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Hypertext Manual
Examples of Databases
and Daplex
Semantic
Constraints in P/FDM
3D Graphical Interfaces for PFDM
List of Papers Involving
P/FDM
Getting more information
about P/FDM
Photograph of some of the
current and past members of the Object-Database Group
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Peter Gray
Graham Kemp
Suzanne Embury
Dave Ritchie
Tony Brooks
Kit Ying Hui
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Scott Leishman
John Boyle
Welcome to the P/FDM Home Page
Introduction
P/FDM is a research database system. It began life as an implementation, in Prolog, of a functional data model (FDM). It was later extended to embrace certain features of the object-oriented paradigm. It includes a high-level query (or data manipulation language) called DAPLEX. This declarative language allows non-experts to express what one wants, without explaining how the desired result is to be computed. P/FDM also allows the seamless integration of several underlying storage schemas, invisibly, beneath a single data manipulation interface. The primary application of P/FDM has been to develop a number of large scientific databases. The largest of these databases contains three dimensional protein structural information.Index:
P/FDM is currently being used by members of the KRAFT
consortium, as a substrate for research into knowledge transformation
and manipulation in distributed information systems.
The Bioinformatics Research Group is using P/FDM in a project to develop a mediator to integrate access to heterogeneous, distributed biological databases (Grant Reference: 1/BIF06716).
P/FDM is also being used in a project to develop a theoretical framework for object-oriented databases, using category theory, at the University of Newcastle-upon-Tyne.
The Object Database Group are members of the ACT-NET network.
Current personal home pages of developers:
Home pages of some ex-group members:
Computing Science / Aberdeen
pfdm@csd.abdn.ac.uk