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RE: [xsl] match selection formulae
Subject: RE: [xsl] match selection formulae From: "Michael Kay" <mhkay@xxxxxxxxxxxx> Date: Fri, 7 Sep 2001 16:31:06 +0100 |
> So if i'm reading you correctly, the following: > > match="foo[@bar!='']" > > 1. <foo>x</foo> > 2. <foo bar="">x</foo> > 3. <foo bar="x">x</foo> > > should match #3 only? yes > > and are these two expressions equivalent? > match="foo[@bar!='']" > match="foo[not(@bar='')]" <foo/> matches the second but not the first. Always read [node op value] as [exists $n in node such that $n op value]. So the first is true if there is an @bar attribute and its value isn't ""; the second is true if there isn't an @bar attribute whose value is "". Mike Kay > > > > > -----Original Message----- > From: Michael Kay [mailto:mhkay@xxxxxxxxxxxx] > Sent: Friday, September 07, 2001 5:28 AM > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: RE: [xsl] match selection formulae > > > > In my naiveity, I thought that @rend='' would be the > > equivalent of testing for > > the non-existence of an attribute - however, not(@rend) > > doesn't appear to work either. > > boolean(@rend) is true if the attribute exists > not(@rend) is true if the attribute doesn't exist > @rend='' is true if the attribute exists and has the value "". > > Mike Kay > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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