Database Semantics (DBS) is a computational model of how communicating with natural language works. Defined at a level of abstraction which may be applied to natural and artificial agents alike, such a model is a precondition for achieving free human-machine communication in natural language, and thus has great potential for a wide range of practical applications. The basic functionality of DBS...

One of the most ubiquitous elements of modern computing is the relational database. Very few modern applications are created without some sort of database backend. Unfortunately, relational database concepts are fundamentally very different from those used in generalpurpose programming languages. This creates an impedance mismatch between the the application and the database layers. One solutio...

A nested bitemporal relational data model and its query language are implemented. The bitemporal atom (BTA) is the fundamental construct to represent temporal data and it contains 5 components: a value, the lower and upper bounds of valid time, and the lower and upper bounds of the recoding time. We consider 2 types of data structures for storing BTAs: 1) string representation and 2) abstract d...

I n t r o d u c t i o n P r o j e c t M U R A S A K I The purpose of Project MURASAKI is to develop a foreign language text understanding system that will demonstrate the extensibility of message understanding technology3 In its current design, Project MURASAKI will process Spanish and Japanese text and extract information in order to generate records in both natural language databases, respect...

This paper presents an extension to a database rule language Comp& to support parallelism. The rule language is called RDLIIC and is based on an extended orrsion of tuple relational calculus. The grain of parallelism introduced into RDL//C is the production rule. The user is made aware of parallel processing by having to specify in a sub-language of control which sets of r&s are to run in paral...

DTL’s DataSpot is a database publishing tool that enables non-technical end users to explore a database using free-form plain language queries combined with hypertext navigation. DataSpot is based on a novel representation of data in the form of a schema-less semi-structured graph called a hyperbase. The DataSpot Publisher takes one or more possibly heterogeneous databases, predefined knowledge...

Users interact with a database system through a set of database languages and this makes designing database languages a very challenging task to a computer software engineer. A set of welldefined database languages must be easy to learn, easy to understand and powerful enough to capture semantic of a problem domain. This paper discusses design issues of a proposed database language, namely Exte...

This paper presents a method of formally representing the information that exists in a relational database. The primary ut i l i ty of such a representation is for deductive questionanswering systems that must access an existing relational database. To respond intelligently to user inquiries, such systems must have a more complete representation of the domain of discourse than is generally avai...

This paper is about Kripke structures that are 1. inside a relational database. 2. queried with a modal language. At first the modal language that is used is introduced, followed by a definition of the database and relational algebra. Based on these definitions two things are described: 1. a mapping from components of the model structure to a relational database schema and instance. 2. a transl...