-
Joy, F.; Murray, R.: ¬The World-Wide Web and Z39.50 : which way for libraries? (1995)
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- Abstract
- The function of the W3, like that of Z39.50, is to offer access to networked information, and they appear to have similar client/server architectures. However, libraries need both because of the W3's lack of support for the advanced search, retrieval and management facilities that are expected of modern OPACs and are offered by Z39.50. Current research is involved in developing hybrid W3/Z39.50 services
-
Scheuerer, J.: Onlinebanking (1997)
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- Abstract
- Komfort ist Trumpf beim neuen Banking-Modul von T-Online: einfachste Installation und Bedienung machen die elektronische Kontoführung mit T-Online zum Vergnügen
- Source
- Com!. 1997, H.8, S.22-24
-
Petry, W.; Werner, H.-J.: Anwendertraum: Kommunikations- und Retrieval-Software im Vergleich (1993)
0.01
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- Source
- Cogito. 9(1993) H.2, S.18-22
-
Ferl, T.E.; Millsap, L.: Remote use of the University of California MELVYL Library System : an online survey (1992)
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- Abstract
- This report presents the results of a survey of users who access the University of California's online union catalog, the MELVYL library system, via microcomputers with modems or connections carried through local or wide area networks. The report includes descriptive statistics on user location, status, subject interest, affiliation, in-library versus out-of-library usage patterns, need for assistance, and desire for new features
- Source
- Information technology and libraries. 11(1992) no.3, S.285-303
-
Lynch, C.: ¬The Z39.50 information retrieval protocol : an overview and status report (1991)
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-
Corey, J.F.: ¬A grant for Z39.50 (1994)
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- Abstract
- In Sept. 1990, the US Dept. of Education's Library Technology and Cooperation Grants Program awarded a three-year grant to the Florida Center for Library Automation (FCLA), an agency of the Florida State University System, to develop software adhering to the ANSI Z39.50 Information Retrieval protocol standard. The Z39.50 software was to operate over the OSI communications protocols and be integrated with FCLA's NOTIS system, which is shared by all 9 state universities in Florida. In order to test the correctness of its Z39.50 software, FCLA sought out other library software developers who would be willing to develop Z39.50 systems of their own. As part of this process, FCLA helped to found the Z39.50 Implementor's Group (ZIG), which has since gone on to improve the standard and promote Z39.50 implementations throughout much of the North American library systems marketplace. Early on in the project, it became apparent that TCP/IP would be a more heavily used communication vehicle for Z39.50 messages than OSI. FCLA expanded its design to include TCP/IP and, by the end of the grant in Sept. 1993, will have a working Z39.50 system that can communicate over both OSI and TCP/IP networks
-
Lynch, C.A.: ¬The Z39.50 information retrieval standard : part I: a strategic view of its past, present and future (1997)
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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.
This paper, which will appear in two parts, starting with this issue of D-Lib, looks at several strategic issues surrounding Z39.50. After a relatively brief overview of the function and history of the protocol, I will examine some of the competing visions of the protocol's role, with emphasis on issues of interoperability and the incorporation of semantics. The second installment of the paper will look at questions related to the management of the standard and the standards development process, with emphasis on the scope of the protocol and how that relates back again to interoperability questions. The paper concludes with a discussion of the adoption and deployment of the standard, its relationship to other standards, and some speculations on future directions for the protocol. This paper is not intended to be a tutorial on the details of how current or past versions of Z39.50 work. These technical details are covered not only in the standard itself (which can admittedly be rather difficult reading) but also in an array of tutorial and review papers (see <http://lcweb.loc.gov/z3950/agency> for bibliographies and pointers to on-line information on Z39.50). Instead, the paper's focus is on how and why Z39.50 developed the way it did, and the conceptual debates that have influenced its evolution and use. While a detailed technical knowledge of the operation of Z39.50 is certainly helpful, it should not be necessary in order to follow most of the material here. Some disclaimers are in order. I have been actively involved in the development of Z39.50 since the early 1980s and have been a participant -- and on occasion, even an instigator -- of some of the activities described here. This paper is an attempt to make a critical assessment of the current state of Z39.50 and a review of its development with the full benefit of hindsight. It recounts a number of debates that occurred within the developer community over the past years. In many of these, I advocated specific positions or approaches, sometimes successfully and sometimes unsuccessfully. What is presented here is one person's perspective - mine --, which is sometimes at odds with the current consensus with the developer community; I've tried to represent opposing views fairly, and to differentiate my opinions from fact or consensus. However, others will undoubtedly disagree with many of the comments here.
-
Werner, H.-J.: ¬Die Werkzeuge liegen bereit : Infoface - eine neue Benutzeroberfläche oder ein neues Retrieval-Software-Konzept? (1993)
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-
Sloan, B.G.: Remote access : design implications for the online catalog (1991)
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- Date
- 8. 1.2007 17:22:42
- Footnote
- Simultaneously published as Enhancing Access to Information: Designing Catalogs for the 21st Century
-
Lazinger, S.S.; Peritz, B.C.: Reader use of a nationwide research library network : local OPAC vs. remote files (1991)
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- Date
- 22. 2.1999 13:06:18
- Source
- Information technology and libraries. 10(1991), S.192-200
-
Lewontin, A.: Intracampus sharing of online resources by end users (1991)
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- Abstract
- Describes the cooperative efforts of computer centre staff and library staff at Bentley College, Massachusetts, to create end user interfaces to enable the locally loaded data bases on the on-line catalogue to be searched off-campus by remote users as well as by library users on campus. Describes the success obtained using 2 data bases: LEXIS and Dow Jones News Retrieval Service
-
Gottswinter, E.; Mönnich, M.W.: Brücken bauen zwischen EDV-Systemen : Einführung in die SR-Normen (1994)
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- Abstract
- Explains the basic principles of the ISO Search and Retrieve (SR) standard which facilitates the searching and retrieval of data from computers via electronic networks regardless of the hardware and software used. Provides an introduction to SR and addresses the parameters of SR servies. Abstract Syntax Notation 1 and the preliminary implementation of an SR Update Service in the KARIN cataloguing system
-
Petry, W.: Datenreisen billiger : wie man Telekommunikationskosten sparen kann (1994)
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- Source
- Cogito. 10(1994) H.4, S.17-22
-
Stovel, L.; Fuchs, R.; Chang, J.-W.: RLG's Z39.50 server : development and implementation issues (1993)
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- Source
- Information technology and libraries. 12(1993) no.2, S.227-230
-
Carson, S.M.; Freivalds, D.I.: Z39.50 and LIAS : Penn State's experience (1993)
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- Source
- Information technology and libraries. 12(1993) no.2, S.230-237
-
Snelson, P.: Relationships between access and use in information systems : remote access to and browsing of online catalogues (1993)
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- Abstract
- Examined two groups of online catalogue users segregated by their method of access to the system: terminals in the library or remote workstations. An online survey collected demographic data, perceptions on source and terminal accessibility, and information on usage, task variety and search satisfaction. Transaction logs furnished data on browsing behavious, while interviews of both groups provided additional information about remote use. Results indicate that remote use is comparable to traditional use
- Imprint
- Medford, NJ : Learned Information
- Source
- Integrating technologies - converging professions: proceedings of the 56th Annual Meeting of the American Society for Information Science, Columbus, OH, 24-28 October 1993. Ed.: S. Bonzi
-
Löns, K.: Datenkommunikation (1990)
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- Source
- Grundlagen der praktischen Information und Dokumentation: ein Handbuch zur Einführung in die fachliche Informationsarbeit. 3. Aufl. Hrsg.: M. Buder u.a. Bd.2
-
Löns, K.: Kommunikationsnetze und Datenkommunikation (1997)
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- Source
- Grundlagen der praktischen Information und Dokumentation: ein Handbuch zur Einführung in die fachliche Informationsarbeit. 4. Aufl. Hrsg.: M. Buder u.a
-
Cerf, V.G.: Netztechnik (1995)
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- Pages
- S.22-31
-
Duhm, U.: Ring frei zur nächsten Runde (1999)
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- Date
- 19. 2.1999 20:21:22
