- import ietf-inet-types {prefix inet;}
- import ietf-yang-types {prefix yang;}
- import opendaylight-flow-types {prefix flow-types;}
+ import ietf-inet-types {prefix inet; revision-date "2010-09-24";}
+ import ietf-yang-types {prefix yang; revision-date "2010-09-24";}
+ import opendaylight-flow-types {prefix flow-types;revision-date 2013-10-26";}