[xsl] matching the first following sibling

[Biying Huang <biying.huang@xxxxxxxxxxxxxxx>]

Dear All,

I have trouble with matching the first following sibling which has a
child's value differ from the current one's.

I need my output look like this:

3000: 9
5000: 5
4000: 8

But I can only get the first line,  3000 : 9

Here is my xslt:

<xsl:template match="ProductList">
    <xsl:apply-templates select="Substance[position() = 1 ]" />
</xsl:template>

<xsl:template match="Substance">
  <xsl:value-of select = "productId"/>
   :
  <xsl:value-of select = "sum( num  |
following-sibling::Substance[productId = $productId ]/num)" />

  <!--  now check if there is another unique product, if so, call this
template recursively, but this DOES NOT work   -->
  <xsl:apply-templates select="following-sibling::Substance[productId
!=  ./productId and position() = 1 ]" />

</xsl:template>


I have this xml data:

<ProductList>
  <Substance>
      <productId>3000</productId>
      <num>3</num>
   </Substance>
  <Substance>
      <productId>4000</productId>
      <num>4</num>
   </Substance>
  <Substance>
      <productId>3000</productId>
      <num>3</num>
   </Substance>
  <Substance>
      <productId>5000</productId>
      <num>5</num>
   </Substance>
  <Substance>
      <productId>4000</productId>
      <num>4</num>
   </Substance>
  <Substance>
      <productId>3000</productId>
      <num>3</num>
   </Substance>
 </ProductList>



Thanks in advance for your help.

Biying Huang


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