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

1. Definition

Descriptors that are based on Participant data form the Virtual Environment (objects and avatars) and have a form that is suitable for interpretation (e.g., Face and Gestures) in addition to providing Descriptors to determine cue points.

2. Functional Requirements

Participant descriptors from the virtual environment via the metaverse API per individual participant avatar.

  1. Avatar attributes
  2. Avatar behaviour Descriptors
    1. Spatial Attitude
    2. Limb, head motion
    3. Eye gaze direction
  3. Avatar controls
  4. 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 RE Participant Descriptors Header
– Standard-VEParticipantDescriptors The characters “XRV-VTD-V”
– Version Major version – 1 or 2 characters
– Dot-separator The character “.”
– Subversion Minor version – 1 or 2 characters
MInstanceID ID of the Metaverse
VEParticipantDescriptorsTime Space-Time info of VE Participant Descriptors
VEParticipantDescriptions[] Collection of VE Participant Descriptors.
– AvatarID ID of one Avatar
– AvatarSpatialAttitude Avatar’s Spatial Attitude
– Avatar Avatar’s snapshot including Nodel and Face and Body Descriptors.
– AvatarData Avatar’s attributes obtained from Metaverse API
– AvatarControls Set of Avatar Control Data obtained from Metaverse API
– BiometricData Avatar’s Biometric Data obtained from Metaverse API
DescrMetadata Descriptive Metadata