sorting text-number strings?

I want to sort values of the form:
"title 1, title2, some other name, title 3, ..., title 9, title 10, title 11"
which include both alpha and numeric characters. I would like the sort to
treat alpha characters alphabetically and numeric characters numerically.

<xsl:sort select="." data-type="text"> gives results:
.., title1, title 10, title 11, title 2, title 3..., 

<xsl:sort data-type="number"> gives results that aren't alphabetized.

Is there a way to achieve a sort with results?:
title 1, title2, title 3,..., title 9, title 10, title 11

I must be missing something.
Thanks,



Bill Parod
Information Technology
Northwestern University, Evanston, IL.  USA
bill-parod@xxxxxxx
http://charlotte.acns.nwu.edu/parod/


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list