  A large amount of data is present on the web. It contains huge number of web
pages and to find suitable information from them is very cumbersome task. There
is need to organize data in formal manner so that user can easily access and
use them. To retrieve information from documents, we have many Information
Retrieval (IR) techniques. Current IR techniques are not so advanced that they
can be able to exploit semantic knowledge within documents and give precise
results. IR technology is major factor responsible for handling annotations in
Semantic Web (SW) languages and in the present paper knowledgeable
representation languages used for retrieving information are discussed.
