7 OPC UA DataTypes 
7.6 AASCategoryDataType
The CategoryDataType is defined in Table 73.
Table 73 – AASCategoryDataType enum Definition
| Name | Value | Description |
|---|---|---|
| CONSTANT | 0 | Values does not change over time |
| PARAMETER | 1 | Typically once value is set, it will not change over time |
| VARIABLE | 2 | Value is calculated or changed during runtime |
| RELATIONSHIP | 3 | Relationship |