определяемый пользователем тип данных CLR(A user-defined data type created against a SQL Server assembly whose implementation is defined in an assembly created in the .NET Framework common language runtime (CLR))
пользовательский тип(A data type that is defined in a program. A user-defined data type generally contains many different data types that are defined by the programming language being used. In COBOL, UDTs are called RECORDS: that is, any declaration containing lower-level numbers; A user-written extension to the scalar type system in SQL Server)