This paper presents a method for solving the collection fusion problem in hypermedia digital libraries. The proposition which is explored and evaluated is that across document links between hypermedia documents residi...
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This paper presents a method for solving the collection fusion problem in hypermedia digital libraries. The proposition which is explored and evaluated is that across document links between hypermedia documents residing in distributed hypermedia collections can supply sufficient useful information to allow effective collection fusion. In contrast to other collection fusion strategies, the link-based fusion strategy does not require a learning phase before it can be utilised and, also does not use any information from remote collections other than the returned list of documents. Because of these characteristics the proposed fusion strategy is suitable for very large and extremely dynamic environments in which other collection fusion strategies (e.g. learning collection fusion strategies) may be inapplicable, Evaluation of the link-based fusion strategy demonstrates that the proposed strategy is more effective and efficient than the uniform strategy which can be applied under the same conditions. (C) 1999 Elsevier Science Ltd. All rights reserved.
The World Wide Web (W3) has the potential to link different kinds of documents into hypertext collections and to distribute such collections among many document servers. distributed collections can bring forth new W3 ...
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The World Wide Web (W3) has the potential to link different kinds of documents into hypertext collections and to distribute such collections among many document servers. distributed collections can bring forth new W3 applications in extranets and expand the concept of content reuse. However, they also bring new authorization problems, such as the need for coordinated user administration, user authentication, and revocation of rights. This paper proposes WDAI, a simple and general infrastructure for distributed authorization on the World Wide Web. Under WDAI, browsers and servers exchange authorization information using X.509v3-based authorization certificates. WDAI is designed to be open to a wide variety of security policies and, being compatible with existing W3 technology, can be implemented without modifying existing browsers. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
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