1     Definition 2     Functional Requirements 3     Syntax
4     Semantics 5    Conformance Testing 6     Performance Assessment

1    Definition

A Data Type including:

  1. Visual Data perceptible by a visual device or visible to a human when rendered.
  2. Descriptive Data regarding Sub-Types, Formats and Attributes of the Visual Data (optionally).

In the following, Data, Qualifier, and Object should be read as Visual Data, Visual Qualifiers, and Visual Object, respectively.

2     Functional Requirements

A Basic Object may include:

  1. The ID of a Virtual Space (M-Instance) where it is or is intended to be located.
  2. The ID of the Basic Object.
  3. The ID(s) of Objects at a preceding time (Parent Objects) supporting two cases:
    1. The Parent Object has spawned two (or more) Objects.
    2. Two (or more) Parent Objects have merged into one.
  4. The Space-Time information of Parent Objects in an M-Instance.
  5. The ID(s) of Objects at a following time (Child Objects).
  6. The Space-Time information of Child Objects in an M-Instance.
  7. The Space-Time information of the Basic Object in an M-Instance.
  8. The Qualifier of the Visual Data.
  9. Additional Basic Visual Object information.
    – Mass of the Object
    – Material Property – is material or immaterial
    – Gravity Property – is subject to gravity or not
    – Texture Map – the Objects texture map
    – Object Audio Characteristics – the audio characteristics of the Object.
  10. The set of Annotations including, for each Annotation:
    1. Space-Time information of the Annotation.
    2. Rights to perform Actions on the Annotation.
  11. The Rights that can be exercised on the Basic Object.

3     Syntax

https://schemas.mpai.community/OSD/V1.4/data/BasicVisualObject.json

4     Semantics

Label Description
Header Visual Object Header
– Standard-VisualObject The characters “OSD-BVO-V”
– Version Major version – 1 or 2 characters
– Dot-separator The character “.”
– Subversion Minor version – 1 or 2 characters
MInstanceID Identifier of M-Instance.
VisualObjectID Identifier of the Visual Object.
ParentVisualObjects[] Identifier(s) of Parent Visual Objects.
– ParentVisualObjectID Identifier of a Parent Visual Object.
– ParentVisualDataSpaceTime SpaceTime of a Parent Visual Object.
ChildVisualObjects[] Identifier(s) of Parent Visual Objects.
– ChildVisualObjectID Identifier of a Child Visual Object.
– ChildVisualDataSpaceTime SpaceTime of a Child Visual Object.
BasicObjectSpace-Time Space-Time info of Visual Data.
BasicVisualObjectData Data of Basic Object.
VisualDataQualifier Qualifier of Visual Data.
BasicVisualObjectProperties Additional information on Object
– Mass Mass of the Object
– MaterialProperty Object has material consistence (0=No, 1=Yes)
– GravityProperty Object is subject to gravity (0=No, 1-Yes)
– TextureMap Texture Map
– ObjectAudioCharacteristics Basic Visual Object’s Audio Characteristics
– EulerAngles The three axes of the Basic 3D Model Object with respect to the coordinate system.
BasicVisualObjectsAnnotations[] Annotations of Visual Data
– Annotation ID of Annotation
– AnnotationSpaceTime Where/when Annotation is attached.
– RightsID What is possible to do with the Annotation
BasicVisualObjectRights Rights to Act on the Basic Visual Object.
DescrMetadata Descriptive Metadata

5     Conformance Testing

A Data instance Conforms with Basic Object if:

  1. The Data validates against the Basic Object’s JSON Schema.
  2. All Data in the Basic Object’s JSON Schema
    1. Have the specified type
    2. Validate against their JSON Schemas
    3. Conform with their Data Qualifiers, if present.

6     Performance Assessment