Property Mapping for IFC Export

File > Interoperability > IFC > IFC Translators

Choose a Translator for Export and open the Property Mapping preset.

From this preset dialog, click the Map IFC Properties for Export to access the mapping definitions.

These mappings define the IFC properties assigned to exported elements.

Tree list of IFC Entities

IFC Entities are listed in the tree at left.

Use the pop-ups if needed to filter the tree list:
- filter by Schema (IFC2x3, IFC4, or IFC4.3)
  - Note: A parent entity, if it can be used for property mapping, will be displayed even if it does not belong to the Schema in the current filter
- filter by domain (Structural or MEP). For example, the Structural domain contains the building element (IfcBuildingElement) types (IfcBeam, IfcColumn, etc.), while the MEP domain contains the IfcDistribution types.
- filter by IFC Assignment types, IFC Type Objects, or IFC Spatial element types (IfcSpatialStructureElements: IfcSite, IfcBuilding, IfcBuildingStorey and IfcSpace).
  Figure 1. Filter IFC Entities in Tree List
  
  Note: IFC Entities in parentheses are necessary to the IFC Schema, but have no Archicad elements assigned to them directly.

List of IFC Properties

The IFC Properties of each selected entity are listed in the IFC Properties column.

Property data assigned to a parent element (such as IfcElement) are automatically assigned to all its child elements (e.g. IfcBeam, IfcColumn, IfcSlab, IfcWall, etc.)
X: Delete any data item by clicking the red X. Attributes cannot be deleted.
BOLD TYPE: IFC Entities which have property set data assigned to them are shown in BOLD.
BLUE TYPE: Properties of a child element are shown in blue type. You can see its parent type name in parentheses.
Chain icon: Indicates that the property has a mapping rule. View its mapping rule at the right side of the dialog box.
See How to create a Mapping Rule.

Property assignment can be modified only at the parent level. Thus, to create a common property for all building elements, you don’t have to create it for every single building element type (IfcWall, IfcColumn, IfcSlab, etc.): instead, create it once at a higher level (e.g. at IfcElement).

Add New Property/Classification Reference

You can create a custom property for all elements of a particular IFC type.

Select the item.
Click New.

For details, see Create New IFC Property/Classfication.

Import from Current Project

You may have created custom IFC properties for individual elements, through either IFC Project Manager or the element settings dialog. To add those custom properties to the Property Mapping dialog, click Import from current Project.

Note: If a custom property assigned to an IFC element type (for example IfcWall) is not yet available in the current project, it is not displayed in the IFC management dialogs until one instance of the type has been defined in the model.

Clear All Settings

Delete the entire contents (mapping rules, Properties and Classification References) of the current Property Mapping Preset.