Optimizing and executing DAPLEX queries using Prolog
The Computer Journal - On concurrent logic programming
Object-oriented databases: a semantic data model approach
Object-oriented databases: a semantic data model approach
ACM SIGMOD Record
An overview of the object protocol model (OPM) and the OPM data management tools
Information Systems - Special issue: databases: their creation, management and utilization
The functional data model and the data languages DAPLEX
ACM Transactions on Database Systems (TODS)
A Data Transformation System for Biological Data Sources
VLDB '95 Proceedings of the 21th International Conference on Very Large Data Bases
Efficient Access to FDM Objects Stored in a Relational Database
BNCOD 12 Proceedings of the 12th British National Conference on Databases: Directions in Databases
A Federated DBMS-Based Integrated Environment for Molecular Biology
Proceedings of the Seventh International Working Conference on Scientific and Statistical Database Management
Improving Federated Database Queries Using Declarative Rewrite Rules for Quantified Subqueries
Journal of Intelligent Information Systems
Collection Views: Dynamically Composed Views which Inherit Behaviour
BNCOD 17 Proceedings of the 17th British National Conferenc on Databases: Advances in Databases
Beyond Interoperability - Tracking and Managing the Results of Computational Applications
SSDBM '97 Proceedings of the Ninth International Conference on Scientific and Statistical Database Management
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There is unavoidable heterogeneity in the databanks and databases currently used for biological data collections. We are aiming to develop a system that will provide uniform access to heterogeneous databases via a single high-level query language or graphical interface and will enable multi-database queries. We have taken an approach in which high-level code in an object-oriented database system (based on the functional data model) is used effectively as a mediator between distributed heterogeneous databases. The resulting system enables us to ask queries that combine, for example, geometric calculations on three-dimensional protein structures stored locally and access to databanks held at the European Bioinformatics Institute, while making use of existing search engines and indexes when accessing remote data.