| 1 Definition | 2 Functional Requirements | 3 Syntax |
| 4 Semantics | 5 Conformance Testing | 6 Performance Assessment |
1 Definition
The start time and the end time of a duration.
2 Functional Requirements
Origin of Time can be Absolute (from 1970/01/01) or relative to a user-selected value.
3 Syntax
https://schemas.mpai.community/OSD/V1.2/data/Time.json
4 Semantics
| Label | Size | Description |
| Header | N1 Bytes | Time Header |
| – Standard-Object | 9 Bytes | The characters “OSD-TIM-V” |
| – Version | N2 Bytes | Major version – 1 or 2 characters |
| – Dot-separator | 1 Byte | The character “.” |
| – Subversion | N3 Bytes | Minor version – 1 or 2 characters |
| MInstanceID | N4 Bytes | Identifier of M-Instance |
| TimeID | N5 Bytes | Identifier of M-Instance. |
| TimeData | 17 Bytes | Data about Time |
| – TimeType | 0 bit | 0=Relative: start at 0000/00/00T00:00 1=Absolute: start at 1970/01/01T00:00. |
| – TimeUnit | 1-5 | reserved |
| – Reserved | 6-7 bits | 00=seconds, 01=milliseconds, 10=microseconds, 11=nanoseconds. |
| – StartTime | 8 Bytes | Start of Time. |
| – EndTime | 8 Bytes | End of Time. |
| DescrMetadata | N6 Bytes | Descriptive Metadata |
5 Conformance Testing
A Data instance Conforms with MPAI-OSD V1.2 (OSD-) if:
- The Data validates against the Times’s JSON Schema.
- All Data in the Times’s JSON Schema have the specified type.
6 Performance Assessment
