Subject: Re: [xsl] Need help with XSL and XPath From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx> Date: Tue, 23 May 2006 06:42:17 +0200 |
I've got an XML document with multiple entries of <element> as shown below. The <name>s are unique, but the <number> can be same for mulpitle entries of <element>. The XML document isn't sorted in anyway. ... Now I need the XSL stylesheet to print out something like this:
number 1 name1 name4 name7
number 25 name2 name3
number 100 name5 name6
So each "number X" is only printed once and then all the <element>s that have the number X in the <number> tags are printed below that. Then the next biggest number is printed and so on.
Here's one way to do it: ... <xsl:for-each select="data/element[not(number = following::number)]">
Note that using axes is the slowest of the three methods of doing grouping: axes, variables and keys ... but that's not the objective of my post.
<xsl:sort select="number"/>
The problem with the above is that the default data type is "text", so when I put Lassi's test data into Jay's structure, I get this incorrect result:
T:\ftemp>xslt jay.xml jay.xsl con <?xml version="1.0" encoding="utf-8"?> <out> <entry number="1"> <name>Oscar</name> <name>Mike</name> </entry> <entry number="100"> <name>Tom</name> <name>Dick</name> <name>Harry</name> </entry> <entry number="25"> <name>Bob</name> <name>George</name> </entry> </out> T:\ftemp>
in order for the values to not be treated as strings. I have this in one of my students' exercises (hockey standings) in order to trip them up in their reporting.
So a complete solution, not using axes and not needing to have a variable would be as posted below. On large data sets this would work very much faster than using axes.
<data> <element> <name>Oscar</name> <number>1</number> </element> <element> <name>Mike</name> <number>1</number> </element> <element> <name>Bob</name> <number>25</number> </element> <element> <name>George</name> <number>25</number> </element> <element> <name>Tom</name> <number>100</number> </element> <element> <name>Dick</name> <number>100</number> </element> <element> <name>Harry</name> <number>100</number> </element> </data>
T:\ftemp>type jay.xsl <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/"> <out> <xsl:for-each select="data/element[generate-id(.)= generate-id(key('nbr',number)[1])]"
<xsl:sort select="number" data-type="number"/> <entry number="{number}"> <xsl:copy-of select="key('nbr',number)/name"/> </entry> </xsl:for-each> </out> </xsl:template>
T:\ftemp>xslt jay.xml jay.xsl con <?xml version="1.0" encoding="utf-8"?> <out> <entry number="1"> <name>Oscar</name> <name>Mike</name> </entry> <entry number="25"> <name>Bob</name> <name>George</name> </entry> <entry number="100"> <name>Tom</name> <name>Dick</name> <name>Harry</name> </entry> </out> T:\ftemp>
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