Digital Library is emerging as a trend in the present era, the information society of today suffers not from the lack but from a surplus of information. Distinguishing relevant information from non-relevant information is one of the main tasks of Librarians. The development of information technology in the field of digital libraries has attracted many research efforts during the last years. Many interesting projects have been started, dealing with the various open issues arising in this field addressing the challenges such as metadata selection, preservation, technology obsolescence, and copyright issues, etc.