How Good is a UML Diagram? A Tool to Check It

UML is well accepted by practitioners for developing object oriented programs. Different views of an application are specified by different types of UML diagrams. A UML diagram is said to be good when it is structurally consistent. Consistency checking of UML diagrams can be made using OCL constraints. OCL constraints are translated to SQL triggers defined on databases that store UML diagrams. Structural inconsistency can be checked through SQL triggers applicable on the appropriate table that stores the diagram. In this paper, we describe a tool developed to check structural consistency of UML diagrams. This has been achieved through a generic method of translating OCL to SQL and strategies for checking structural consistency of well defined diagrams.