Аннотации:
In the article we consider, on the example of development of a
relational database (RDB) information system for Tatneft oil and gas company, an approach to organization of effective search in large arrays of heterogeneous data, satisfying the following essential requirements.
On the one hand, the data is integrated at the semantic level, i.e. the system
supports the presentation of data, describing its semantic properties within an
unified subject domain ontology. Accordingly, end user's request are formulated
exclusively in the subject domain terminology.
On the other hand, the system generates unregulated SQL-queries, i.e. the full
text of possible SQL-queries, not just values of particular parameters, predefined
by the system developers.
Considered approach includes both the possibilities of increasing the reactivity
of the universal SQL queries generation scheme as well as more specific
optimization possibilities, arising from the particular system usage context.
