Titlebook: Statistical and Scientific Database Management; Fourth International Maurizio Rafanelli,John C. Klensin,Per Svensson Conference proceedings

确保

colony

镀金

The classification problem with semantically heterogeneous data,mple procedure for deciding the answerability of a summary query and evaluating it, if answerable. Surprisingly, the condition of derivability is independent of the database instance and is dependent only on the topological properties of the graph modelling the semantical connection of the classification systems adopted.

极力证明

Database issues for a veterinary medical expert system, system involving all test results is being implemented. This paper shows how a combination of INGRES and the ‘C’ programming language can be used as a knowledge base to support these different methodologies.

NIP

宽度

外观

Handling time in query languages,ogic. New syntax for retrieval statements is defined in order to separate the process of selecting entities (tuples) and the process of selecting required values of temporal attributes from the chosen entities. The extensions presented in this paper offer a good degree of flexibility in expressing different temporal requirements.

Inferior

玩笑

Automatic drawing of statistical diagrams, of statistical diagrams, according to a set of aesthetics. The algorithm receives as input a graph, representing a statistical schema, and produces a drawing of the corresponding diagram, through an incremental specification of its features.

刻苦读书

GQL, a graphical query language for semantic databases,scribes various aspects of GQL: the underlying model, the pattern images and graphs, and the representation of operations. Implementational issues of a GQL interpreter and its relation to other query languages are also discussed.