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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Sum Problem
 in general in XSLT you can not "pass parameters back", you only can store the "result of a template" in a variable: <xsl:variable name="sum">
<xsl:apply-templates select="sections/section[@id=$A]/item[@id=$index]">
<xsl:with-param name="index" select="$index"/>
<xsl:with-param name="total" select="$total"/>
</xsl:apply-templates>
</xsl:variable>But this doesn't solve your recursive problem. Here is my stylesheet: <xsl:param name="total" select="0"/> <xsl:param name="index" select="1"/> <xsl:param name="section-string" select="'AB'"/> <xsl:key name="items" match="item" use="concat(../@id,'::',@id)"/> <xsl:template match="sections">
<table border="1">
<tr>
<td> </td>
<td>index</td>
<td>total</td>
</tr>
<tr>
<td>starting</td>
<td><xsl:value-of select="$index"/></td>
<td><xsl:value-of select="$total"/></td>
</tr>
<xsl:apply-templates select="key('items', concat('A::',$index))">
<xsl:with-param name="total" select="$total"/>
<xsl:with-param name="index" select="$index"/>
</xsl:apply-templates>
</table>
</xsl:template><xsl:template match="item"> <xsl:param name="total" select="0"/> <xsl:param name="index" select="0"/> <xsl:variable name="newtotal" select="$total + @value"/> <xsl:variable name="newindex" select="$index + @value"/> <tr> <td><xsl:value-of select="../@id"/></td> <td><xsl:value-of select="$newindex"/></td> <td><xsl:value-of select="$newtotal"/></td> </tr> <!-- switches from A to B and the other way around --> <xsl:variable name="section" select="substring($section-string, string-length(substring-after($section-string, ../@id)) + 1, 1)"/> <xsl:if test="not(key('items', concat($section, '::', $newindex)))"> <tr> <td colspan="3"> No item with index <xsl:value-of select="$newindex"/> in Section <xsl:value-of select="$section"/>. </td> </tr> </xsl:if> <xsl:apply-templates select="key('items', concat($section, '::', $newindex))"> <xsl:with-param name="total" select="$newtotal"/> <xsl:with-param name="index" select="$newindex"/> </xsl:apply-templates> </xsl:template> What's this for an algorithm? And what's the sense of calculating $index and $total? When you now the difference 1 at the start, then the difference must be 1 at the end too, because to both sums always @value will be added. So you only need to calculate $index and remove or add the difference from the start for getting $total. Regards, Joerg Kirwan, K. wrote: > Dear All, > > I've an XML file as follows- > > > <section id="A"> > <item id="1" value="1"/> > <item id="2" value="2"/> > <item id="3" value="2"/> > <item id="4" value="2"/> > </section> > <section id="B"> > <item id="1" value="1"/> > <item id="2" value="10"/> > <item id="3" value="3"/> > <item id="4" value="4"/> > </section> > > I would like to sum CERTAIN values within the above xml as follows: > > 1- starting conditions $index=1 $total=0 > 2- select sectionA/item[@index=$index] (has @value=1) > 3- calculate $total=$total+@value (=0+1) > 4- calculate $index=$index+@value (=1+1) > > 5- select sectionB/item[@index=$index] (item2 which has > value=10) > 6- repeat steps 3-4 using new $index -> $total=1+10, > index=2+10 > > I'm guessing this requires some form of recursion but can't figure out how > to pass > extracted parameters back to the calling template. > i.e. i'd like to do something like this with the updated totals returned to > the calling root-template. > --------------------- > <?xml version="1.0"?> > <xsl:transform > xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > version="1.0"> > <xsl:output method="xml"/> > > <xsl:param name="A" select="'A'"/> > <xsl:param name="B" select="'B'"/> > <xsl:param name="index" select="1"/> > <xsl:param name="total" select="0"/> > > <xsl:template match="/"> > <sections> > <section1> > <xsl:apply-templates select="sections/section[@id=$A]/item[@id=$index]"> > <xsl:with-param name="index" select="$index"/> > <xsl:with-param name="total" select="$total"/> > </xsl:apply-templates> > </section1> > <section2> > <xsl:apply-templates select="sections/section[@id=$A]/item[@id=$index]"> > <xsl:with-param name="index" select="$index"/> > <xsl:with-param name="total" select="$total"/> > </xsl:apply-templates> > </section2> > </sections> > </xsl:template> > > <xsl:template match="item"> > <xsl:param name="index"> > <xsl:param name="total"> > <xsl:param name="total"><xsl:value-of select="$total+@value"/></xsl:param> > <xsl:value-of select="$total+@value"/> > </xsl:template> > > </xsl:transform> > > Kieran Kirwan XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list 
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