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In XSLT 2.0, the collation used by xsl:key is not necessarily Unicode
codepoint order. To build an index, you need to store the key value as a
sequence of collation units, not as a sequence of Java chars or Unicode
codepoints. So I suspect that what you really want is the highest collation
unit in the particular collation used for the key in question.
(Actually, xsl:key only supports equality semantics, not ordering semantics.
But I can see that you probably want to implement indexes that also support
ordering semantics. It's likely that these too would need to be
collation-sensitive.)
Michael Kay
http://www.saxonica.com/
> -----Original Message-----
> From: Alan Gutierrez [mailto:alan-xml-dev@engrm.com]
> Sent: 13 August 2005 12:06
> To: Derek Denny-Brown
> Cc: xml-dev@lists.xml.org
> Subject: Re: [xml-dev] XML Max Character Value
>
> * Derek Denny-Brown <derekdb@microsoft.com> [2005-08-13 01:29]:
>
> > In java, 0xFFFE or 0xFFFF should work. They aren't strictly the max
> > Unicode character for XML, but since Java represents
> Unicode as utf-16
> > but doesn't really provide much support for surrogate pairs (last I
> > checked), those should work. Hm.. Eclipse tells me that there is
> > Character.MAX_VALUE. Use at your own risk.
>
> I am using it to design the algorithm. Concerned about what to
> do if Unicode requires multiple characters for a single
> character. It's perplexing.
>
> > Reading up on Unicode is also recommended though...
> internationalization
> > is far, far more complicated than you ever imagined. I
> know people who
> > get the shakes if you just mention "Turkish 'I'" in their presence.
> > (mild exaggeration...)
>
> I have no illusions about the complexity. I'd simply hoped that
> they would have made a hard and fast rule about min and
> max values.
>
> Thank you.
>
> --
> Alan Gutierrez - alan@engrm.com
> - http://engrm.com/blogometer/index.html
> - http://engrm.com/blogometer/rss.2.0.xml
>
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