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

1 Definition

A Data Type including a collection of Basic 3D Model Objects.

A 3D Model Object can have a hierarchical structure where 3D Model Objects contain Basic 3D Model Objects and 3D Model Objects.

2 Functional Requirements

A 3D Model Object may include:

  1. ID of a Virtual Space (M-Instance) where it is or intended to be located.
  2. ID of the 3D Model Object.
  3. Space-Time information of the 3D Model Object.
  4. Basic 3D Model Objects and other 3D Model Objects included in the 3D Model Objects.
  5. Annotation data set including:
    1. Annotations
    2. Space-Times of the Annotations.
    3. Rights to perform Actions on the 3D Model Object Annotation.
  6. The Rights that may be exercised on the 3D Model Object.

Note that.

  1. A 3D Model Object that does not include 3D Model Objects and only one Basic 3D Model Object is a Basic 3D Model Object.
  2. The Space-Time information of a Basic 3D Model Object and a 3D Model Object included in an 3D Model Object may be superseded by the Space-Time information of the 3D Model Object containing them.

3 Syntax

https://schemas.mpai.community/OSD/V1.4/data/3DModelObject.json

4 Semantics

Label Description
Header 3D Model Object Header
– Standard-3DModelObject The characters “OSD-3DO-V”
– Version Major version – 1 or 2 characters
– Dot-separator The character “.”
– Subversion Minor version – 1 or 2 characters
MInstanceID Identifier of M-Instance.
3DModelObjectID Identifier of the 3D Model Object.
3DModelObjectSpaceTime Space-Time of 3D Model Object.
Basic3DModelObjectCount Set of Parent 3D Model Objects.
Basic3DModelObjects[] Set of Basic 3D Model Objects.
– SpaceTime Space Time of a Basic 3D Model Object in the 3D Model Object.
– Basic3DModelObject A Basic 3D Model Object in the 3D Model Object.
3DModelObjectCount Number of 3D Model Objects.
3DModelObjects[] Set of 3D Model Objects.
– SpaceTime Space Time of an 3D Model Object in the 3D Model Object.
– 3DModelObject A 3D Model Object in the 3D Model Object
Annotations[] Set of 3D Model Object Annotation.
– Annotation An Annotation.
– AnnotationSpaceTime Where Annotation is attached and when it will be active.
– Rights Process Actions that may be performed on the Annotation
Rights Process Actions that may be performed on the Object.
DescrMetadata Descriptive Metadata

5 Conformance Testing

A Data instance Conforms with 3D Model Object (OSD-3DO) if:

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

6 Performance Assessment