Nowadays, ontologies are used in several research domains by offering the means to describe and represent concepts of information sources. Therefore, several approaches and systems storing ontologies and their instances in the same repository (database) have been proposed. As a consequence, defining a query language to support ontology-based database (OBDB) becomes a challenge for the database ...

A Functional Database Phil Trinder D.Phil. Thesis Wolfson College Michaelmas Term, 1989 This thesis explores the use of functional languages to implement, manipulate and query databases. Implementing databases. A functional language is used to construct a database manager that allows e cient and concurrent access to shared data. In contrast to the locking mechanism found in conventional databas...

The cycle of abstraction-reconstruction, which occurs as a fundamental principle in the development of culture and in cognitive processes, is described and analyzed. This approach leads to recognition of boundary conditions for and directions of probable development of cognitive tools. It is shown how the transition from a conventional Japanese-English character dictionary to a multi-dimensiona...

In some research analysis organizations, effort is duplicated when disseminating raw information to multiple research groups. Although the various groups work on different problems, many times, the initial raw information used is the same. A solution to this problem is creating a centralized process for storing and disseminating common information using database technologies. In this paper, the...

In the present computing world, most new-generation database applications demand intelligent interface to enhance efficient interactions between database and the users. The most accessible interfaces for databases must be intelligent and able to understand natural language expressions. In this paper mapping of natural language queries to SQL is discussed. We propose a general architecture for a...

This paper deals with the principles of rule-based systems in databases and gives an overview of existing approaches. First, we introduce the concept of rules. The application of rule-based systems to databases is categorized. Deductive database systems are introduced as the first extension of classical database management systems. We briefly describe the concept of deductive databases and thei...

We describe a functional database language OR-SML for handling disjunctive information in database queries, and its implementation on top of Standard ML 21]. The core language has the power of the nested relational algebra, and it is augmented with or-sets which are used to deal with disjunctive information. Sets, or-sets and tuples can be freely combined to create objects, which gives the lang...

This paper describes the design of storage and access structures for a high performance Ada* compatible database management system. This system supports the database application programming language ADAPLEX ISmith81, Smith821, which is the result of embedding the database DAPLEX [ Shipman 1 sublanguage in the general purpose language Ada [DoD80 1. A prominent feature of the underlying data mode...

We demonstrate through a sample application, Ebanking, that the Web Service Modelling Language Ontology component can be used as a very powerful object-oriented database design language with logic capabilities. Its conceptual syntax allows the definition of class hierarchies, and logic syntax allows the definition of constraints in the database. Relations, which are available for modelling rela...

In this paper we examine the connection between two areas of semantics, namely the semantics of historical databases and the semantics of natural language querying, and link them together via a common view of the semantics of time. Since the target application domain is an historical database, we present the essential features of the Historical Relational Database Model (HRDM), an extension to ...