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/V1.5/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. Its JSON Object validates against its JSON Schema.
  2. Any included  JSON Object validates against its JSON Schema.
  3. All Data in the JSON Object:
    1. Have the specified Data Types.
    2. Conform with the Qualifiers signaled in their JSON Schemas.

6     Performance Assessment