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Re: XPath LT & GT: problems when comparing strings!

From: Martin Honnen <mahotrash@-----.-->
To: NULL
Date: 9/5/2006 3:10:00 PM




Dmitry Bond. wrote:


> Something strage happens when I try to compare a string value (value of
> XML attribute) with ">", "<" or ">=", "<=" operators. Looks like only
> "=" works for strings comparison in MSXML. :-(

Right, XPath 1.0 does not support < or > comparison of strings, instead 
those operators always convert their operands to the XPath number type 
and then compare numbers.

With MSXML there is an extension function provided for string comparison 
e.g.

var xmlDocument = new ActiveXObject('Msxml2.DOMDocument.4.0');
xmlDocument.loadXML('<god>Kibo</god>');

xmlDocument.setProperty('SelectionNamespaces', 
'xmlns:ms="urn:schemas-microsoft-com:xslt"');

xmlDocument.selectNodes(
'god[ms:string-compare(., "Xibo") <= -1]').length

gives 1

See
<http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/20616b82-9e27-444c-b714-4f1e09b73aee.asp>
-- 

	Martin Honnen --- MVP XML
	http://JavaScript.FAQTs.com/

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