EAS-E: an integrated approach to application development
EAS-E (pronounced EASY) is an experimental programming language integrated with a database management system now running on VM/370 at...
ODE: Ontology-assisted data extraction
Online databases respond to a user query with result records encoded in HTML files. Data extraction, which is important...
Formal semantics for time in databases
The concept of a historical database is introduced as a tool for modeling the dynamic nature of some part...
Database description with SDM: a semantic database model
SDM is a high-level semantics-based database description and structuring formalism (database model) for databases. This database model is designed...
Consequences of assuming a universal relation
Although central to the current direction of dependency theory, the assumption of a universal relation is incompatible with some...
A normal form for precisely characterizing redundancy in nested relations
We give a straightforward definition for redundancy in individual nested relations and define a new normal form that precisely...
Database abstractions: aggregation and generalization
Two kinds of abstraction that are fundamentally important in database design and usage are defined. Aggregation is an abstraction...
Explaining ambiguity in a formal query language
The problem of generating reasonable natural language-like responses to queries formulated in nonnavigational query languages with logical data independence...
A formal approach to the definition and the design of conceptual schemata for databased...
A formal approach is proposed to the definition and the design of conceptual database diagrams to be used as...
Incomplete information costs and database design
This paper presents a methodology for trading-off the cost of incomplete information against the data-related costs in the design...
