OOPLSA '86 Conference proceedings on Object-oriented programming systems, languages and applications
Development of an object-oriented DBMS
OOPLSA '86 Conference proceedings on Object-oriented programming systems, languages and applications
IFO: a formal semantic database model
ACM Transactions on Database Systems (TODS)
Types and persistence in database programming languages
ACM Computing Surveys (CSUR)
Semantic database modeling: survey, applications, and research issues
ACM Computing Surveys (CSUR)
Set operations in a data model supporting complex objects
EDBT '90 Proceedings of the 2nd international conference on extending database technology: Advances in Database Technology
Evaluating aggregates in possibilistic relational databases
Data & Knowledge Engineering
The functional data model and the data languages DAPLEX
ACM Transactions on Database Systems (TODS)
Database description with SDM: a semantic database model
ACM Transactions on Database Systems (TODS)
Extending the database relational model to capture more meaning
ACM Transactions on Database Systems (TODS)
A language facility for designing database-intensive applications
ACM Transactions on Database Systems (TODS)
The entity-relationship model—toward a unified view of data
ACM Transactions on Database Systems (TODS) - Special issue: papers from the international conference on very large data bases: September 22–24, 1975, Framingham, MA
Database abstractions: aggregation and generalization
ACM Transactions on Database Systems (TODS)
Set Restrictions for Semantic Groupings
IEEE Transactions on Knowledge and Data Engineering
A Semantic Integrity Framework: Set Restrictions for Semantic Groupings
Proceedings of the Seventh International Conference on Data Engineering
Tools for view generation in object-oriented databases
CIKM '93 Proceedings of the second international conference on Information and knowledge management
A classification algorithm for supporting object-oriented views
CIKM '94 Proceedings of the third international conference on Information and knowledge management
A Transparent Schema-Evolution System Based on Object-Oriented View Technology
IEEE Transactions on Knowledge and Data Engineering
Multiview: A Methodology for Supporting Multiple Views in Object-Oriented Databases
VLDB '92 Proceedings of the 18th International Conference on Very Large Data Bases
OODB support for providing transparent schema changes
CASCON '94 Proceedings of the 1994 conference of the Centre for Advanced Studies on Collaborative research
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The semantics of set operations are not adequate for the richer data models of object-based database systems that include object-oriented and semantic data modeling concepts. The reason is that precise semantics of set operations on complex objects require a clear distinction between the dual notions of a set and a type, both of which are present in the class construct found in object-based data models. This gap is filled here by a framework for executing set theoretic operations on the class construct. The proposed set operations, including set difference, union, intersection and symmetric difference, determine both the type description of the derived class as well as its set membership. For the former, inheritance rules are developed for property characteristics such as single-valued versus multivalued and required versus optional. For the latter, the object identity concept is developed if borrowed from data modeling research. The framework allows for property inheritance among classes that are not necessarily IS-A related.