Definition
Functional Requirements
Syntax
Semantics
Conformance
Performance
1 Definition
Data sent by a specific Environment Sensing Technology Scene Description AIM to the AMS’s Traffic Obstacle Avoidance AIM because it is considered to hold information to be processed urgently, hence before the full Basic Scene Descriptors Data is computed.
2 Functional Requirements
An Alert includes specific objects that are deemed to require consideration. For example, a Scene Description AIM may immediately send a suddenly unobscured traffic sign to the Traffic Obstacle Avoidance AIM for consideration.
The EST Scene Description AIM may attach an Annotation to the Object that includes the semantics of the traffic sign Object. It may also add 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 V2.0 provides the sign semantics.
3 Syntax
https://schemas.mpai.community/CAV2/V2.0/data/Alert.json
4 Semantics
Table 1 specifies the semantics of the Alert Data Type.
| Label | Type | Req. | Description |
|---|---|---|---|
| Header | string (CAV-ALT-V2.0) | Yes | Alert Header – Standard CAV-ALT-Vx.y |
| MInstanceID | string | Identifier of the M-Instance (Virtual Space) associated with this Alert. | |
| UEnvironmentID | string | Identifier of the U-Environment (Real Space) associated with this Alert. | |
| AlertID | string | Yes | Unique identifier of this Alert. |
| AlertTime | Simple Time | Time this Alert was produced. | |
| AlertData | object [] | Yes | Set of Objects deemed to require urgent consideration by the Traffic Obstacle Avoidance AIM. |
| DataXMData | Data Exchange Metadata | MPAI-PTF Data Exchange Metadata providing provenance, authorisation, legal, security, and confidence information associated with this Alert in a trusted data exchange context. | |
| DescrMetadata | string | Human-readable descriptive metadata of the Alert (plain text, max 2048 characters). |
5 Conformance Testing
Data conform to the Alert Data Type when they validate against its schema. If the schema references other schemas, data referencing a secondary schema shall also validate against that schema, if present, and conform with the Qualifier, if present.
