[Fwd: [Moderator Action] Re: 2.3 Simple Types]

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Hi,

As someone trying to learn XML & XML Schema from the specifications I have
the following minor observation. I'd like to add that the XML Schema Primer
is generally very accessible and a valuable text.

The paragraph about pattern facet (below) refers to ASCII characters, I find
this confusing as other XML definitions are always given in term of
Unicode - I understand that ASCII is a possible supported encoding of the
XML Unicode characters (but not manditory for all parsers - only UTF-8 &
UTF-16 are manditory?). I therefore think it would be more appropriate to
change the reference to Unicode.

'The purchase order schema contains another, more elaborate, example of a
simple type definition. A new simple type called SKU is derived (by
restriction) from the simple type string. Furthermore, we constrain the
values of SKU using a facet called pattern in conjunction with the regular
expression "\d{3}-[A-Z]{2}" that is read "three digits followed by a hyphen
followed by two upper-case ASCII letters":'

Your thoughts on this matter would be appreciated.

Regards,

Mark