OpenBuildings™ Designer Help

Map DataGroup Types and Properties to IFC dialog

Datagroup types must be mapped to corresponding IFC entities and classes, otherwise they are recognized as an IfcBuildingElementProxy and filtered out for COBie export. Use the Map DataGroup Types and Properties to IFC dialog to map datagroup types to their corresponding IFC Class, Type, and Predefined Type.


Note: The IFC version prefix in the title Map DataGroup Types and Properties to IFC #.#, appears based on the currently active MVD.
SettingDescription
Save To Saves the class type and property mappings to the active Workset or Dataset.
Class Mapping DataGroup classes are mapped to IFC class types in the Class Mapping tab.
  • Class Mapping — All active DataGroup classes are displayed in this column. Scroll down to the DataGroup class that you want to map an IFC class to.
  • IFC Mapping — To map a DataGroup class, select a cell in the IFC Mapping column adjacent to the DataGroup class that you want to map to. This action opens the IFC Entities Classifications drop down box.


    In the IFC Entities Classifications drop down box, scroll through the list to find the IFC class type that you want to map to. Simply double click the item to add it to the IFC Mapping column.
  • Clear Mapping - Used to revert back to previously saved mapping. Enabled if the selected class has a pending change.
Note: Modified mapped entries text style changes to indicate status:

1. Italic indicates Dataset override, 2. Bold italic black indicates Workset override, 3. Bold italic blue indicates unsaved modification to either Workset or Dataset

Property Mapping Datasets are delivered with the necessary mappings; hence you typically do not have to use the Property Mapping utility unless you need to map user-defined properties that are duplicated by IFC properties.
Note: See also this Bentley Communities discussion.
  • Catalog Type — Used to select DataGroup catalog types from the Catalog Type drop down menu.
  • Property Mapping list box
    • DataGroup Properties — DataGroup catalog and user defined properties (if any) for the selected Catalog Type are displayed here.
      Note: Properties in property definition files, with a prefix defined by the configuration variable IFC_MAPPED_PROPERTIES, are not displayed.
    • Mapped IFC Properties — Used to paps IFC properties to DataGroup properties.
      Select a cell adjacent to a DataGroup catalog property to which you want to map. This action opens a drop down list of available properties in the IFC property set.


      Simply click a property, in the property list, to transfer it to the selected cell and click save to save the mapping. The mapped property appears in different color.
      Note: In the Mapped IFC Properties column, the properties displayed with a prefix are defined by the configuration variable IFC_MAPPED_PROPERTIES. Only property sets defined in the buildingSMART IFC specification can be prefixed with Pset_. Additional prefixes (such as ePsets) can be added (comma-delimited) to the configuration variable IFC_MAPPED_PROPERTIES. Pset_ is the default prefix.
Messages Messages regarding mapping operations display here. This message window behaves similarly to the application Status Bar Message Center.
Save Adds the selected item(s) to the mapping table, and dismisses the dialog.
Close Closes the Map DataGroup Types and Properties to IFC dialog without saving.
Key-in: ifcmappingui open