Modularity in Databases
Modularization can be sought for as a technique to provide context-dependent perspectives over a given shared information repository. This chapter presents an approach to database modularization where the modules represent application-specific perspectives over the shared database. The approach is meant to support the creation/definition of the modules as part of the conceptual schema definition process, that is to say the modules and the database they are a subset of are simultaneously defined. This is similar to Cyc’s approach to ontological microtheories definition. The chapter develops both intuitive and formal definition of the proposed approach. It also shows the basics of how the modules are used by user transactions and of how the overall multiperception database can be implemented on a commercial database management system.
KeywordsGeographic Information System Object Type Relationship Type Cardinality Constraint Land Plot
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- 1.Al-Jadir, L., Parent, C., Spaccapietra, S.: OntoMind: Reasoning with Large DL Ontologies Stored in Relational Databases (2009) (in preparation)Google Scholar
- 5.Cycorp. What is a context (2006), http://www.cyc.com/cycdoc/course/what-is-a-context.html
- 6.Lenat, D.B., Guha, R.V.: Building Large Knowledge-Based Systems. In: Representation and Inference in the Cyc Project. Addison-Wesley, Reading (1989)Google Scholar
- 7.Mylopoulos, J., Motschnig-Pitrig, R.: Partitioning information bases with contexts. In: Proceedings of the 3rd International Conference On Cooperative Information Systems, CoopIs 1995, pp. 44–54 (1995)Google Scholar
- 9.Open Geospatial Consortium Inc. OpenGIS Implementation Specification for Geographic information – Simple feature access – Part 2: SQL option OGC 06-104r3, Version 1.2.0 (2006)Google Scholar