1. DIGITAL LIBRARY Digital library provides not only access to original source material, contextualization & commentaries, but also it provides a set of invaluable additional resources and service. Digital libraries are more organized and structured than web- an instance of a shared worldwide collection of information. Digital library allows users to engage in a host of activities that had never been before. WHY ETHICS NEEDED FOR DIGITAL LIBRARY Traditional libraries do their functions (service to a clientele, stewardship over collection, sustainability and ILL service) with upholding ethical traditions (including free speech, privacy & equal access). At present DL appears as critical to humanities as traditional library was to scholarship in previous centuries. The digital collections what we build will not be a digital library until they incorporate a significant number of these services and ethical traditions. IMPOTANCE OF STANDARDS In moving from dispersed digital collections to achieve real interoperability (open archives), digital library developers need creation & adoption of wide variety of standards including metadata, ways of making those metadata visible to external systems (harvesting), and common architectures which will support interoperability (user-centered architecture) [1]. METADATA Metadata is simply defined as ‘data about data’ or ‘information about information’. As research and applications evolved, metadata has been refined to “structured information that describes, explains, locates or otherwise makes it easier to retrieve, use or manage an information resource” (NISO,2004: 1). DCMI defines metadata as “data associated with either an information system or an information object for purpose of description, administration, legal requirements, technical functionality, use and usage and preservation [1]. METADATA CAN PERFORM  Describing what resources are and what they are about and organizing those resources according to controllable criteria.  Allowing resources to be found by relevant criteria, aggregating similar resources and providing pathways to the location of the desired information.  Facilitating metadata exchange and enabling interoperability.  Providing digital identification and description for archiving and the preservation resources (NISO, 2004) METADATA : HISTORICAL OUTLOOK During middle of 1990s when internet became a ‘household’ word for libraries and institutions, that time metadata development took place to manage and use large amounts of digital information on a daily basis. Like scientific, humanities and social science communities, library community also took action to develop metadata standards as a solution to resource description and discovery problems. OCLC initiated a project in 1994 to experiment with cataloguing Web resources through AACR2 & MARC format. In 1995, Dublin Core was born and emerged from metadata workshop at Dublin, Ohio [1]. ELEMENT / SCHEME Metadata standards have been developed by different communities and subject domains. A key component in these standards is the element set (more appropriately, the scheme) that defines the structure & semantics of elements. For example, the international standard Dublin Core Metadata Element Set (DCMES) defines 15 core elements that should be used to describe distributed information resources on the internet discovery purpose. NETWORK OF DIGITAL LIBRARIES - DIAGRAM NOTION OF SPACE Notion of space as a key ethical aspect of digital libraries. This idea is very different from the public spaces in people’s lives and particularly from the public spaces we mean libraries. Cyberspace is not a kind of space as the Cartesian view would suggest. The interface is just another part of the tools of our everyday life. Through it cyberspace becomes a part of our life-space. The ethical problems of cyberspace and consequently, the ethical problems of digital libraries concern the question of how to create a culture of sharing and preserving knowledge in digital form [2]. The use of cyberspace is strongly related to several ethical issues pertaining to the users. This also applies to the digital libraries as well. Several authors put their works partly or totally for free downloading. The target group is often non- profit oriented users like academicians, etc. Sometimes there is a limit mentioned to the downloading, although there may not be any restriction imposed by the technology. It should not be transgressed - is one of the ethical principles the users should maintain. This is an instance; there are many others like this. An ethical culture regarding the use of digital libraries is absolutely necessary for the smooth and effective functionality of the digital libraries. CONCLUSION Digital libraries should perform services like collection of resource according to need, retrieving information, managing and sharing information, etc. Each service has technical as well as ethical basis. DLs should be designed so that user information needs are met. And here lies the question that concerns the gap between information rich and information poor at a global and local level. The question of equality of access due to various reasons (economic, political, cultural, fair use, etc.) and preservation and transmission of knowledge for future generations are major ethical and legal issues for digital libraries. REFERENCES 1.Susan Schreibman et al., eds., A Companion to Digital Humanities (Pt.IV, 36. The past, present, and future of digital libraries by Howard Besser),(Blackwell: 2008) 2.T. Aparac et al., eds., Third International Conference on Conceptions of Library and Information Science (CoLIS 3):Digital Libraries :Interdisciplinary Concepts, Challenges and Opportunities. Dubrovnik, Croatia, May 23-26, 1999, (Zagreb: Lokve, 1999) p.39-53; http://www.capurro.de/diglib.htm DIGITAL LIBRARY– SERVICE MODEL USERS SERVICES TOOLS OBJECTS INSTANTIATION OF METADATA The document information displayed in the search result pages is typical instantiation of metadata. Metadata describes what a document is, what it is about and where one may locate it. If we search ‘Impact Factor’ in internet, first screen will be looked like below: DUBLIN CORE 15 ELEMENTS SEEN FROM THREE CATAGORIES DUBLIN CORE CONTENT INTELLECTUAL PROPERTY INSTANTIATION  TITLE CREATOR DATE  DESCRIPTION PUBLISHER FORMAT  TYPE RIGHTS IDENTIFIER  SUBJECT CONTRIBUTOR LANGUAGE  SOURCE  RELATION  COVERAGE METADATA PHILOSOPHIES AND HARVESTING : MARC vs. Warwick A set of architectures and a common approach is needed to make metadata available to other collections, middleware and end user so that interoperability takes place properly. There are two approaches- MARC/AACR2 and Dublin Core Community approach (based upon Warwick framework). According to MARC/AACR2 philosophy, all user needs for all types of works should be fulfilled under one big schema. Whereas philosophy of Dublin Core community relies upon interlocking containers and packages of metadata, each maintained by a particular community. Each community can support the packages of metadata it needs for its own particular uses, while still interoperating with metadata packages from other communities. Under this philosophy, the Dublin Core serves as unifying set of metadata to allow discovery across all communities [1]. USER INTERFACE User interface (UI) design focuses on anticipating what users might need to do and ensuring that the interface has elements that are easy to access, understand and use to facilitate those actions. UI brings together concepts from interaction design, visual design and information architecture. The interface is just another part of the tools of our everyday life. There are millions of places on the net and there are hundreds of digital libraries, but their common place is the interface i.e. the place where we eliminate the distance from our life-world.