Multivalued dependencies and a new normal form for relational databases
ACM Transactions on Database Systems (TODS)
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An Introduction to Database Systems
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SIGSMALL '88 Proceedings of the 1988 ACM SIGSMALL/PC symposium on ACTES
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PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
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Journal of the ACM (JACM)
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Proceedings of the seventh ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
On the expressive power of database queries with intermediate types
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On an algebra for historical relational databases: two views
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
A method for constructing generalized non-normal-form models
CSC '91 Proceedings of the 19th annual conference on Computer Science
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CSC '91 Proceedings of the 19th annual conference on Computer Science
On extending the functions of a relational database system
SIGMOD '82 Proceedings of the 1982 ACM SIGMOD international conference on Management of data
NeT & CoT: translating relational schemas to XML schemas using semantic constraints
Proceedings of the eleventh international conference on Information and knowledge management
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PODS '84 Proceedings of the 3rd ACM SIGACT-SIGMOD symposium on Principles of database systems
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The VLDB Journal — The International Journal on Very Large Data Bases
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Object-Oriented Databases: Definition and Research Directions
IEEE Transactions on Knowledge and Data Engineering
A FAD for Data Intensive Applications
IEEE Transactions on Knowledge and Data Engineering
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A Database Perspective on Geospatial Data Modeling
IEEE Transactions on Knowledge and Data Engineering
On the architecture of a system integrating data base management and information retrieval
SIGIR '82 Proceedings of the 5th annual ACM conference on Research and development in information retrieval
Near-Optimum Storage Models for Nested Relations Based on Workload Information
IEEE Transactions on Knowledge and Data Engineering
Algorithms and applications for universal quantification in relational databases
Information Systems - Special issue: Best papers from EDBT 2002
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ICDT '03 Proceedings of the 9th International Conference on Database Theory
Typing Graph-Manipulation Operations
ICDT '03 Proceedings of the 9th International Conference on Database Theory
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VLDB '83 Proceedings of the 9th International Conference on Very Large Data Bases
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VLDB '99 Proceedings of the 25th International Conference on Very Large Data Bases
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FAD, a Powerful and Simple Database Language
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On Multisets in Database Systems
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Representing and Querying Semistructured Web Data Using Nested Tables with Structural Variants
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Attribute Metadata for Relational OLAP and Data Mining
DBPL '01 Revised Papers from the 8th International Workshop on Database Programming Languages
A Comparative Study of Noncontextual and Contextual Dependencies
ISMIS '00 Proceedings of the 12th International Symposium on Foundations of Intelligent Systems
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Proceedings of the VLDB Endowment
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Usually, the first normal form condition of the relational model of data is imposed. Presently, a broader class of data base applications like office information systems is considered where this restriction is not convenient. Therefore, an extension of the relational model is proposed consisting of Non First Normal Form (NF2) relations. The relational algebra is enriched mainly by so called nest and unnest operations which transform between NF2 relations and the usual ones. We state some properties of these operations and some rules which occur in combination with the operations of the usual relational algebra. Since we propose to use the NF2 model also for the internal data model these rules are important not only for theoretical reasons but also for a practical implementation.