Ontology-based data access (OBDA) generalizes query answering in relational databases. It allows to query a databaseby using the language of an ontology, abstracting from the actual relations of the database. OBDA can sometimes berealized by compiling the information of the ontology into the query and the database. The resulting query is thenanswered using classical database techniq...

We describe a robust speech understanding system based on our newly developed approach to spoken language processing. We show that a robust NLU system can be rapidly developed using a relatively simple speech recognizer to provide sufficient information for database retrieval by spoken language. Our experimental system consists of three components: a speech recognizer based on HMM, a natural la...

Many applications require that all data updates be stored on and retrieved from a database. Such requirement is supported on object oriented databases through versioning. While most related work focuses on different aspects of versions concepts, design modeling and efficient processing of versions, there is yet to be a precise definition of a query language for database systems with versions co...

This paper addresses the semantic issue of exceptions in natural language texts. After observing that rst-order logic is not adequate for semantic representations of natural language , we make use of extended logic programs for meaning representation and inference engine in natural language processing. We show how to generate semantics of texts through deductive parsing by using deenite clause ...

to determine the answer the user's query. I. INTRODUCTION Typically, natural language database interfaces use parsing to identify and categorise the user's input [1]. The parsing process requires the creation of a lexicon, which includes both database specific and non-database specific terms. Different natural language database interfaces (NLDI's) use different methods to create the database sp...

This paper presents a dense database study of child language acquisition from a usage-based perspective of language acquisition and a new analysis of data from an earlier study on simulating language evolution. The new analysis is carried out to show how computer modelling studies can be designed to generate predictions (results) that can be compared quantitatively with empirical data obtained ...

WordNet is an online lexical resource which expresses unique concepts in a language. English WordNet is the first WordNet which was developed at Princeton University. Over a period of time, many language WordNets were developed by various organizations all over the world. It has always been a challenge to store the WordNet data. Some WordNets are stored using file system and some WordNets are s...