Subject: Re: [xsl] Upgrade from XSLT1 From: "Liam R E Quin liam@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Tue, 27 May 2014 17:56:13 -0000 |
On Tue, 2014-05-27 at 17:26 +0000, Vasudev Kandhadai vasu.kandhadai@xxxxxxxxx wrote: > I am assuming that the coding paradigm is slightly different in XSLT3.. The > approach on how to write templates, the restrictive xpaths etc , could be > backwards incompatible etc.. In most cases your XSLT 1 stylesheets will work in an XSLT 2 processor unchanged. They should also work in an XSLT 3 processor, but since XSLT 3 is a draft (albeit in last call for comments) there are, strictly speaking, not yet any conformant XSLT processors as the spec isn't finished. So start by making a test suite. E.g. take a large set of documents, run them through XSLT 1 and then again through the newer Saxon, and compare the results. Then you can try changing version="1" to version="2" on the xsl:stylesheet element and test again. After that, one approach would be to rewrite only code you change; another would be to profile and work on any performance issues; another would be to do larger changes. Adding "as=" attributes to xsl:param and xsl:varaible will often find bugs and may give noticeable performance improvements. > With XSLT3, we may consider removing the SAX splitters, as it may no longer > be used. XSLT3 will probably take care of the memory issues with HUge XML > files. It's possible, it depends on the value of "huge" :) One difference with XSLT 3 is that you'll be able to pass around "function items" e.g. as a param to a template, which gives a different way to override functionality. Liam -- Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/ Pictures from old books: http://fromoldbooks.org/ Ankh: irc.sorcery.net irc.gnome.org freenode/#xml The barefoot typographer
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