World model
A learned representation of how an environment changes over time. It can predict future observations or latent states and support planning through simulated rollouts.
Technical glossary
Use the same words for the same data
Concise definitions for the model, collection, labeling, release, and evaluation concepts behind action trajectories.
01
00.000sObserve
rgb.player_view02
00.050sAct
move.forward + camera.delta03
00.100sTransition
pose.x +0.84 m04
00.150sOutcome
progress 0.31 → 0.36The values are synthetic and illustrate the public specification. They are not measurements from a commercial dataset.
Action-conditioned world model
A world model that predicts future state or observations using an action, action sequence, or policy command as an explicit condition.
World action model
An emerging term for a model that jointly represents environment dynamics and action, often predicting or generating visual futures together with control sequences.
Trajectory
An ordered sequence of observations, actions, states, and optional rewards or outcomes belonging to one agent or episode.
Episode
A bounded attempt or interaction sequence with a defined beginning, context, and terminal condition.
Observation
Information available to an agent or model at a point in time, such as pixels, audio, depth, language, or sensor measurements.
Action
A control input or decision intended to influence the environment, recorded at a defined semantic level and time.
State
A representation of environment variables sufficient for a task or transition model, which may be measured, privileged, estimated, or latent.
Transition
A change from one state or observation to another, often represented as current context, action, next state, and outcome.
Rollout
A sequence generated by interacting with an environment or by repeatedly applying a model to imagine future states under actions.
Telemetry
Structured measurements emitted by a game, simulator, robot, or capture system, including state variables, events, timing, and system status.
Timebase
The clock and timestamp convention used to align streams within an episode or dataset.
Dataset provenance
The traceable history of where data came from, who collected or transformed it, which tools were used, and how a released file relates to its source.
Outcome
A result associated with a transition or episode, such as progress, reward, success, failure, event occurrence, or terminal condition.