MORE ON THE ARCHITECTURE

The binary relational query plan is generated from a Moa query at the logical level. Moa is an object query algebra, based on the principle of structural object-orientation. Moa's unique feature is the support of domain-specific structures, which has been exploited in Mirror for the integration of IR in all levels of the DBMS architecture.

In the current implementation, little time has been spent on providing access to the Mirror architecture from the conceptual level. As a result, only applications programmers who write Moa queries can use the Mirror DBMS. In the small screenshot above, the interaction between the current GUI and the Moa level is traced.

In the future, we will support an OQL-like query language for end users on top of Moa and Monet, extended with some special constructs for specification of relevance judgements. Until that moment, end users are limited to the functionality specified in pre-defined forms, such as the GUI we demonstrated in this tour.

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Last updated: December 9, 1999
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