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@@ -2,7 +2,12 @@
 oslo.versionedobjects
 ===================================
 
-oslo.versionedobjects library
+oslo.versionedobjects library deals with DB schema being at different versions
+than the code expects, allowing services to be operated safely during upgrades.
+It enables DB independent schema by providing an abstraction layer, which
+allows us to support SQL and NoSQL Databases. oslo.versionedobjects is also
+used in RPC APIs, to ensure upgrades happen without spreading version dependent
+code across different services and projects.
 
 * Free software: Apache license
 * Documentation: http://docs.openstack.org/developer/oslo.versionedobjects