IFC Schema Versions and Scope

An IDS can specify which IFC schema versions it applies to. The current IDS standard supports IFC 2X3, IFC4, and IFC4X3 (in particular IFC4X3 Addendum 2) . You can tag each Specification with the relevant IFC version(s). If an IFC model of a different version is checked, the Specification can be considered not applicable. In practice, many IDS files target IFC4 or IFC4X3, but it's possible to allow multiple versions if your requirements are schema-agnostic.

Note: IDS assumes the IFC model being checked is valid against the IFC schema. IDS checking is not a substitute for basic IFC schema validation. If the model has fundamental schema errors (like an IfcWall with an invalid attribute type, etc.), the IDS might not work correctly on that model . Always ensure the model is exported correctly according to the IFC specification.