December 2002
Intermediate to advanced
672 pages
16h 53m
English
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Ignoring Duplicate Elements
Problem
You want to select all nodes that are unique in a given context based on uniqueness criteria.
Solution
Selecting unique nodes is a common application of the
preceding and preceding-sibling
axes. If the elements you select are not all siblings, then use
preceding. The following code produces a unique
list of products from SalesBySalesperson.xml:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/> <xsl:template match="/"> <products> <xsl:for-each select="//product[not(@sku=preceding::product/@sku)]"> <xsl:copy-of select="."/> </xsl:for-each> </products> </xsl:template> </xsl:stylesheet> If the elements are all siblings then use preceding-sibling. <products> <product sku="10000" totalSales="10000.00"/> <product sku="10000" totalSales="990000.00"/> <product sku="10000" totalSales="1110000.00"/> <product sku="20000" totalSales="50000.00"/> <product sku="20000" totalSales="150000.00"/> <product sku="20000" totalSales="150000.00"/> <product sku="25000" totalSales="920000.00"/> <product sku="25000" totalSales="2920000.00"/> <product sku="30000" totalSales="5500.00"/> <product sku="30000" totalSales="115500.00"/> <product sku="70000" totalSales="10000.00"/> </products> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/> <xsl:template match="/"> <products> <xsl:for-each ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.