Adding blurb about change with default staleness semantics
git-svn-id: svn+ssh://dyadis.cs.arizona.edu/NDN-spec/spec-sphinx@206 c5937c81-b952-4fd9-96ba-3036b240b622
diff --git a/interest.rst b/interest.rst
index 025ee13..7ebd49e 100644
--- a/interest.rst
+++ b/interest.rst
@@ -194,3 +194,10 @@
- ``InterestLifetime`` changes the unit to the number of milliseconds.
- Removed Bloom Filter from Exclude.
+
+- Changed default semantics of staleness.
+
+ Specifically, NDN-TLV Interest without any selectors will bring any data that matches the name, and only when ``MustBeFresh`` selector is enabled it will try to honor freshness, specified in Data packets.
+ With Binary XML encoded Interests, the default behavior was to bring "fresh" data and return "stale" data only when ``AnswerOriginKind`` was set to 3.
+
+ Application developers must be aware of this change, reexamine the Interest expression code, and enable ``MustBeFresh`` selector when necessary.