Go to XRV-LTP Data Types

1. Definition 2. Functional Requirements 3. Syntax 4. Semantics

1. Definition

Descriptors that are based on VE Data In from avatars, objects and controllers in the Virtual Environment and have a form that is suitable for Interpretation (e.g., Position and Orientation, Avatar Face and Gestures, Controller Data).

2. Functional Requirements

Participant descriptors from the Virtual Environment imclude per individual participant avatar.

  1. Audio-Visual Scene Descriptors
  2. Seat Arrangement
  3. Avatar Descriptors
    1. Spatial Attitude
    2. Limb, head motion
    3. Eye gaze direction
    4. Avatar attributes
  4. Avatar controls
    1. Voting
    2. Controller
      1. Spatial Attitude
      2. Actuator data
      3. Text
  5. Biometric descriptors of the participant represented in the Virtual Environment.
    1. Heart rate and Heart rate variability (HRV).
    2. Brain state from EEG data (delta, theta, alpha, beta, gamma).
    3. Galvanic Skin Response (Electrodermal Activity).
    4. Myoelectric intensity per electrode site.
    5. Skin temperature.

3. Syntax

https://schemas.mpai.community/XRV1/V1.0/data/VEParticipantDescriptors.json

4. Semantics

Label Description
Header VE Participant Descriptors Header. Shall have constant value “XRV-VTD-V1.0”.
MInstanceID ID of the Metaverse
UEnvironmentID Identifier of the U-Environment (Real Space) associated with this VE Participant Descriptors instance.
VEParticipantDescriptorsID Identifier of VE Participant Descriptors.
VEParticipantDescriptorsTime Space-Time info of VE Participant Descriptors
AVSceneDescriptors Audio Visual Scene Descriptors as defined in OSD V1.5.
SeatOccupation Seat Occupation as defined in XRV1 V1.0.
VEParticipantDescriptorsData[] Collection of VE Participant Descriptors.
– VEParticipantID Identifier of VE Participant.
– SeatID Identifier of Seat.
– SpatialAttitude Spatial Attitude as defined in OSD V1.5.
– BiometricData Avatar’s Biometric Data obtained from Metaverse API
– Brainwaves Frequency, in Hz, of each EEG band, per Brainwaves (AIH-BRW).
– ControlObject Control Object as defined in XRV1 V1.0.
– AvatarOrAvatarID[] Array of Portable Avatars (objects) or Portable Avatar IDs (string).
DataXMData MPAI-PTF Data Exchange Metadata providing provenance, authorisation, legal, security, and confidence information associated with this VE Participant Descriptors instance in a trusted data exchange context.
DescrMetadata Descriptive Metadata

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