Content-based information searching on the Internet. Part 1.

Abstract

The search services on the Internet far surpass the possibilities offered by remote online services both in their flexibility, user-friendly interfaces and in the information offered. Ali of this is a challenge to information retrieval and classification, which are looking ahead to their most significant develop-ment in their hístory with the appearance of the Internet. Eversince the beginning, search services are characterised by the same duality as all of the traditional content-based searching and ordering systems: robot generated WWW indices (indexing services, „search engines") based on natural languages and sometimes using standardised vocabularies (thesauri) as well as Internet catalogues (browsing services) employing hierarchical classification systems have ali been developed. Attempt is made to synchronise their freshly förmed temni-nology with that of documentation and library sciences. In the first part the author deals with the indexing services, in the second with the Internet catalogues, and finally he briefly considers the formats of the primary and secondary (metadata) electronic documents.