suggestion: optional clauses for open source licenses

[Bernhard Fastenrath]

OSI could provide some building blocks to allow licenses to be
shaped according to the requirements of software authors.

Example:

I want to include the paragraph 5 of the STWL with the GPL:

   "If you are owner of software patents you agree to refrain from
any legal action based on infringement of your intellectual property 
claims derived from said patents against users of open source software 
and concerning open source software as defined by the Open Source 
Initiative (OSI)."

In that case it might be nice to have a table which clauses can
be added to which licenses and still result in valid OSI licensing
terms. The license name could be written as GPL+PIP which would
mean "GNU Public License with additional Public Intellectual Property 
clause"

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