Search (6 results, page 1 of 1)

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Theme

Verteilte bibliographische Datenbanken

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Theme

Internet

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Abstract

A great deal of attention has been paid to computer to computer cammunications protocols for transferring information, such as Z39.50 Information retrieval protocol or various networked database approaches. Argues that it will be necessary to move beyond this type of technical mechanism and address deeper questions of information semantics to provide a basis for the future complex ecology of networked information and intelligent software. Otherwise, these advanced communication protocols will only permit traditional online searching over the Internet, perhaps improved by the availability of common user interfaces to collections of similar resources. They will not deliver the full promise of networked information

Theme

Internet

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Source

Electronic networking: research, applications, and policy. 2(1992) no.1, S.10-22

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Abstract

The Internet forms a new medium for communication and the distribution of information. Examines roles for libraries in the new environment in light of the history of mass media broadcasters and their relationship with advertisers, and sponsors. Draws conclusions about legal and economic changes brought about by networking: the breakdown of the interlibrary loan system for access to networked resources, costs of electronic information and attemps to market information directly to consumers

Theme

Internet

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Abstract

The Z39.50 standard for information retrieval is important from a number of perspectives. While still not widely known within the computer networking community, it is a mature standard that represents the culmination of two decades of thinking and debate about how information retrieval functions can be modeled, standardized, and implemented in a distributed systems environment. And - importantly -- it has been tested through substantial deployment experience. Z39.50 is one of the few examples we have to date of a protocol that actually goes beyond codifying mechanism and moves into the area of standardizing shared semantic knowledge. The extent to which this should be a goal of the protocol has been an ongoing source of controversy and tension within the developer community, and differing views on this issue can be seen both in the standard itself and the way that it is used in practice. Given the growing emphasis on issues such as "semantic interoperability" as part of the research agenda for digital libraries (see Clifford A. Lynch and Hector Garcia-Molina. Interoperability, Scaling, and the Digital Libraries Research Agenda, Report on the May 18-19, 1995 IITA Libraries Workshop, <http://www- diglib.stanford.edu/diglib/pub/reports/iita-dlw/main.html>), the insights gained by the Z39.50 community into the complex interactions among various definitions of semantics and interoperability are particularly relevant. The development process for the Z39.50 standard is also of interest in its own right. Its history, dating back to the 1970s, spans a period that saw the eclipse of formal standards-making agencies by groups such as the Internet Engineering Task Force (IETF) and informal standards development consortia. Moreover, in order to achieve meaningful implementation, Z39.50 had to move beyond its origins in the OSI debacle of the 1980s. Z39.50 has also been, to some extent, a victim of its own success -- or at least promise. Recent versions of the standard are highly extensible, and the consensus process of standards development has made it hospitable to an ever-growing set of new communities and requirements. As this process of extension has proceeded, it has become ever less clear what the appropriate scope and boundaries of the protocol should be, and what expectations one should have of practical interoperability among implementations of the standard. Z39.50 thus offers an excellent case study of the problems involved in managing the evolution of a standard over time. It may well offer useful lessons for the future of other standards such as HTTP and HTML, which seem to be facing some of the same issues.