Temporal generalization with domain generalization graphs

This paper addresses the problem of using domain generalization graphs to g eneralize temporal data extracted from relational databases. A domain gener alization graph associated with an attribute defines a partial order which represents a set of generalization relations for the attribute. We propose formal specifications for domain generalization graphs associated with cale ndar (date and time) attributes. These graphs are reusable (i.e. can be use d to generalize any calendar attributes), adaptable (i.e. can be extended o r restricted as appropriate for particular applications), and transportable (i.e. can be used with any database containing a calendar attribute).