Subject: Re: xsl:variable {RE: XSL to handle display mutiple pages} From: Mike Brown <mike@xxxxxxxx> Date: Tue, 7 Nov 2000 17:08:00 -0700 (MST) |
Xu, Xiaocun wrote: > I read in the book that once set, xsl:variable is non-changable. Correct, for as long as the variable is in scope. When/where the variable goes out of scope, you can assign it to something else. > How do I have a changable variable, xsl:param? No, xsl:param lets you assign a default value. It is usually used in conjuction with xsl:with-param to pass a value to a template where the variable would have otherwise been out of scope. Understand that a variable is a *name* assigned to an *object* of one of the basic types: boolean, number, string, node-set, result tree fragment. When we talk about a variable's "value" we usually mean the object, because a variable's "string-value" is the object's string-value, and is a distinct concept. xsl:variable or xsl:param just provide ways to bind a name to an object. Once such a binding is made, you cannot bind the variable to another name. What is it you are trying to do? Chances are, you are trying to do procedural programming in a functional, declarative language, and there's another way to accomplish the same result that doesn't rely on variable rebinding. - Mike ____________________________________________________________________ Mike J. Brown, software engineer at My XML/XSL resources: webb.net in Denver, Colorado, USA http://www.skew.org/xml/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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