You can export Revit building modeling information to the Industry Foundation Classes (IFC) file format.
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About the IFC File Format
The Industry Foundation Classes (IFC) file format was developed by buildingSMART®. IFC provides an interoperability solution between different software applications. The format establishes international standards to import and export building objects and their properties.
About Revit and IFC Revit provides IFC import and fully certified export based on buildingSMART® IFC data exchange standards.
Supported IFC Classes
Before exporting a project to IFC, check the following list to make sure that Revit supports the desired IFC classes.
Export a Project to IFC
Save a project as an IFC file for use with an IFC-certified application that does not use the RVT file format.
Specify IFC Entities for Families Revit exports building elements to an IFC file based on the categories (and subcategories) to which the elements belong.