- import yang-ext {prefix ext;}
- import ietf-inet-types {prefix inet;}
- import ietf-yang-types {prefix yang;}
+ import yang-ext {prefix ext; revision-date "2013-07-09";}
+ import ietf-inet-types {prefix inet; revision-date "2010-09-24";}
+ import ietf-yang-types {prefix yang; revision-date "2010-09-24";}