Subject: [xsl] XSLT and Unicode character functions --XSLT v 1.1?-- From: Eric Vermetten <EVermetten@xxxxxxxxxxxxx> Date: Tue, 30 Jan 2001 15:35:41 -0000 |
Hello all, XML/XSLT works with Unicode, and while you can equate any given character with one other special one like this: <xsl:variable name="test-char" select="€" > <xsl:if test="substring(., 1 ) = $test-char" > <!-- do something usefull here --> </xsl:if> It is not possible do a range of tests based on unicode numbers. Also, it is not possible to do simple comparisons of characters based on their Unicode number, like: <xsl:if test="'a' < 'b'" > The above test, of course, does not do character comparison in XSLT because the string arguments 'a' and 'b' are convered, by an implicit call of the number() function, to NaN. What does work is the use extension functions like the two below: <msxsl:script implements-prefix="local" language="JScript"> <![CDATA[ function UNInumber(xmlchar) { var s = new String(xmlchar); return s.charCodeAt(0); } function num2char(num) { var s = String.fromCharCode(num) return s; } ]]> </msxsl:script> Now you can say: <xsl:if test="local:UNInumber('a') < local:UNInumber('b') > These functions are very minimalistic and have functional equivalent counterparts in many languages such as Visual Basic, C++ and Java. _______________________________________________________________ My question is simple: XML/XSLT is, internally (and externally through different encodings), based on Unicode character handling. Then wouldn't it be logical and desirable that the two functions given here be part of the standard XSLT function reportoire? (e.g. XSLT v1.1)? Adding these two functions would enhance portability and, so I would presume, implementation can be done in a jiffy. I've been reading the XSL-digest list for quite some time now and that is why I'm asking you, XSLT/XML users, developers alike, for your thoughts on this. Regards, Eric Vermetten P.S. For anyone outside the 12 designated countries, choose as test-char £ ¥ $ or any other appropiate alternative! XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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