| 1 Definition | 2 Functional Requirements | 3 Syntax |
| 4 Semantics | 5 Conformance Testing | 6 Performance Assessment |
1 Definition
A Data Type including the Objects of a scene, their sub-scenes, and their arrangement in the scene.
2 Functional Requirements
Scene Descriptors include
- Objects
- The Descriptors of the Scenes includes in the Scene called Sub-Scenes.
- Rights that may be exercised on the Scene.
Scenes may be hierarchical, i.e., they may contain Objects and Scenes.
| Scene Descriptors name | Acronym | JSON |
| 3DModel Scene Descriptors | OSD-3SD | Link |
| Audio Scene Descriptors | OSD-ASD | Link |
| Audio-Visual Scene Descriptors | OSD-MSD | Link |
| LiDAR Scene Descriptors | OSD-LSD | Link |
| Offline Map Scene Descriptors | OSD-OSD | Link |
| RADAR Scene Descriptors | OSD-RSD | Link |
| Speech Scene Descriptors | OSD-SSD | Link |
| Ultrasound Scene Descriptors | OSD-USD | Link |
| Visual Basic Descriptors | OSD-VSD | Link |
3 Syntax
https://schemas.mpai.community/OSD/V1.4/data/SceneDescriptors.json
4 Semantics
| Label | Description |
| Header | Scene Descriptors Header |
| – Standard-SceneDescriptors | The characters “OSD-SCD-V” |
| – Version | Major version – 1 or 2 characters |
| – Dot-separator | The character “.” |
| – Subversion | Minor version – 1 or 2 characters |
| MInstanceID | Identifier of M-Instance. |
| SceneDescriptorsID | Identifier of Scene Descriptors. |
| SceneDescriptorsSpaceTime | Space and Time of Scene Descriptors. |
| ObjectCount | Number of Objects in Scene. |
| Objects[] | Set of Objects. |
| – Object or ObjectID | Object in the Scene of its ID. |
| – ObjectSpaceTime | Space Time of Object. |
| SubSceneCount | Number of Sub-Scenes in Scene. |
| SubScenes[] | Set of Sub-Scenes in the Scene. |
| – SubScene or SubSceneID | Sub-Scene in the Scene or its ID. |
| – SubSceneSpaceTime | Space Time of Sub-Scene. |
| DescrMetadata | Descriptive Metadata |
5 Conformance Testing
A Data instance Conforms with Scene Descriptors (OSD-SCD) if:
- The Data validates against the Scene Descriptors’ JSON Schema.
- All Data in the Scene Descriptors’ JSON Schema
- Have the specified type
- Validate against their JSON Schemas
- Conform with their Data Qualifiers.