1 Definition
Data sent by a Scene Description AIM for a specific Environment Sensing Technology to the Traffic Obstacle Avoider as soon as available to provide information considered urgent, hence before the Basic Scene Descriptors are computed.
2 Functional Requirements
An Alert includes relevant Objects. For example, a Scene Description AIM may immediately send a traffic sign that is suddenly unobscured or a dangerous object to the Obstacle Avoider for consideration.
An Annotation may be attached to the Object that includes the semantics of the traffic sign Object and other numerical or textual information extracted from the Object. An example of Annotation is an element of the Vienna Convention on Road Signs and Signals for which CAV-TEC V1.0 provides a digitised version of the sign semantics.
3 Syntax
https://schemas.mpai.community/CAV2/V1.0/data/Alert.json
4 Semantics
| Label | Size | Description |
| Header | N1 Bytes | Road State Header |
| – Standard | 9 Bytes | The characters “CAV-ALT-V” |
| – Version | N2 Bytes | Major version – 1 or 2 Bytes |
| – Dot-separator | 1 Byte | The character “.” |
| – Subversion | N3 Bytes | Minor version – 1 or 2 Bytes |
| Objects[] | N4 Bytes | Set of relevant Objects. |
| – Object | N5 Bytes | An Object of the set. |
| DescrMetadata | N6 Bytes | Descriptive Metadata |
