Subject: Re: [xsl] Unicode and child element From: David Carlisle <davidc@xxxxxxxxx> Date: Fri, 29 Aug 2008 13:06:32 +0100 |
Ken, > The Unicode characters  through  are specifically > "non-characters", which means they must not be used to represent > characters in a data stream between sender and receiver. This means > that two trading partners must not use them in XML documents, which > makes them available for XSLT users for this character mapping > technique without interfering with user data. I'm not sure I see it that way, these non characters are not actually banned by XML systems so (like private use characters) their use (or non use) is constrained by convention rather than technology. Given that XSLT files are XML, it would see that this convention would suggest that they not be used here as well. If you say that the convention will ensure that this character definitely won't appear in an XML source file, what happens if someone uses the XSLT document as input? > I'm not aware of people actually using private characters for > interchange We (in MathML 1) got our figures severely wrapped for using private use characters for math (because the math characters were not added until Unicode 3.1 and 3.2, many years later) on the grounds that specifying "private" uses for private use characters would greatly hamper usage of the standard in Asia, particularly, where apparently a certain well known operating system used lage chunks of the private use area for commonly used document code pages..... > Nevertheless using non-characters for this XSLT stylesheet character > mapping seems to me to be better guidance than using private-use > characters. But could be construed as breaking the convention that says that non-characters not be used in documents. David ________________________________________________________________________ The Numerical Algorithms Group Ltd is a company registered in England and Wales with company number 1249803. The registered office is: Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom. This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. ________________________________________________________________________
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