1. A method of specifying, in a schema mapping framework of a computing environment, a mapping between a source schema and a target schema, comprising: registering a first plurality of heterogeneous schemas and a second plurality of heterogeneous schemas, wherein any schema of said first plurality is capable of being said source schema, and any schema of said second plurality is capable of being said target schema, and wherein said source schema and said target schema are capable of being schemas of different types; serializing a mapping model of said schema mapping framework into one or more mapping objects including a plurality of logical references that includes a first set of one or more logical references and a second set of one or more logical references, said one or more logical references of said first set representing said one or more source objects in a one-to-one correspondence, and said one or more logical references of said second set representing said one or more target objects in a one-to-one correspondence; loading said one or more mapping objects into a memory; and resolving, responsive to said loading, said first set to said one or more source objects, and said second set to said one or more target objects, wherein said resolving includes storing a plurality of pointers that include a source side set of one or more pointers to said one or more source objects, and a target side set of one or more pointers to said one or more target objects, and wherein said memory includes, responsive to said resolving, said mapping model including said plurality of logical references and said plurality of pointers.