VMware Versioning Policy
VMware uses two different product version schemes: 1) has three numbers in the format x.y.z,; 2) has two numbers in the format and may include an Update number x.y Un.
The number in the “x” position identifies a major release. The number in the “y” position identifies a minor release. The "z" position indicates a minor revision for maintenance releases. The “n” position indicates the update number.