RE: Problem for : increment a variable in a for-each?

I don't fully understand your problem, and the code layout has become
unreadable. But I would think you can solve the problem using the functions
position() and last().

position() gives the position of a node in the sequence of nodes currently
selected by xsl:for-each or xsl:apply-templates, or being filtered by a
predicate. last() gives the number of nodes in such a sequence.
position()=last() is true if the current node is the last one.
position()=last()-1 is true if it is the last but one.

Sometimes you need to know the absolute position of a node in the source
tree, regaredless of the processing order. In such cases you can use
constructs such as xsl:number or count(preceding-sibling::*).

Michael Kay
http://www.saxonica.com 

> -----Original Message-----
> From: que Li [mailto:queincanada@xxxxxxxx] 
> Sent: 29 November 2004 04:33
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE:  Problem for : increment a variable in a for-each? 
> 
> Hi Michael:
>    Thans for help. In actually I found It is good for
> me to use the xpath to find the logical chilld node to
> format them. 
> 
> 
> But I have last probelm:
> How can I get the current node position on the special
> list?
> 
> Example:
> <Subject_List>
>     <Subject_ID>
>     <Subject_Title>
>     <Subject_Parent_ID>
> </Subject_List>
> There have three type of node
> 
> 
> Type A; (Logical parent node)
>   Subject_Parent_ID =1
> 
> Type B: (Logical child node and its logical parent
> node exist)
> 
> Type C: (Logical child node and its logical parent
> node do not exist)
> Subject_Parent_ID not eauql 1 but the logical parent
> node  exist 
> 
> my question:
> If the current node is belong to type A or type B. How
> I know It is position for typeA and typeB list.
> 
> 
> my XSL file:
> <xsl:template match="SubjectLists">
>            <xsl:apply-templates />
>          </xsl:template>		
>        <xsl:template match="Subject_List" >
>        <xsl:choose>
> 			<xsl:when test="Subject_Parent_ID=1">
> 				                    <xsl:choose>
> 								
> 			<xsl:when
> test="not(preceding-sibling::Subject_List)">
> 		                                        
> <b><xsl:value-of select="Subject_Title"/></b>
> 								
> 			</xsl:when>
> 								
> 			<xsl:when
> test="not(following-sibling::Subject_List)">
> 								
> 			       <b> ;<xsl:value-of
> select="Subject_Title"/></b>
> 								
> 			</xsl:when>
> 								
> 			<xsl:otherwise>
> 								
> 				   <b> and  <xsl:value-of
> select="Subject_Title"/></b>
> 								
> 			</xsl:otherwise>
>                                  </xsl:choose>  
>                                    <xsl:call-template
> name="findChildNode">
> 								
> 		   <xsl:with-param name="ParentID"
> select="Subject_ID"/>
>                                   </xsl:call-template>
> 
>                      </xsl:when> 
>                      <xsl:otherwise>
>                           <xsl:call-template
> name="findParentNode">
>                                   <xsl:with-param
> name="ID" select="Subject_Parent_ID"/>
>                           </xsl:call-template> 
>                     </xsl:otherwise>  
>             </xsl:choose>                   
> 	</xsl:template> 
> 	<xsl:template name="findChildNode">
> 	       <xsl:param name="ParentID"/>
> 	           <xsl:for-each
> select="../Subject_List[Subject_Parent_ID=$ParentID]">
>                      <xsl:choose>
>                               <xsl:when
> test="position()=1 and last() &gt;2 ">
> 							        
>  <b> ( <xsl:value-of
> select="Subject_Title"/></b>
> 			                  </xsl:when>
> 			                      <!--only one-->
> 							 
> <xsl:when test="position()=1 and last()=1">
> 							        
>  <b> ( <xsl:value-of
> select="Subject_Title"/> )</b>
> 			                  </xsl:when>
> 			                  <!--only two-->
> 			                  <xsl:when 
> test="position()=1 and 
> last()=2 ">
> 							        
>  <b> ( <xsl:value-of
> select="Subject_Title"/> </b>
> 			                  </xsl:when>
> 			                  <xsl:when 
> test="position()!=1 and
> position()=last()">
>                                            <b> and
> <xsl:value-of select="Subject_Title"/> )</b>          
>     
> 			                  </xsl:when>
> 			                   <xsl:otherwise>
> 			                         <b> ; <xsl:value-of
> select="Subject_Title"/></b>           
> 			                  </xsl:otherwise> 
> 					</xsl:choose> 	       
> 	        </xsl:for-each>
> 	</xsl:template>
> 	<xsl:template name="findParentNode" >
> 	       <xsl:param name="ID"/>
> 	      		 <xsl:if 
> test="count(../Subject_List[Subject_ID=$ID]) = 0">
> 	      		      <xsl:choose>
> 								
> <xsl:when
> test="not(preceding-sibling::Subject_List)">
> 		                                        
> <b><xsl:value-of select="Subject_Title"/></b>
> 								
> </xsl:when>
> 								
> <xsl:when
> test="not(following-sibling::Subject_List)">
> 								
> 			       <b> ;<xsl:value-of
> select="Subject_Title"/></b>
> 								
> </xsl:when>
> 								
> <xsl:otherwise>
> 								
> 				   <b> and  <xsl:value-of
> select="Subject_Title"/></b>
> 				    			</xsl:otherwise>
> 				     </xsl:choose>  			
> 			      </xsl:if>    
> 	 </xsl:template>   
> XML file:
>  <root>
> <SubjectLists>
>    <Subject_List>
>   		<Subject_ID>31</Subject_ID> 
>   		<Subject_Title>Biology</Subject_Title> 
>   		<Subject_Parent_ID>30</Subject_Parent_ID> 
> </Subject_List>
>   <Subject_List>
>   		<Subject_ID>32</Subject_ID> 
> <Subject_Title>Chemistry</Subject_Title> 
> <Subject_Parent_ID>30</Subject_Parent_ID> 
>  </Subject_List>
>    <Subject_List>
>   		<Subject_ID>24</Subject_ID> 
> <Subject_Title>Legal Studies</Subject_Title> 
> <Subject_Parent_ID>1</Subject_Parent_ID> 
>   </Subject_List>
>  <Subject_List>
>   		<Subject_ID>17</Subject_ID> 
> <Subject_Title>Music</Subject_Title> 
> <Subject_Parent_ID>14</Subject_Parent_ID> 
>   </Subject_List>
>      <Subject_List>
>   		<Subject_ID>30</Subject_ID> 
>   		<Subject_Title>Science</Subject_Title> 
>   		<Subject_Parent_ID>1</Subject_Parent_ID> 
>   </Subject_List>
>     <Subject_List>
>   <Subject_ID>18</Subject_ID> 
>   <Subject_Title>Visual Arts</Subject_Title> 
>   		  <Subject_Parent_ID>14</Subject_Parent_ID> 
>  </Subject_List>
>   </SubjectLists>
> </root>
> 
> 
> 
> Now the result is:
> 
> and Legal Studies and Music and Science ( Biology and
> Chemistry ) ;Visual Arts 
> 
> 
> the correct result should be:
> 
> Legal Studies ; Music ; Science ( Biology and
> Chemistry ) and Visual Arts 
> 
> 
> Thanks
> Helena
>  
> 
> ______________________________________________________________
> ________ 
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