[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XPath variables - immutable or not?
At least in Jaxen, we view variables as, well, variable. Users use them to create sort of 'prepared-statements' that can be parameterized upon evaluation. We allow a user to swap out the VariableContext (the name->value lookup index) between evaluations. But, we might be taking a liberal view, because we also allow users to swap out the FunctionContext and NamespaceContext at will. -bob On Wed, 13 Nov 2002 AndrewWatt2000@a... wrote: > I love the way that W3C specifications can sometimes throw up disconnected > questions. > > In the XForms 1.0 CR the phrase, "XPath variables that change in value from > one recalculate to the next ..." started me thinking about just what I think > I know about "XPath variables". > > Tacitly, I think I had assumed that "XPath variables" are immutable, possibly > because I typically meet variables in connection with XPath expressions in > the context of XSLT 1.0. > > A quick look through XPath 1.0 REC and XPath 2.0 WD revealed remarkably > little information about "XPath variables". I certainly couldn't find > anything to confirm my earlier tacit assumption that they are immutable. > > In fact, I am even beginning to wonder if XPath variables actually exist. > .... Not, of course, that that is a question of life or death! :) > > Andrew Watt > > > ----------------------------------------------------------------- > The xml-dev list is sponsored by XML.org <http://www.xml.org>, an > initiative of OASIS <http://www.oasis-open.org> > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > To subscribe or unsubscribe from this list use the subscription > manager: <http://lists.xml.org/ob/adm.pl> > -- Bob McWhirter bob@w... The Werken Company http://werken.com/
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