Abstract: In response to receiving a request for an identity key from a first entity, an identity key for the first entity is generated. A first request from the first entity to replicate a set of data is received. The generated identity key for the first entity is added to the metadata of the set of data requested to be replicated. A determination is made whether a replication rule exists for the first entity. In response to determining that a replication rule exists for the first entity, the set of data is replicated according to the replication rule for the first entity.

Abstract: A blade holder has cutting edges for cutting a frustoconical tip to sharpen a crayon and also for cutting a sleeve wrapping the crayon. Outlet apertures in the blade holder allow the swarf to escape during sharpening. A serrated knife is mounted to the blade holder for circumferentially scoring the sleeve, weakening the cut strip of sleeve or breaking it up to avoid clogging of the outlet apertures. The blade holder includes a coupling by which it may be connected without tools to a mating motor-driven coupling, while ensuring proper axial alignment. A female coupling has an aperture extending between first and second mouth portions in a transverse side and longitudinal end of the first coupling respectively, and joined by a slotted mouth portion. The mating male coupling has a neck terminating in a head at an axial end of the neck. The neck being sized to pass through the slotted mouth portion, and the head being sized to pass transversely through the first mouth portion.