Section 2.3 of the Primer, paragraph 3 states:

"Suppose we wish to create a new type of integer called myInteger whose range 
of values is between 10000 and 99999 (inclusive). We base our definition on the 
built-in simple type integer, whose range of values also includes integers less 
than 10000 and greater than 99999."

The second sentence should read:

"We base our definition on the built-in simple type integer, whose range of 
values also includes integers greater than or equal to 10000 and less than or 
equal to 99999."

See
http://lists.w3.org/Archives/Public/www-xml-schema-comments/2001JulSep/0108.html