Subject: Re: [xsl] declaring global variable in XSL! From: "Michael Beddow" <mbnospam@xxxxxxxxxxx> Date: Tue, 21 Aug 2001 07:51:48 +0100 |
On Tuesday, August 21, 2001 5:58 AM Tim Watts wrote: > Also, I think I remember somone saying recently that you cannot declare a > *global* variable based on a condition. Sorry, that was me in mode="wrong-end-of stick", drawing an incorrect conclusion from the correct premiss that the XSLT content model doesn't allow <xsl:if> or <xsl:choose> at the top level of the sheet, where global assignments need to be made. In a follow-up, Oleg drew my attention to the extremely rich content model of <xsl:variable> and pointed out that the way to achieve conditional initialisation of a global was to generate an RTF by using <xsl:choose> within the content of a <xsl:variable> at top level. As a result I think I now understand why and how the two possible methods of initialising a variable are significantly different. Other responses off-list confirmed that the technique I had figured out myself was OK for my particular case, namely using the union operator on two node sets, where one set will always be empty if the condition that interested me is true. But that's much less general than the RTF approach. Michael --------------------------------------------------------- Michael Beddow http://www.mbeddow.net/ XML and the Humanities page: http://xml.lexilog.org.uk/ --------------------------------------------------------- XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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