Subject: Re: [xsl] Multi-level grouping problem. MSXML bug, maybe? From: Jeni Tennison <jeni@xxxxxxxxxxxxxxxx> Date: Thu, 9 May 2002 10:10:02 +0100 |
Hi Mark, > I want the output to look like: > > <?xml version="1.0" encoding="iso-8859-1"?> > <CS> > <Co Type="F" SubType="S"> > <DG Code="V" /> > <DG Code="F" /> > </Co> > <Co Type="F" SubType="T"> > <DG Code="V" /> > </Co> > </CS> > > That is, I'm grouping by TYPE, SUB_TYPE, and D_CODE. Yes, you've got two levels of grouping: one by TYPE and SUB_TYPE, and one by D_CODE. Your key for grouping by TYPE and SUB_TYPE looks fine: > <xsl:key name="row-by-type-subtype" match="row" > use="concat(TYPE/@value, '|', SUB_TYPE/@value)"/> But your key for grouping by D_CODE is off. You have: > <xsl:key name="d-by-type-subtype" match="D_CODE" > use="concat(../TYPE/@value, '|', ../SUB_TYPE/@value)"/> This groups the D_CODE elements by their row's TYPE and SUB_TYPE; in other words, it does exactly the same as the first key, except grouping the D_CODE elements rather than the rows. You want to group the *rows* by their D_CODE values. And because it's the second level in the grouping, you need to incorporate the TYPE and SUB_TYPE into that as well. So the key should look like: <xsl:key name="row-by-d-code" match="row" use="concat(TYPE/@value, '|', SUB_TYPE/@value, '|', D_CODE/@value)"/> Then you just do what you're doing, but use this key to filter the rows with a particular TYPE and SUB_TYPE down to those with a unique D_CODE as well: <xsl:for-each select="/recordset/row[count(. | key('row-by-type-subtype', concat(TYPE/@value, '|', SUB_TYPE/@value))[1]) = 1]"> <xsl:variable name="type" select="TYPE/@value"/> <xsl:variable name="subtype" select="SUB_TYPE/@value"/> <xsl:variable name="type-subtype" select="concat($type, '|', $subtype)" /> <Co Type="{$type}" SubType="{$subtype}"> <xsl:for-each select="key('row-by-type-subtype', $type-subtype) [count(.|key('row-by-d-code', concat($type-subtype, '|', D_CODE/@value))[1])=1"> <DG Code="{D_CODE/@value}" /> </xsl:for-each> </Co> </xsl:for-each> ---- The XSLT 2.0 version: <xsl:for-each-group select="/recordset/row" group-by="concat(TYPE/@value, '|', SUB_TYPE/@value)"> <Co Type="{TYPE/@value}" SubType="{SUB_TYPE/@value}"> <xsl:for-each-group select="current-group()" group-by="D_CODE/@value"> <DG Code="{D_CODE/@value}" /> </xsl:for-each-group> </Co> </xsl:for-each-group> Cheers, Jeni --- Jeni Tennison http://www.jenitennison.com/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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