(c) the XSLT 2.0 construct
   <xsl:for-each-group group-starting-with="row[@isNewLine='true']">

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx 

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> John Aschenbrenner
> Sent: 04 August 2002 23:01
> To: 'XSL-List@xxxxxxxxxxxxxxxxxxxxxx'
> Subject: [xsl] Multiple instances of the same nodeset - is 
> this possible.
> 
> 
> I often find myself in a situation where I would like to 
> traverse a nodeset multiple times simultaneously in a document.
> Example:
> 	<root>
> 	  <row FieldName="CustName" Message="FREELOADER FREDDIE"/>
> 	  <row ListID="391" FieldName="ListOfMessages" 
> Message="This is a message." MessageID="391" IsNewline="True"/>
> 	  <row ListID="402" FieldName="ListOfMessages" 
> Message="Freddie has up to 1 full month" MessageID="402" 
> IsNewline="True"/>
> 	  <row ListID="403" FieldName="ListOfMessages" 
> Message="to pay off his bill." MessageID="402" IsNewline="False"/>
> 	  <row ListID="408" FieldName="ListOfMessages" 
> Message="Most recent data for FREELOADER FREDDIE." 
> MessageID="408" IsNewline="True"/>
> 	  <row ListID="415" FieldName="ListOfMessages" 
> Message="Favorite sports and hobbies: Bicycling backgammon" 
> MessageID="415" IsNewline="True"/>
> 	  <row ListID="416" FieldName="ListOfMessages" 
> Message="and sailing." MessageID="415" IsNewline="False"/>
> 	  <row ListID="514" FieldName="ListOfMessages" 
> Message="Signed liability waiver If participating in 
> category" MessageID="514" IsNewline="True"/>
> 	  <row ListID="515" FieldName="ListOfMessages" 
> Message="A sporting activities." MessageID="514" IsNewline="False"/>
> 	</root>
> 
> 
> What I would like to do with this data is output it in a 
> tabular format.  If the attribute IsNewline="True" then I 
> have the beginning of a new record else just concatenate it 
> to the previous.
> 
> I have a template that looks like this.
>     <xsl:template name="GetMessages">
>       <xsl:param name="GetMessagesSet1"/>
>       <xsl:param name="GetMessagesSet2"/>
> 
>         <xsl:for-each select="$GetMessagesSet1[@IsNewline='True']">
>           <xsl:variable name="i" select="position()"/>
>           <xsl:variable name="MessageID" 
> select="$GetMessagesSet1[$i]/@ListID"
>         	<tr>
>         		<td valign="bottom" align="left" width="10%">
>         			<p class="feedbackMsg">______</p>
>         		</td>
>         		<td align="left" width="80%">
>         			<p class="feedbackMsg">
> 
>           			<xsl:for-each 
> select="$GetMessagesSet2[@MessageID=$MessageID]">
>           			  <xsl:variable name="j"
> select="position()"/>
>           			  <xsl:value-of 
> select="$GetMessagesSet1[@MessageID=$MessageID][$j]/@Message"/>
>           			</xsl:for-each>
>           			
>         			</p>
>         		</td>
>         		<td valign="bottom" align="middle" width="10%">
>         			<p 
> class="feedbackMsg">________________</p>
>         		</td>
>         	</tr>
>         </xsl:for-each>
>         
>     </xsl:template>
> 
> As you may have guessed when I call this template as follows 
> <xsl:call-template name="GetMessages">
>   <xsl:with-param name="GetMessagesSet1" 
> select="z:row[@FieldName='ListOfMessages']"/>
>   <xsl:with-param name="GetMessagesSet2" 
> select="z:row[@FieldName='ListOfMessages']"/>
> </xsl:call-template>
> 
> it does not work as I would like because even though I think 
> I have created two independent nodesets.  I only have one.
> 
> My question is this - Is it somehow possible to have two 
> independent nodesets with identical data that you can 
> traverse simultaneously?
> 
> I have since solved my problem by using a recursive template 
> - however I would still like my question answered.
> 
> Thank you,
> John Aschenbrenner
> Ignition Mortgage Technology Solutions, Inc. 
> jaschenbrenner@xxxxxxxxxxxxxxx
> Ph: (253)858-8955 x 239
> http://www.ignitionmts.com
> 
> 
> 
> 
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