Abstract. This paper proposes an extension to the Value Concatenation / Value Separation schema transformation defined for Object-Role Modeling.
The basic transformation can be applied to convert a many-to-many fact type to a functional fact type. When applied, the transformation generates a new multi-valued object type where values are derived from an existing single-valued object type.
Motivated by techniques applied in dimensional modeling applications, Value Grouping considers the various options available in the grouping process and is seen as an extension to the basic Value Concatenation / Value Separation schema transformation.
Ron McFadyen, University of Winnipeg (Canada)