Subject: Re: [xsl] the difference between xsl:variable and xsl:param From: Trevor Nash <tcn@xxxxxxxxxxxxx> Date: Tue, 12 Feb 2002 13:56:27 +0000 |
Kit, >Hi, can everyone tell me the difference between xml:param and xml:variable, >i got pretty confused over the use of the two. I think you mean xsl:param and xsl:variable. The important difference is that the value of an xsl:param could be set outside the context in which it is declared. For example if you see: <xsl:template ...> <xsl:param name="p" select="'x'" /> <xsl:variable name="v" select="'y'" /> ... then you know that $v will always give you the string 'y' (note the double set of quotes). But for $p the string 'x' is only a default: you will see a different value if the template is invoked with either xsl:apply-templates or xsl:call-template which contains an instruction such as: <xsl:with-param name="p" select="'not x'" /> <xsl:param> may also be used outside xsl:template, at the top level in the stylesheet. The value of such a parameter may be set when the XSLT processor is called. How this is done depends on the processor and whether you call it from the command line or by program. > Secondly, can anyone tell me >how to pass a variable to an xsl (e.g. <xsl:template >match=".//c="?variable"/> where as ?variable is pass down to the stylesheet >through javascript. I am not sure what you are trying to do with that match pattern. What do you think it means? Given something like <xsl:stylesheet ...> <xsl:param name="variable" /> <xsl:template match="c[. = $variable]" ... With Saxon from the command line you would say: saxon in.xml style.xsl variable=z to select all c nodes whose content was 'z' , e.g. <c>z</c> To see how to do this from Javascript, have a look at the documentation for your processor. Regards, Trevor Nash -- Traditional training & distance learning, Consultancy by email Melvaig Software Engineering Limited voice: +44 (0) 1445 771 271 email: tcn@xxxxxxxxxxxxx XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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