Re: when to use 'as' attribute on a variable
Thanks for these precisions. Which functions do you think about (that requires argument element to live in a tree)? Well the most noticable one is the Xpath expression / which selects the root of the current tree if you are in one but raises an error if not, / is root() instance of document-node() rather than (the perhaps more natural) root(). keys are restricted to documents and temporary trees (both of which always have a document node as root) other edge casses involving parentless attribute nodes: The XDM data model does not permit an attribute node with no parent to have a typed value that includes a namespace-qualified name, that is, a value whose type is derived from xs:QName or xs:NOTATION. This restriction is imposed because these types rely on the namespace nodes of a containing element to resolve namespace prefixes. Therefore, it is an error to validate a parentless attribute against such a type. David ________________________________________________________________________ This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________
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