Thank you Mike..
Regards,
Mukul
--- Michael Kay <mhk(_at_)mhk(_dot_)me(_dot_)uk> wrote:
*It would be interesting to know how Saxon
implements
this behaviour..* if M. Kay will be kind to
answer..
I thought you would never ask. I'm an optimist ;-)
The answer is different for Saxon 6.x and Saxon 7.x.
In Saxon 6.x, you can write your own collating
functions as a plug-in,
but if you don't, then two strings are compared as
follows:
1. The two strings are compared with case
normalized and accents
stripped, using Unicode codepoint order of the
normalized characters.
2. If step (1) finds that the strings are equal,
they are compared
with case normalized but without accents stripped,
again using codepoint
order.
3. If step (2) finds that the strings are equal,
the outcome depends
on the case of the first character that differs in
the two strings,
taking account of the case-order option on xsl:sort.
Case normalization relies on the Java method
toLowerCase. Accent
stripping is implemented only for characters in the
upper half of the
Latin-1 set.
The above is essentially a simplified implementation
of the Unicode
Collation Algorithm.
In Saxon 7.x, Saxon uses the collation capabilities
of JDK 1.4. You can
select any collation supported by the JDK. The
default is selected
according to your locale, or according to the
language if lang is
specified on xsl:sort. If case-order is upper-first,
then the action of
the selected Java collation is modified as follows:
if the Java
collation decides that two strings collate as equal,
then Saxon examines
the two strings, looking for the first character
that differs between
the two strings. If one of these is upper case, then
that string comes
first in the sorted order.
Michael Kay
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