The Classification schema

Classification Systems are supported by the DataGroup System sets associated property values for classification via OmniClass Classifications dialog.

Property Name	Description
Classification \| MasterFormat Classification \| OmniClass Classification \| UniFormat	`<alpha-numeric characters>` Sets the IFC Entity and Type via OmniClass Classifications dialog. Sets associated property values for classification in MasterFormat, OmniClass, and UniFormat.
Classification Description	`<alpha-numeric characters>` Displays Object Classification description of entity in respective formats.