3 Terms, definitions, and abbreviations

3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in OPC 10000-1, OPC 10000-3, OPC 10000-4, OPC 10000-13 and the following apply.

3.1.1 Annotation

metadata associated with an item at a given instance in time

3.1.2 BoundingValues

values associated with the starting and ending time

3.1.3 Historian

application storing time series data and/or time series events

3.1.4 HistoricalNode

Object, Variable, Property or View in the AddressSpace where a Client can access historical data or Events

3.1.5 HistoricalDataNode

Variable or Property in the AddressSpace where a Client can access historical data

3.1.6 HistoricalEventNode

Object or View in the AddressSpace for which a Client can access historical Events

3.1.7 ModifiedValues

HistoricalDataNode ’ s value that has been changed (or manually inserted or deleted) after it was stored in the historian

3.1.8 RawData

data that is stored within the historian for a HistoricalDataNode

3.1.9 StartTime/EndTime

bounds of a history request which define the time domain

3.1.10 TimeDomain

interval of time covered by a particular request, or response

3.1.11 StructuredHistoryData

structured data stored in a history collection where parts of the structure are used to uniquely identify the data within the data collection

3.2 Abbreviated terms