Annotation – OPC Unified Architecture – Part 11: Historical Access

OPC Unified Architecture – Part 11: Historical Access

v1.05.04

1Scope
2Normative references
3Terms, definitions, and abbreviations
- 3.1Terms and definitions
- 3.2Abbreviated terms
4Concepts
5Historical Information Model
6Historical Access specific usage of Services
Annex AClient conventions (Informative)
- A.1How clients can request timestamps
- A.2Determining the first or last historical data point

3.1.1 Annotation

metadata associated with an item at a given instance in time

Note 1

Note 1 to entry: An Annotation is metadata that is associated with an item at a given instance in time.