TABLE 1: Summary of Information Models in Microsoft Repository 2.1
RTIM	Repository Type Information Model; the meta-meta model
Uml	Uml model; a representation of the conceptual UML 1.0 model, an industry standard for analyzing, specifying, designing, constructing, and visualizing the artifacts of a software system
Umx	UML Extension model; a set of generic extensions to UML that realizes the potential of some of UML 1.0's predefined stereotypes
Dtm	Data Type model; a set of Uml extensions that supply numerous common data types
Cde	Component Description model; a set of generic component-related Uml extensions that describe runtime (executable) components and those components' specifications
Com	COM model; a set of COM-specific extensions to the Cde model and the Dtm model
Gen	Generic model; a set of general-purpose interfaces that is relevant across diverse information models
Dbm	Database model; a set of extensions to the Uml model that cover generic database concepts
Sql	SQL Server model; a set of Microsoft SQL Server-specific extensions to the Dbm model
Ocl	Oracle model; a set of Oracle-specific extensions to the Dbm model
Db2	DB2 model; a set of DB2-specific extensions to the Dbm model
Ifx	Informix model; a set of Informix-specific extensions to the Dbm model
Tfm	Database Transformation model; a description of movement of data between databases
Olp	OLAP model; an extension of the Dbm model that describes multidimensional databases
Sim	Semantic Information model; an extension of the Dbm model that lets users interact with database data without learning query languages
Source: Microsoft (http://msdn.microsoft.com/repository/oim)