<s>
Zope	B-Language
Public	I-Language
License	I-Language
is	O
a	O
free	B-License
software	I-License
license	I-License
,	O
used	O
primarily	O
for	O
the	O
Zope	B-Language
application	O
server	O
software	O
.	O
</s>
<s>
The	O
license	O
is	O
similar	O
to	O
the	O
well-known	O
BSD	B-Operating_System
license	I-Operating_System
,	O
however	O
the	O
ZPL	O
also	O
adds	O
clauses	O
prohibiting	O
trademark	O
use	O
and	O
requiring	O
documentation	O
of	O
all	O
changes	O
.	O
</s>
