FW: Optimisation (was Re: Aggregate)
-----Original Message----- From: Kay Michael Sent: 17 November 2000 17:17 To: 'Jeni Tennison' Subject: RE: Optimisation (was Re: Aggregate) > Does Saxon recognise XPaths with more than one predicate to apply > this? For example: > > $x[foo] > $x[foo] > $x[foo][bar] > For expressions it works with any number of predicates. In fact it works for any numeric predicate whose value doesn't depend on the context node or context position (it just terminates the loop when a matching node is found). So $x[$y] where $y is numeric will also work. For patterns there's a similar optimisation, but this applies only to patterns of the form para, with a single predicate having the constant value 1, but appearing anywhere in the path, e.g. section/para/@name is fine. Mike Kay XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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