Entity
nsdef:entityentity — a STABLE telemetry subject tracked by a feed (an event, a quake, a satellite); entity:<feed>:<extid> is content-addressed by (feed, external id) so its identity never changes as its observations stream in.
entity — a STABLE telemetry subject tracked by a feed (an event, a quake, a satellite); entity:<feed>:<extid> is content-addressed by (feed, external id) so its identity never changes as its observations stream in.