Class Definitions
- Last UpdatedNov 04, 2025
- 1 minute read
Classes are used to enable each process equipment and process line type to have its own tag formats. Each class is allocated tag formats. Process equipment types are in turn allocated a class.
For more information on how to create and edit tag formats, see Tag Formats.
For more information on how to create and edit process equipment types (including how to assign classes), see Process Equipment Type Catalog.
Classes are defined and allocated tag formats using the Class Definitions window, accessed by selecting Setup > Class Definitions in the Project tab.

The window initially lists the existing class definitions for process equipment. To view the class definitions for process lines instead, select Process Lines from the Format for list.