Subject: Re: [xsl] generating a repeatable unique id From: Jeni Tennison <mail@xxxxxxxxxxxxxxxx> Date: Mon, 30 Jul 2001 10:03:00 +0100 |
Hi Sebastian, > Hmm, interesting idea. My real problem with that is that I am inside > a web server at transformation time, and I dont really want it > scribbling temporary files. Apart from anything else, it *could* be > weeks before someone hits the link button which activates the > request for a section. Of course, this screws me anyway, as the > original document might have changed... oh yuck. Since you're dealing with documents that might change, perhaps you could generate links that look like XPaths. These would be more stable than a count of all preceding elements of the same name. For example: <xsl:for-each select="ancestor-or-self::*"> <xsl:value-of select="name()" /> <xsl:text />[<xsl:number />]<xsl:text /> <xsl:if test="position() != last()">/</xsl:if> </xsl:for-each> (or, more efficiently, pass down path as you journey down the tree rather than creating it from scratch for each element.) This would create things like: chapter[1]/section[2]/div[3] Of course you should use different separators to make it a valid ID so that it can be an HTML anchor, e.g.: chapter1.section2.div3 Another idea would be to only use these kind of paths from the nearest available element with an ID attribute. So if section[2] actually has an ID of "PartII" then you could have: id('PartII')/div[3] or (again) something similar that could be a valid ID. This would make the IDs more stable over time. Cheers, Jeni --- Jeni Tennison http://www.jenitennison.com/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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