Variant

enum Ramsey\Uuid\Variant int

The variant number describes the layout of the UUID. UUIDs generated according to the layout defined in RFC 4122 will always have a variant value set to 2. In ramsey/uuid, this is the enum value Ramsey\Uuid\Variant::Rfc4122.

case ReservedNcs 0

Reserved for NCS backward compatibility.

case Rfc4122 2

The RFC 4122 variant.

case ReservedMicrosoft 6

Reserved for Microsoft Corporation backward compatibility.

case ReservedFuture 7

Reserved for future definition.