"Derivative Work" for Software Defined

[Brian Behlendorf]

(Scott, quote the GPL:)
>    "Thus, it is not the intent of this section to claim rights or contest
> your rights to work written entirely by you; rather, the intent is to
> exercise the right to control the distribution of derivative or collective
> works based on the Program."

Can someone clear up the difference between "mere aggregation" and a
"collective work"?  Is Red Hat Linux a "collective work" or a "mere
aggregation" of many different software packages, some of them GPL,
some under other open source licenses, some of them not?

	Brian

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