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Re: [xsl] What is the Core of XSLT?
Subject: Re: [xsl] What is the Core of XSLT? From: Dimitre Novatchev <dnovatchev@xxxxxxxxx> Date: Sat, 29 Mar 2014 17:07:42 -0700 |
On Sat, Mar 29, 2014 at 4:13 PM, Abel Braaksma (Exselt) <abel@xxxxxxxxxx> wrote: > I don't think you can do everything > with XSLT 1.0 that you can do now with a subset that does not include > xsl:if (xsl:choose can be implemented in xsl:ifs). If I understand this correctly, it says that <xsl:choose> cannot be implemented if there is no <xsl:if> instruction available. But it can. An <xsl:choose> with N outcomes can be expressed in XSLT 2 as a single: <xsl:apply-templates select="my:special-node"/> and N templates of the form: <xsl:template match="my:special-node[condition]"> <!-- The wanted code here --> <xsl:template> In XSLT 1.0 we sometimes can only specify the condition within a predicate in the "select" attribute of the <xsl:apply-templates> instruction. Thus, an <xsl:choose> with N outcomes can be implemented using N <xsl:apply-templates> instructions of the form: <xsl:apply-templates select="my:special-node[conditionK]"/> and N templates -- exactly as in the case for XSLT 2.0 above. This is the full proof that XSLT conditional instructions can be eliminated in any version of XSLT. BTW, I have quite a lot of experience writing complex transformations without any XSLT conditional instructions. :) Cheers, Dimitre Novatchev
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