“Revit makes available the following IFC-specific files:
IFC Metric Template.rte. This file allows you to create new projects that are already set to the IFC standard.
IFC Parameter Upgrade.rvt. This file enables you to upgrade an existing project to contain IFC parameters by reading the instructions contained in the IFC Parameter Upgrade.rvt file.
IFC Shared Parameters.txt. This file contains the shared IFC parameters if you want to manually update an existing project to contain all or some of these parameters.
Note: It is recommended that you use the IFC Parameter Upgrade.rvt file. If you use IFC Shared Parameters.txt, you must add parameters one at a time, setting the correct categories for each. If you use IFC Parameter Upgrade.rvt, you can use the Transfer Project Standards tool to add the parameters in one operation.”
