TagRef
- Last UpdatedMar 10, 2025
- 1 minute read
Contains one row for each tag in the system. This table is used as a reference table for the Tag table, so that the TagName column is not propagated as the primary key of child tables.
|
Column |
Data Type |
Description |
|---|---|---|
|
(PK) wwDomainTagKey |
int NOT NULL |
The unique numerical identifier for a tag in a specific domain. This value is automatically generated by the system when the tag is added. |
|
wwTagKey |
int NOT NULL |
The unique numerical identifier of a tag within a single AVEVA Historian. wwTagKey is populated from the Tag table, but is not a foreign key. |
|
(FK) ServerKey |
int NOT NULL |
The unique numerical identifier of an AVEVA Historian server. ServerKey is a foreign key from the ServerList table. |
|
(FK) TagName |
TagNameType |
The unique name of the tag within the AVEVA Historian system. TagName is a foreign key from the Tag table. |
|
TagType |
int NOT NULL |
The type of tag. 1 = Analog; 2 = Discrete; 3 = String; 4 = Complex; 5 = Event, 7 = Summary tag (analog or state). |