Re: sum() with selective attribute

  for the given xml shown below, I would get a grand total per each
currency...

  I guess I can do something like
sum(/REPORT/ENTITY/FUND_GROUP/ROW/SOME_VALUE) along with "xsl:if", but I'd
like to avoid scanning through the tree again looking up CURRENCY
attribute... any suggestion?

T:\ftemp>type insoo.xml
<REPORT>
    <ENTITY NUMBER="1">
        <FUND_GROUP CURRENCY="GBP">
            <ROW>
                <SOME_VALUE>100</SOME_VALUE>
            </ROW>
            <ROW>
                <SOME_VALUE>200</SOME_VALUE>
            </ROW>
            <ROW>
                <SOME_VALUE>300</SOME_VALUE>
            </ROW>
        </FUND_GROUP>

        <FUND_GROUP CURRENCY="USD">
            <ROW>
                <SOME_VALUE>100</SOME_VALUE>
            </ROW>
            <ROW>
                <SOME_VALUE>200</SOME_VALUE>
            </ROW>
            <ROW>
                <SOME_VALUE>300</SOME_VALUE>
            </ROW>
        </FUND_GROUP>
    </ENTITY>

    <ENTITY NUMBER="2">
        <FUND_GROUP CURRENCY="GBP">
            <ROW>
                <SOME_VALUE>100</SOME_VALUE>
            </ROW>
            <ROW>
                <SOME_VALUE>200</SOME_VALUE>
            </ROW>
        </FUND_GROUP>

        <FUND_GROUP CURRENCY="USD">
            <ROW>
                <SOME_VALUE>200</SOME_VALUE>
            </ROW>
            <ROW>
                <SOME_VALUE>300</SOME_VALUE>
            </ROW>
        </FUND_GROUP>
    </ENTITY>

T:\ftemp>type insoo.xsl
<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="1.0">

<xsl:template match="/">
  <currency-sums>
    <xsl:for-each select="$currencies">
      <xsl:if test="generate-id(.)=
                    generate-id( $currencies[ @CURRENCY =
                                              current()/@CURRENCY ] )">
        <sum currency="{@CURRENCY}">
          <xsl:value-of select="sum( $currencies[@CURRENCY=
                                     current()/@CURRENCY]/ROW/SOME_VALUE )"/>
        </sum>
      </xsl:if>
    </xsl:for-each>
  </currency-sums>
</xsl:template>

T:\ftemp>saxon insoo.xml insoo.xsl
<?xml version="1.0" encoding="utf-8"?>
<currency-sums>
   <sum currency="GBP">900</sum>
   <sum currency="USD">1100</sum>
</currency-sums>
T:\ftemp>

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