The Unified Dimensional Model (UDM) is the model for data in a SQL Server Analysis Services (SSAS) database. The UDM is unified because it combines data from multiple relational databases into a single place and a single model. The model describes its data using dimensions, hence it is a dimensional model.
The UDM comprises these main components:
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Horizon_Net edited Revision 18. Comment: added link to German version
Fernando Lugão Veltem edited Revision 7. Comment: added portuguese version
Ed Price MSFT edited Revision 6. Comment: Added "See Also" links.
Ed Price MSFT edited Revision 3. Comment: External links would go in a Community Resources section. I'm working on the guidelines for all this.
Matt Burr MSFT edited Revision 1. Comment: Added a link to an MSDN article that describes the UDM in some more depth.