- The huge amount of information that the networking revolution has made available, is often distributed into many organizations usually organized by subject. When the users want to access it, normally they have to visit many web sites on the Internet, and to use different interfaces. Additionally, the regular update of this information makes the obvious methods of harvesting and centralized provision of it, practically invalid.
The usage of portals allows to have gates to big amount of qualitative information, allowing the user to start from only one web site and to subsequently find whatever he is looking for, mostly following links by subject or links that depend on the origin of the information, before using a final retrieval system. This is often adequate for the non
specialized user. But the possibility of searching the information, using a unique and
powerful interface, which is usually the choice of the professional and regular user, is not
These limitations often come from the adoption of different (and incompatible) ways (or even standards) in the description of the information and access software -interfaces to it, from the different information sources, and are often due to the different goals of the organization or the peculiarity of the information. The adoption of common standards, which would be the ideal solution, is not applicable in large scale.
Even with the usage of international and commonly used protocols, such as the Z39.50, because of the different implementation levels, and also of the different, standard or not, structure schemes (such as UNIMARC, MARC21, MODS, Dublin Core, etc) and character set encodings (such as UNICODE, ELOT928, ANSEL, etc) of the supplied information, the merging of the provided information is not trivial.
In this work we describe how the modern technological progress can help the creation of a uniform interface, and to create a Digital Library, with its material distributed to the source organizations, and its description metadata either distributed or centralized, according to the occasion, so that to enable a uniform interface to its material, to the material that we select to include and index.
We analyze how this can be achieved with the usage of a variety of methods, in the general area of the Digital Libraries, such as wrappers and the Open Archive Initiative, on the searching of information over the Web, or through protocols such as the Z39.50.
- Καπιδάκης, Σαράντος
- Σφακάκης, Μιχάλης
- Conference Paper