Time Limit Functionality

[Anderson, Kelly]

I know that one of the premises of open source is that you are allowed
to do pretty much anything with the code you want to in terms of fields
of endeavor. However, I'm wondering if there would be a way to craft a
license that would simultaneously be open source, but would prevent
others from implementing a specific feature for a time.

For example, suppose you wanted to release an email program as open
source, but you wanted to prevent (say for two years) anyone from
implementing a mass mailer using that source code.

I know this gets pretty close to item 6. No Discrimination Against
Fields of Endeavor, but I'm not sure it's exactly the same.

Comments?

-Kelly





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