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AVEVA™ Historian

EngineeringUnitDimension

  • Last UpdatedMar 10, 2025
  • 1 minute read

Contains one row for each defined engineering unit dimension.

Column

Data Type

Description

(PK) EUDKey

int NOT NULL

The unique numerical identifier of a unit of measure's dimension.

Dimension

nvarchar(50) NOT NULL

The unit of measure's dimension name. For example, temperature, flow rate, length. Case-sensitivity depends on the default database collation.

BaseEUCKey

int NOT NULL

The unique numerical identifier of the base catalog unit for the given dimension. Linear conversions will be performed via the base unit. Foreign key to the EngineeringUnitCatalog table. Default value is 0 when creating a new dimension.

(FK) IntegralEUDKey

int NULL

The unique numerical identifier for this dimension's integral dimension. If not null, it indicates that accumulating units over time in this dimension results in units in the integral dimension. For example, the Volumetric Flow dimension's integral dimension is Volume.

(FK) DerivativeEUDKey

int NULL

The unique numerical identifier for this dimension's derivative dimension. If not null, it indicates that derivation of units over time in this unit results in units in the derivative dimension. For example, the Length dimension's derivative dimension is Speed.

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