Subject: Result Tree Fragments & Variables From: lachance@xxxxxxxxxxxxxxxxx (Francois Lachance) Date: Sat, 1 Apr 2000 08:57:02 -0500 (EST) |
David, Striving for a bit more comprehension here by referring to the recommendation: XSLT 11.1 A variable may be bound to a result tree fragment instead of one of the four basice data-types (string, number, boolean, node-set). <!-- this is why I thought variables could be bound to node-sets --> XSLT 11.1 A result tree fragment represents a fragment of the result tree. A result tree fragment is treated equivalently to a node-set that contains just a single root node. <!-- this is rephrased by David --> > but any use of xsl:variable with non empty content produces a result tree > fragment so although this is basically the same as a node set > containing one node with child zzzz nodes in sorted order, > you can not access those nodes by any standard means. XSLT 11.1 it is not permitted to use the /, //, and [] operators on result tree fragments. When a permitted operation is performed on a result tree fragment, it is performed exactly as it would be on the equivalent node-set. <!-- But aren't "permitted operations" standard, unless one means by standard most currently in use by stylesheet writers? --> XSLT 11.2 If the variable-binding element does not have a select attribute and has non-empty content (i.e. the variable-binding element has one or more child nodes), then the content of the variable-binding element specifies the value. <!-- I read here a description of one possible type of binding. I intrepret this to mean that the absence/presence of the select attribute is decisive here in determining the data-type which will result from the binding. --> XSLT 11.2 The content of the variable-binding element is a template, which is instantiated to give the value of the variable. The value is a reult tree fragment equivlat to a node-set containing just a single root node have as children the sequence of nodes produced by instantantiating the template. <!-- I take this to mean that other types of binding are possible when the select attribute is used with the xsl:variable element. A variable may be bound to a node-set. --> Is it the case that <xsl:variable select="*"/> will bind the variable to a node set? -- Francois Lachance Post-doctoral Fellow projet HYPERLISTES project http://www.humanities.mcmaster.ca/~hyplist/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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