Subject: Re: [xsl] Identifying unique attribute values in nested sibling elements From: "Mark" <mark@xxxxxxxxxxxx> Date: Thu, 29 Sep 2011 05:05:12 -0700 |
Thanks all, Mark
In processing XML similar to the fragment below, I have identified that within its <Set> element, five <Stamp> elements are of interest (because they all contain <Formats se-tenant="1">).
how can I gather all of the <Value> elements from the subsequent <Stamp> elements of interest while ignoring:
(1) <Value> elements identical to those already found, and
(2) <Value> elements in <Stamp> elements of no interest?
For the given XML fragment, I want to find these four <Value> elements and ignore the duplicated <Value> element:
Unique:
kc-value="14"
kc-value="18"
kc-value="18" h-value="50"
kc-value="0" l-value="A"
Duplicate: kc-value="14"
~/t/ftemp $ cat mark.xml <?xml version="1.0" encoding="UTF-8"?> <Set> <!--possibly other unrelated <Stamp> elements here--> <Stamp> <CatNumbers pofis-number="1"/> <Value kc-value="14"/> <Formats se-tenant="1"/> </Stamp> <!--possibly other unrelated <Stamp> elements here--> <Stamp> <CatNumbers pofis-number="2"/> <Value kc-value="18"/> <Formats se-tenant="1"/> </Stamp> ..... <!--possibly other unrelated stamp elements--> <Stamp> <CatNumbers pofis-number="3"/> <Value kc-value="18" h-value="50"/> <Formats se-tenant="1"/> </Stamp> <!--possibly other unrelated <Stamp> elements here--> <Stamp> <CatNumbers pofis-number="4"/> <Value kc-value="14" /> <Formats se-tenant="1"/> </Stamp> <!--possibly other unrelated <Stamp> elements here--> <Stamp> <CatNumbers pofis-number="5"/> <Value kc-value="0" l-value="A" /> <Formats se-tenant="1"/> </Stamp> </Set> ~/t/ftemp $ xslt2 mark.xml mark.xsl Unique: kc-value=14 kc-value=18 kc-value=18 h-value=50 kc-value=0 l-value=A Duplicates: kc-value=14 ~/t/ftemp $ cat mark.xsl <?xml version="1.0" encoding="UTF-8"?> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:m="urn:X-Mark" exclude-result-prefixes="m" version="2.0"> <xsl:output method="text"/>
<!--compose a string of attribute names and their values; avoid the possibility of co-incidental string values;--> <xsl:function name="m:attrs"> <xsl:param name="this"/> <xsl:value-of> <xsl:for-each select="$this/@*"> <xsl:sort select="name(.)"/> <xsl:value-of select="name(.),'',.,''"/> </xsl:for-each> </xsl:value-of> </xsl:function>
<!--common reporting--> <xsl:function name="m:report"> <xsl:param name="Stamp"/> <xsl:for-each select="$Stamp"> <xsl:for-each select="Value/@kc-value"> <xsl:text>kc-value=</xsl:text> <xsl:value-of select="."/> </xsl:for-each> <xsl:for-each select="Value/@* except Value/@kc-value"> <xsl:text> </xsl:text> <xsl:value-of select="name(.)"/>=<xsl:value-of select="."/> </xsl:for-each> <xsl:text> </xsl:text> </xsl:for-each> </xsl:function>
<xsl:template match="Set"> <!--start with the population desired--> <xsl:text>Unique: </xsl:text> <xsl:for-each-group select="Stamp[Formats/@se-tenant=1]" group-by="m:attrs(Value)"> <xsl:value-of select="m:report(.)"/> </xsl:for-each-group> <!--duplicates have more than one member--> <xsl:text>Duplicates: </xsl:text> <xsl:for-each-group select="Stamp[Formats/@se-tenant=1]" group-by="m:attrs(Value)"> <!--there are duplicates if a second exists--> <xsl:for-each select="current-group()[2]"> <xsl:value-of select="m:report(.)"/> </xsl:for-each> </xsl:for-each-group> </xsl:template>
</xsl:stylesheet> ~/t/ftemp $
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