Version

Version contains structured information about the version of a package.

JSON representation 
{
  "epoch": integer,
  "name": string,
  "revision": string,
  "kind": enum (VersionKind)
}
Fields
epoch

integer

Used to correct mistakes in the version numbering scheme.
name

string

Required only when version kind is NORMAL. The main part of the version name.
revision

string

The iteration of the package build from the above version.
kind

enum (VersionKind)

Required. Distinguishes between sentinel MIN/MAX versions and normal versions.

VersionKind

Whether this is an ordinary package version or a sentinel MIN/MAX version.

Enums
VERSION_KIND_UNSPECIFIED Unknown.
NORMAL A standard package version.
MINIMUM A special version representing negative infinity.
MAXIMUM A special version representing positive infinity.