key_version/2—retrieve the version from a license  key

The syntax for key_version/2 is as follows:

key_version/2 arguments 

Use the key_version/2 to retrieve the version number from license key $KEY and return it in $VERSION.

A license key is a string containing licensing information, as provided by BMC.

An application that requires a license key can support multiple versions of the license key. Each version can have different restrictions or result in a different behavior. With this primitive, the application can retrieve the version of a key and behave according to the returned version.

key_version/2 example