Re: [xsl] Multi-level grouping problem. MSXML bug, maybe?

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

At 2002-05-08 23:04 -0500, mpfingstler@xxxxxxxxxxxxxxxxxxxx wrote:
> Also, is there a better way to do a
> multiple "group-by"?

"Better" is difficult to measure not knowing what other criteria you have.

Here is a different solution based on variables instead of keys.  Since you 
don't need a node-set of the groups, you could consider using the solution 
below.

I find using localized variables of only those candidates of a particular 
group make multi-level subgrouping easier to write and maintain.

I hope this helps.

................. Ken

t:\ftemp>type mark.xml
<?xml version="1.0"?>
<recordset>
   <row>
      <CODE value="000001"/>
      <CATEGORY_CODE value="A"/>
      <SUB_CATEGORY_CODE value="E"/>
      <ID value="ID01"/>
      <TYPE value="F"/>
      <SUB_TYPE value="S"/>
      <D_CODE value="V"/>
      <D_DESC value=""/>
   </row>
   <row>
      <CODE value="000001"/>
      <CATEGORY_CODE value="A"/>
      <SUB_CATEGORY_CODE value="L"/>
      <ID value="ID02"/>
      <TYPE value="F"/>
      <SUB_TYPE value="S"/>
      <D_CODE value="V"/>
      <D_DESC value=""/>
   </row>
   <row>
      <CODE value="000001"/>
      <CATEGORY_CODE value="B"/>
      <SUB_CATEGORY_CODE value="E"/>
      <ID value="ID03"/>
      <TYPE value="F"/>
      <SUB_TYPE value="T"/>
      <D_CODE value="V"/>
      <D_DESC value=""/>
   </row>
   <row>
      <CODE value="000002"/>
      <CATEGORY_CODE value="S"/>
      <SUB_CATEGORY_CODE value="L"/>
      <ID value="ID04"/>
      <TYPE value="F"/>
      <SUB_TYPE value="S"/>
      <D_CODE value="F"/>
      <D_DESC value=""/>
   </row>
</recordset>

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

<xsl:output indent="yes"/>

<xsl:template match="/">
  <CS>
    <xsl:variable name="rows" select="/recordset/row"/>
    <xsl:for-each select="$rows">
      <xsl:if test="generate-id(.)=
                    generate-id($rows[TYPE/@value=current()/TYPE/@value and
                                  SUB_TYPE/@value=current()/SUB_TYPE/@value])">
        <Co Type="{TYPE/@value}" SubType="{SUB_TYPE/@value}">
          <xsl:variable name="types"
                        select="$rows[TYPE/@value=current()/TYPE/@value and
                                  SUB_TYPE/@value=current()/SUB_TYPE/@value]"/>
          <xsl:for-each select="$types">
            <xsl:if test="generate-id(.)=
                   generate-id($types[D_CODE/@value=current()/D_CODE/@value])">
              <DG Code="{D_CODE/@value}"/>
            </xsl:if>
          </xsl:for-each>
        </Co>
      </xsl:if>
    </xsl:for-each>
  </CS>
</xsl:template>

</xsl:stylesheet>

t:\ftemp>saxon -o mark.out mark.xml mark.xsl

t:\ftemp>type mark.out
<?xml version="1.0" encoding="utf-8"?>
<CS>
   <Co Type="F" SubType="S">
      <DG Code="V"/>
      <DG Code="F"/>
   </Co>
   <Co Type="F" SubType="T">
      <DG Code="V"/>
   </Co>
</CS>
t:\ftemp>rem Done!


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G. Ken Holman                mailto:gkholman@xxxxxxxxxxxxxxxxxxxx
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