Boundary Type (Core Services)
Defines the behavior of data retrieval at the end points of a specified time range. The following values are accepted:
Specifies to return the recorded values on the inside of the requested time range as the first and last values. When used as the boundary type for a sync time, all returned values are guaranteed to be within the specified time range.
Specifies to return the recorded values on the outside of the requested time range as the first and last values. When used as the boundary type for a sync time, the returned values can be outside the specified time range by no more than one interval. For more details, see the Sync Time help topic.
Specifies to create an interpolated value at the end points of the requested time range if a recorded value does not exist at that time. This boundary type is not supported for sync times.