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RCS file: /cvsrepo/anoncvs/cvs/www/policy.html,v
retrieving revision 1.40
retrieving revision 1.41
diff -u -r1.40 -r1.41
--- www/policy.html	2017/03/25 18:03:36	1.40
+++ www/policy.html	2017/03/27 14:52:42	1.41
@@ -277,6 +277,26 @@
 The original Apache license was similar to the Berkeley license,
 but source code published under version 2 of the Apache license is
 subject to additional restrictions and cannot be included into OpenBSD.
+In particular, if you use code under the Apache 2 license, some of
+your rights will terminate if you claim in court that the code
+violates a patent.
+<p>
+
+A license can only be considered fully permissive if it allows use
+by anyone for all the future without giving up any of their rights.
+If there are conditions that might terminate any rights in the
+future, or if you have to give up a right that you would otherwise
+have, even if exercising that right could reasonably be regarded
+as morally objectionable, the code is not free.
+<p>
+
+In addition, the clause about the patent license is problematic because
+a patent license cannot be granted under Copyright law, but only under
+contract law, which drags the whole license into the domain of contract
+law.  But while Copyright law is somewhat standardized by international
+agreements, contract law differs wildly among jurisdictions.  So what
+the license means in different jurisdictions may vary and is hard to
+predict.
 <p>
 
 <dt>ISC<dd><p>