The two roles of nested relations in the DASDBS project | Zendy

HansJörg Schek | Zendy; Marc H. Scholl | Zendy

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The two roles of nested relations in the DASDBS project

Author(s) -

HansJörg Schek,

Marc H. Scholl

Publication year - 1989

Publication title -

lecture notes in computer science

Language(s) - English

Resource type - Book series

SCImago Journal Rank - 0.249

H-Index - 400

eISSN - 1611-3349

pISSN - 0302-9743

ISBN - 0-387-51171-7

DOI - 10.1007/3-540-51171-7_20

Subject(s) - computer science , relational database , nested set model , relational model , relational algebra , kernel (algebra) , data model (gis) , extensibility , database model , programming language , theoretical computer science , entity–relationship model , database , artificial intelligence , mathematics , discrete mathematics

The paper gives an overview of the nested relational model and its two roles in the Darmstadt Database System (DASDBS) project, which was started in 1982 to develop an extensible database architecture supporting a variety of application specific front-ends with a common kernel system. In its first role the nested relational model serves as a model for the kernel interface describing hierarchical storage clusters. In its second role the nested relational algebra appears as a basic language for a KL-ONE-oriented semantic data model at an object-oriented layer upon the kernel.

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