Conceptual data models, being the tool of design databases, have been proposed. Information in real world application is often vague or ambiguous. Currently, less research has been done in modeling imprecision and uncertainty in conceptual data model. The UML (Unified Modeling Language), being a set of OO modeling notations and a standard of the Object Management Group (OMG), can be applied for many areas of software engineering, knowledge engineering, and data modeling. In this paper, different levels of fuzziness are introduced into the class of the UML.
['Zhen Ma']
Fuzzy Conceptual Information Modeling in UML Data Model