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| Latest version | 2.1 |
|---|---|
| DFSG compatible | Yes |
| FSF approved | Yes[1] |
| OSI approved | Yes |
| GPL compatible | 1.0 No,[2] 2.x Yes[1] |
| Copyleft | No[1] |
Zope Public License is a free software license, used primarily for the Zope application server software. The license is similar to the well-known BSD license, however the ZPL also adds clauses prohibiting trademark use and requiring documentation of all changes.