Introduction
Digital libraries have become more prevalent in the library and information science fields. They provide access
to digital services in a coherent and economical manner to geographically distributed library patrons. The digital
services include desktops, online database, electronic publishing (e-publishing), electronic journal (e-journal),
electronic books (e-books), web-portal etc. An advantage of the digital libraries over the conventional libraries is
that the former has the potential to store much more information with extremely little or no physical space.
Increased accessibility as well as availability to none traditional constituencies of a library for reasons such as
geographic location or organizational affiliation is another important advantage of the digital libraries over the