06-06-2012, 05:03 PM
DOMAIN DIMENTIONAL INFORMATION RETRIEVAL SYSTEM
INFORMATION RETRIEVAL SYSTEM.ppt (Size: 1.67 MB / Downloads: 1)
INTRODUCTION
Search engines are the most commonly used type of tool for finding relevant information on the Internet.
However, today’s search engines are far from perfect. Typical search queries are short, often one or two words, and can be ambiguous therefore returning inappropriate results.
What is domain and dimension?
A precise search engine adapted to professional environments which are characterized by a domain (e.g. medicine, law, sport, and so on).
In our approach, each domain has its own terminology (i.e. a set of terms that denote its concepts: team, player, etc.) and it is organized along dimensions, such as person, location, etc.
The dimensions are made of concepts and semantic relationships that represent a particular perspective or point of view on the domain.
INFORMATION RETRIEVAL SYSTEM
Information Retrieval Systems (IRS) are nowadays very popular, mainly due to the popularity of the Web.
Most IRS on the Web (also called search engines) are not really domain-oriented. once the document domain is known, certain assumptions can be made and specific knowledge can be used.
Users are then allowed to utilize much more precise queries than the usual small set of keywords in use for Web search engines.
In professional environments, IRS should be able to process precise queries, mostly due to its use of a specific terminology, but also because the retrieved information is meant to be part of a user task (diagnose a disease, write a report, etc.).