3 research outputs found
Recommended from our members
Towards More Graceful Interaction: A Survey of Question-Answering Programs
One of the aims of Natural Language Processing (NLP) is to facilitate the use of computers by allowing users to interact with systems in natural language. Since such interactions often take the form of question-answering sessions, the process of question-answering is an important part of NLP. In this paper, we are concerned with the progress made towards building question-answering systems which are natural and satisfying to users, allowing them to express themselves freely and answering questions appropriately. Such systems are said to provide graceful interaction. We survey the evolution of question-answering programs, presenting steps and approaches that have been taken towards providing graceful man-machine interaction, and pointing out efficiencies of existing programs and theories. Our emphasis is on the various issues and difficulties encountered in building a user-friendly question-answering program
Data bases and data base systems related to NASA's aerospace program. A bibliography with indexes
This bibliography lists 1778 reports, articles, and other documents introduced into the NASA scientific and technical information system, 1975 through 1980
A portable natural language interface from Arabic to SQL.
In recent years, natural language interface systems have been built based on
the Front End and the Back End architecture which gives a guarantee of modularity
and portability to the system as a whole. An Arabic Front End has
been built that takes an input sentence, producing syntactic and semantic representations,
which it maps into First Order Logic. Expressing the meaning
of the user's question in terms of high level world concepts makes the natural
language interface independent of the database structure. It is then easier to
port the interface Front End to a database for a different domain.
The syntactic treatments are based on Generalised Phrase Structure Grammar
(GPSG) whereas the semantics are expressed in formal semantics theory. The
focus is mainly to provide syntactic and semantic analyses for Arabic queries
based on correct Arabic linguistic principles. The proposed treatments are
proved and tested by building a prototype system. The prototype is implemented
using one of the existing systems called Squirrel.
An Arabic morphological analyser is also proposed and implemented to distinguish
between two types of morphemes: internal morphemes which are a part
of the word's pattern, and external morphemes which are independent words
attached to the word but which are not part of the word's pattern. So, the
system focuses on the extraction of morphemes from the various inflexions or
forms of any Arabic word