The relational model with relation-valued attributes
Information Systems
SIGMOD '86 Proceedings of the 1986 ACM SIGMOD international conference on Management of data
Data model issues for object-oriented applications
ACM Transactions on Information Systems (TOIS)
Semantics and implementation of schema evolution in object-oriented databases
SIGMOD '87 Proceedings of the 1987 ACM SIGMOD international conference on Management of data
Class modification in the GemStone object-oriented DBMS
OOPSLA '87 Conference proceedings on Object-oriented programming systems, languages and applications
Types and persistence in database programming languages
ACM Computing Surveys (CSUR)
A semantics of multiple inheritance
Information and Computation - Semantics of Data Types
Modeling inheritance and genericity in object-oriented databases
Lecture notes in computer science on ICDT '88
Type theories and object-oriented programmimg
ACM Computing Surveys (CSUR)
An algebra for structured office documents
ACM Transactions on Information Systems (TOIS)
Object identity as a query language primitive
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Modeling complex structures in object-oriented logic programming
PODS '89 Proceedings of the eighth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
The O2 object manager: an overview
VLDB '89 Proceedings of the 15th international conference on Very large data bases
The O2 database programming language
VLDB '89 Proceedings of the 15th international conference on Very large data bases
Null values in data base management a denotational semantics approach
SIGMOD '79 Proceedings of the 1979 ACM SIGMOD international conference on Management of data
Closed World Databases Opened Through Null Values
VLDB '88 Proceedings of the 14th International Conference on Very Large Data Bases
Theory of Relational Databases
Theory of Relational Databases
An intelligent approach to handling imperfect information in concept-based natural language queries
ACM Transactions on Information Systems (TOIS)
Current Approaches to Handling Imperfect Information in Data and Knowledge Bases
IEEE Transactions on Knowledge and Data Engineering
Modelling uncertainty in multimedia database systems: an extended possibilistic approach
International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems
Extending object-oriented databases for fuzzy information modeling
Information Systems - Databases: Creation, management and utilization
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We present a way to handle incomplete information both at schema and object instance level in an object-oriented database. Incremental schema design becomes possible with the introduction of generic classes. Incomplete data in an object instance is handled with the introduction of explicit null values in a similar way as in the relational and nested relations data models.