159
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SEKE
1995
Springer
15 years 8 months ago
1995
Springer
The development of a large information system is generally regarded as one of the most complex activities undertaken by organizations and it is dependent on the communication and u...
186
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SDB
1995
15 years 8 months ago
1995
Most of work on partial information in databases asks which operations of standard languages, like relational algebra, can still be performed correctly in the presence of nulls. In...
117
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SDB
1995
15 years 8 months ago
1995
In this paper we discuss two data models for spatial database systems: the linear data model and the topological data model. Both can be used to model a wide range of applications....