Re: [xsl] How to iterate over the output of distinct-values()?

["Dimitre Novatchev" <dnovatchev@xxxxxxxxx>]

In addition to the detailed explanation provided by Dr. Kay, the
problem probably could be avoided altogether had the
  <xsl:for-each-group>
instruction been used.

I'd also recommend to use a reference to an xsl:function over using
  xsl:call-template


--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.



On 6/6/06, cknell@xxxxxxxxxx <cknell@xxxxxxxxxx> wrote:
> I have a document that consists of elements like this.
>
>  <ROW>
>  <CONTRACTOR></CONTRACTOR>
>  <CASE_NO></CASE_NO>
>  <SCHD_DATE></SCHD_DATE>
>  <VERBAL></VERBAL>
>  <COMPLT></COMPLT>
>  <DOE_DTE></DOE_DTE>
>  </ROW>
>
> While there are a few thousand rows, there are only a few distinct values for CONTRACTOR. I am working on a stylesheet that will perform various counts of data in these elements.
>
> I thought I would get the distinct values for CONTRACTOR with the distinct-values() function and the supply each distinct value as a parameter to an xsl:call-template, like this:
>
> <xsl:for-each select="distinct-values(ROWSET/ROW/CONTRACTOR)">
>  <xsl:sort select="." />
>  <xsl:call-template name="contractor-row">
>     <xsl:with-param name="contractor" select="." />
>  </xsl:call-template>
> </xsl:for-each>
>
> The context node where this is done is "/" and ROWSET in the root element.
>
> When the xsl:call-template is executed, Saxon gives this error:
>
> "XPTY0020: Finding root of tree: the context item is not a node"
>
> Here is the relevant part of the called template:
>
> <xsl:template name="contractor-row">
>  <xsl:param name="contractor" />
>  <tr height="17" style='height:12.75pt'>
>    <td height="17" class="xl28" style='height:12.75pt;border-top:none'>
>      <xsl:value-of select="$contractor" />
>    </td>
>    <td class="xl26" align="right" style='border-top:none;border-left:none' x:num="">
>      <xsl:value-of select="count(/ROWSET/ROW[CONTRACTOR='$contractor'])" />
>    </td>
>  ... more template here ...
> </xsl:template>
>
> The processor emits this error message when evaluating
> count(/ROWSET/ROW[CONTRACTOR='$contractor'])
>
> Now if I change the argument to the count() function to read:
> count(document('path-to-xml-file')/ROWSET/ROW[CONTRACTOR='$contractor'])
>
> The error goes away. It also returns a value of '0' (zero) for every call of the function.
>
> Can anyone shed light on any part of this (to me, at least) puzzle?
>
> Thanks.
>
> --
> Charles Knell
> cknell@xxxxxxxxxx - email