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Re: [xsl] Multiple elements condition
Subject: Re: [xsl] Multiple elements condition From: Florent Georges <lists@xxxxxxxxxxxx> Date: Fri, 31 Aug 2007 11:11:42 +0200 (CEST) |
David Carlisle wrote: Hi > > exists(para[2]) and not(exists(para[3])) > > or > > exists(para[2]) and empty(para[3]) > they both always look for the 2nd and 3rd element but you > don't need t0 look for the 3rd if the 2nd isn't there.... I am not sure what you mean by /always/. I expect my processor to use short-cut boolean connectors. And if I understand correctly net.sf.saxon.expr.BooleanExpression, Saxon does so. On the other hand, it seems (if I understand correctly the code) that the optimizer will rewrite: xxx and my:user-function(yyy) into: if (xxx) then my:user-function(yyy) else false() I don't understand why this rewrite is intended to, except for optimization, but if we have short-cut evaluation yet I don't see the point here... I should have missed something. Regards, --drkm _____________________________________________________________________________ Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail
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