LOA: The LOGIDATA+ Object Algebra
In this paper we present the Logidata Object Algebra (LOA), an algebra for complex objects which has been developed within LOGIDATA+, a national project funded by the Italian National Research Council, as an internal language in a prototype system for the management of extended relational databases with complex object types. LOA is a set-oriented manipulation language which was conceived as an internal language for a prototype system.