RE: Default and Fixed Attribute declarations

> 
> I did a quick check with XMLSpy 2006. It reports this as a 
> validation error. So as you say, (a) is the answer.


Really, trying out implementations is no way to find out what the spec says.
The answer is in Schema Part 1 section 3.5.4:

For an attribute information item to be.valid. with respect to an attribute
use its .normalized value. must match the canonical lexical representation
of the attribute use's {value constraint} value, if it is present and fixed.

Given <xs:attribute name="foo" type="xs:string" fixed="bar" />, there is an
attribute use with a {value constraint} that is fixed and has the value
"bar". The .normalized value. of the attribute information item is "", which
does not match.

Michael Kay
http://www.saxonica.com/