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The Archetype platform is built around the concept of Lenses. Developers can stream data in and out of a lens by attaching one or more data streams to each lens. The Archetype platform uses a unified events protocol to send data in and out of a Lens and to control and query various aspects of the platform. The events protocol is built on a JSON structure, with every event being identified by a type key, paired with a corresponding event_data key.

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Event Types and Event Data

Every event consists of two fields:
  1. type: a string to identify the event type
  2. event_data: a dictonary containing dedicated data for the corresponding type
For example, a developer can query the status of an active lens session using the following event: 
type: session.status
event_data: {}

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Event Types

Common event types are as follows.

Session Events

Session Events allow a developer to query and control the state of an active lens session.

Data Events

Data Events allow a developer to specify and package multimodal sensor data sent in/out of a lens.

Input Stream Events

Input Stream Events allow a developer to connect or disconnect specific input streams to/from a lens.

Output Stream Events

Output Stream Events allow a developer to connect or disconnect specific output streams to/from a lens.