Descriptor
Source
| Information Systems | 3 |
Author
| Lakshmanan, Laks V. S. | 1 |
| Manolopoulos, Yannis | 1 |
| Nardelli, Enrico | 1 |
| Papadopoulos, Apostolos | 1 |
| Proietti, Guido | 1 |
| Ram, Sudha | 1 |
| Ramesh, Venkatar | 1 |
| Sadri, Fereidoon | 1 |
Publication Type
| Journal Articles | 3 |
| Reports - Research | 3 |
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Peer reviewedLakshmanan, Laks V. S.; Sadri, Fereidoon – Information Systems, 1997
Considers a "hybrid" approach to the modeling of uncertainty in deductive databases. The model, deductive IST (DIST) is based on an extension of the "Information Source Tracking" (IST) model for relational databases. Proves that the complexity of testing containment of conjunctive DIST queries remains the same as in the…
Descriptors: Databases, Deduction, Information Processing, Information Seeking
Peer reviewedRamesh, Venkatar; Ram, Sudha – Information Systems, 1997
Presents a seven-step methodology for utilizing integrity constraint knowledge from heterogeneous databases. Describes generating a set of integrity constraints applicable at the integrated level from constraints specified on local databases. Introduces the concept of constraint-based relationships between objects in heterogeneous databases;…
Descriptors: Computer System Design, Databases, Information Processing, Information Technology
Peer reviewedManolopoulos, Yannis; Nardelli, Enrico; Papadopoulos, Apostolos; Proietti, Guido – Information Systems, 1997
Investigates the manipulation of large sets of two-dimensional data representing multiple overlapping features, and presents a new access method, the MOF-tree. Analyzes storage requirements and time with respect to window query operations involving multiple features. Examines both the pointer-based and pointerless MOF-tree representations.…
Descriptors: Computer System Design, Database Design, Database Management Systems, Information Management
