Subject: Re: [xsl] Use of data() function From: Florent Georges <lists@xxxxxxxxxxxx> Date: Sun, 2 Mar 2008 14:02:16 +0100 (CET) |
Mukul Gandhi wrote: > test="" would test for EBV of the expression in "". That is > the semantics of test="" syntax. Yes. As well as for a few XPath constructs. The idea is that from any sequence you want to have just 'yes' or 'no.' You don't have to provide an expression that results in a singleton xs:boolean. The rules are something like: - if empty($seq) -> false - if non-empty sequence of nodes -> true - if singleton number -> flase if 0 or NaN - if singleton string or URI -> false if '' - if singleton boolean -> that boolean's value - else: type error See http://www.w3.org/TR/xpath20/#id-ebv for details. Note in particular that you can't have a sequence of atomic values. Without the EBV, you should provide a singleton xs:boolean each time you use xsl:if, if, xsl:when, and, predicates, etc. For instance test="@married" would be an error; you should say test="exists(@married)" or test="xs:boolean(@married)" instead. Regards, --drkm _____________________________________________________________________________ Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail http://mail.yahoo.fr
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