A compilation of a covered work with other separate and independent
works, which are not by their nature extensions of the covered work,
in or on a volume of a storage or distribution medium, is called an
"aggregate" if the copyright resulting from the compilation is not
used to limit the legal rights of the compilation's users beyond what
the individual works permit. Mere inclusion of a covered work in an
aggregate does not cause this License to apply to the other parts of
the aggregate.