SIGMOD '91 Proceedings of the 1991 ACM SIGMOD international conference on Management of data
Object-oriented databases: a semantic data model approach
Object-oriented databases: a semantic data model approach
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 MultiView OODB view system: design and implementation
Theory and Practice of Object Systems - Special issue on subjectivity in object-oriented systems
The functional data model and the data languages DAPLEX
ACM Transactions on Database Systems (TODS)
The Evolving Role of Constraints in the Functional Data Model
Journal of Intelligent Information Systems - Special issue on functional approach to intelligent information systems
Object Relational DBMSs: The Next Great Wave
Object Relational DBMSs: The Next Great Wave
Using the Functional Data Model to Integrate Distributed Biological Data Sources
SSDBM '96 Proceedings of the Eighth International Conference on Scientific and Statistical Database Management
| Hi-index | 0.00 |
Collection Views provide a means of coercing an object (or set of objects) of one type into an equivalent set of objects of another, more useful type. For example, in some circumstances it may be more convenient to view a shape object as a set of coordinate objects -- in order to use a method to display the shape on the screen, for example. Collection views provide the DBMS with information on how to perform this coercion automatically. The DBMS can then adapt sets of values retrieved from some level of an is-part-of hierarchy, so that they are usable by pre-defined method functions defined on collections of parts. This adaptation is performed by composing a series of functions at runtime, rather than requiring the user to anticipate the queries that will be asked and create many stored classes to support them. Collection views thus allow stored data to inherit method behaviour defined in external applications, withour requiring the user to modify that behaviour or to store modified copies of the data. We have extended the P/FDM system to support collection views, and have demonstrated their utility by a bioinformatics example.