Re: referencing a schema fails

Thanks, Alain.  

I guess I didn't properly understand the function of the preceding
attribute, defining a namespace.  Now, maybe it's the validator I'm using;
I'm simply opening my document in Peter's xml editor 2.0.  However, once I
edit out "noNamespace," I get a different error message for line 0.  Now it
tells me that I've an unrecognized attribute, consisting of 

{http://www.w3.org/2001/XMLSchema-instance}SchemaLocation

It's as if it were ignoring the intervening closed quote, space, attribute
name xsi:SchemaLocation, equal sign, and open quote.  I hear it's an
excellent program, so I've a feeling it's an error I'm making.  

Thanks for the advice! 
John