Question on character classes

Greetings!

Whirring away on untangling the portability portions but curious about 
the use of XML character classes.

Makes sense if we are talking about XML text, makes less sense if we are 
talking about strings in general. Just use Unicode character classes 
with the correct references.

Was there some overt reason for choosing XML character classes?

Thanks!

Hope everyone is having a great weekend!

Patrick

-- 
Patrick Durusau

Chair, V1 - US TAG to JTC 1/SC 34
Convener, JTC 1/SC 34/WG 3 (Topic Maps)
Editor, OpenDocument Format TC (OASIS), Project Editor ISO/IEC 26300
Co-Editor, ISO/IEC 13250-1, 13250-5 (Topic Maps)