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database, project The Aditi Deductive Database System. A
multi-user deductive database system from the Machine
Intelligence Project at the University of Melbourne. It
supports base relations defined by facts (relations in the
defined by rules that specify how to compute new information
from old information.
Both base relations and the rules defining derived relations
are stored on disk and are accessed as required during query
evaluation. The rules defining derived relations are
expressed in a Prolog-like language, which is also used for
expressing queries.
Aditi supports the full structured data capability of Prolog.
Base relations can store arbitrarily nested terms, for example
arbitrary length lists, and rules can directly manipulate such
terms. Base relations can be indexed with B-trees or
multi-level signature files.
Users can access the system through a Motif-based query and
database administration tool, or through a command line
interface. There is also in interface that allows NU-Prolog
programs to access Aditi in a transparent manner. Proper
transaction processing is not supported in this release.