structured data stored in a history collection where parts of the structure are used to uniquely identify the data within the data collection
Note 1 to entry: Most historical data applications assume only one current value per timestamp. Therefore the timestamp of the data is considered the unique identifier for that value. Some data or meta data such as Annotations may permit multiple values to exist at a single timestamp. In such cases the Server would use one or more parameters of the Structured History Data entry to uniquely identifiy each element within the history collection. Annotations are examples of Structured History Data.