View source for Versioning

https://en.wikipedia.org/wiki/Software_versioning
https://en.wikipedia.org/wiki/Release_management
((http://semver.org/ Semantic Versioning))


A.B.C

6.0.0
  * 6.0.4
6.2.0
  * 6.2.20

A. major release
B. minor release
C. maintenance release