See the error message it produces.
> cos-all-limited.1.2: An ''all'' model group must appear in a particle
> with '{'min occurs'}'='{'max occurs'}'=1, and that particle must be part
> of a pair which constitutes the '{'content type'}' of a complex type
> definition.
Search the XML Schema spec for "cos-all-limited" and you'll find the
relevant part of the spec.
regards,
--
Kohsuke KAWAGUCHI 408-276-7063 (x17063)
Sun Microsystems kohsuke.kawaguchi_at_sun.com