Subject: Re: [xsl] Extracting a list of unique base urls from anchors in a html docu ment. From: David Carlisle <davidc@xxxxxxxxx> Date: Thu, 13 Sep 2001 19:06:02 +0100 |
> I'm propably wrong, I'm afraid so:-) > The only difference is that my template doesn't compare the attribute values > as-is, but applies a substring before doing so. No the string function completely changes the sematics of =. If you have an XPath test of the form (node-set a) = (node-set b) then it is true if _any_ node in set a has a value equal to any node in set b. That's what you have here: @country=preceding-sibling::city/@country @country and preceding-sibling::city/@country both select node sets. If you have (string a) = (string b) then this is true if the string a equals to the string b. that's what you have here: substring-before(@href,'#')=substring-before(preceding::a/@href,'#') as substring-before always returns a string. substring-before requires a string as its first argument and if you give it a node set (as here) then it takes the string value of the first node (in document order) of the node set. @href has at most one node but preceding::a/@href has perhaps many node but whatever the current node the first node in that collection is the first href attribute on an a element that occurs in the document. David _____________________________________________________________________ This message has been checked for all known viruses by Star Internet delivered through the MessageLabs Virus Scanning Service. For further information visit http://www.star.net.uk/stats.asp or alternatively call Star Internet for details on the Virus Scanning Service. XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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