Archive, sampling contract and types¶
The store that reads archives, the window a read returns, and the metadata and sampling contract types an archive carries.
| Name | Summary |
|---|---|
tsdive.TagStore |
Read-only view over root/<source_id>/<point_id>.parquet files. |
tsdive.SingleFileStore |
Read-only view over one explicit parquet file (no layout assumptions). |
tsdive.Window |
One tag's samples from start to end and the data physics of the read. |
tsdive.Source |
A read-only window provider over process time series. |
tsdive.TagMeta |
Static metadata for one tag. |
tsdive.TagIdentity |
Immutable archive coordinates of a tag. |
tsdive.Role |
Control-loop role of a tag. Nullable on TagMeta; populated when known. |
tsdive.EngRange |
Engineering range as zero/span (the historian's own representation). |
tsdive.SamplingContract |
Declares how a window's samples were produced. |
tsdive.AggregateType |
OPC UA Part 13 aggregate flavour, when the source is an aggregate. |
tsdive.CalculationBasis |
PI AF CalculationBasis values relevant to a window read. |
tsdive.RetrievalMode |
How raw samples were retrieved from the archive. |