Did you know there's a free Classification Manager tool available for Autodesk Revit. It allows you to assign classifications in US (OmniClass, MasterFormat, UniFormat) or UK (Uniclass 2015) classifications or your own custom one. This is very useful to help identify and filter information throughout the design and construction lifecycle as this information is available in Revit, Navisworks and the BIM 360 tools.
You can download this as well as COBie tools and Model Checkers from www.biminteroperabilitytools.com
The playlist below gives you full training in setting up and using the Classification Manager as well as advanced workflows like setting up shortcuts for quicker entry, creating schedules with the classifications and creating custom databases for your country or company or trade. This last part is very useful if you wanted to add costing classifications, or repeatable information like fire ratings or manufacturer information.