brucker.ea:hol-ocl:2002 BookSection Heidelberg Springer-Verlag 2002 UML 2002: Model Engineering, Concepts and Tools 2460 196-211 BruckerAchimD WolffBurkhart JézéquelJean-Marc HussmannHeinrich CookStephen HOL-OCL: Experiences, Consequences and Design Choices Based on experiences gained from an embedding of the Object Constraint Language (OCL) in higher-order logic \citebrucker.ea:proposal:2002, we explore several key issues of the design of a formal semantics of the OCL. These issues comprise the question of the interpretation of invariants, pre- and postconditions, their transformation, an executable sub-language and the possibilities of refinement notions. A particular emphasize is put on the issue of mechanized deduction in UML/OCL specification.