This paper discusses two ways to establish the connection between two levels in a multi-level model. The first approach uses normal associations and generalizations under the assumption that the multi levels are represented in one UML and OCL model. The second approach views a middle level model both as a type model and as an instance model and introduces operations to navigate between the type and instance level. The paper reports on some experiments that have been carried out. Keywords. UML, OCL, Model, Multi-level model, Metamodel, Level connection.