-
Hakala, J.: Z39.50-1995: information retrieval protocol : an introduction to the standard and it's usage (1996)
0.01
0.0064842156 = product of:
0.019452646 = sum of:
0.019452646 = product of:
0.058357935 = sum of:
0.058357935 = weight(_text_:retrieval in 3340) [ClassicSimilarity], result of:
0.058357935 = score(doc=3340,freq=4.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.37811437 = fieldWeight in 3340, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=3340)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- This article describes the Internet information retrieval protocol, Z39.50, and it's usage. The services of Z39.50 are depicted, as are some important terms related to the standard. A description of the OPAC Network in Europe (ONE), an important Z39.50 implementation project is included
-
Lunau, C.D.: Z39.50: a critical component of the Canadian resource sharing infrastructure : implementation activities and results achieved (1997)
0.01
0.006144777 = product of:
0.01843433 = sum of:
0.01843433 = product of:
0.055302992 = sum of:
0.055302992 = weight(_text_:22 in 3193) [ClassicSimilarity], result of:
0.055302992 = score(doc=3193,freq=2.0), product of:
0.17867287 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051022716 = queryNorm
0.30952093 = fieldWeight in 3193, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=3193)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Date
- 3. 3.1999 17:22:57
-
Burrows, T.: ¬The virtual catalogue : bibliographic access for the virtual library (1993)
0.01
0.006144777 = product of:
0.01843433 = sum of:
0.01843433 = product of:
0.055302992 = sum of:
0.055302992 = weight(_text_:22 in 5286) [ClassicSimilarity], result of:
0.055302992 = score(doc=5286,freq=2.0), product of:
0.17867287 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051022716 = queryNorm
0.30952093 = fieldWeight in 5286, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=5286)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Date
- 8.10.2000 14:47:22
-
Fang, L.: ¬A developing search service : heterogeneous resources integration and retrieval system (2004)
0.01
0.005731291 = product of:
0.017193872 = sum of:
0.017193872 = product of:
0.051581617 = sum of:
0.051581617 = weight(_text_:retrieval in 1193) [ClassicSimilarity], result of:
0.051581617 = score(doc=1193,freq=8.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.33420905 = fieldWeight in 1193, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=1193)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- This article describes two approaches for searching heterogeneous resources, which are explained as they are used in two corresponding existing systems-RIRS (Resource Integration Retrieval System) and HRUSP (Heterogeneous Resource Union Search Platform). On analyzing the existing systems, a possible framework-the MUSP (Multimetadata-Based Union Search Platform) is presented. Libraries now face a dilemma. On one hand, libraries subscribe to many types of database retrieval systems that are produced by various providers. The libraries build their data and information systems independently. This results in highly heterogeneous and distributed systems at the technical level (e.g., different operating systems and user interfaces) and at the conceptual level (e.g., the same objects are named using different terms). On the other hand, end users want to access all these heterogeneous data via a union interface, without having to know the structure of each information system or the different retrieval methods used by the systems. Libraries must achieve a harmony between information providers and users. In order to bridge the gap between the service providers and the users, it would seem that all source databases would need to be rebuilt according to a uniform data structure and query language, but this seems impossible. Fortunately, however, libraries and information and technology providers are now making an effort to find a middle course that meets the requirements of both data providers and users. They are doing this through resource integration.
-
Friedrich, M.; Schimkat, R.-D.; Küchlin, W.: Information retrieval in distributed environments based on context-aware, proactive documents (2002)
0.01
0.005673688 = product of:
0.017021064 = sum of:
0.017021064 = product of:
0.05106319 = sum of:
0.05106319 = weight(_text_:retrieval in 3608) [ClassicSimilarity], result of:
0.05106319 = score(doc=3608,freq=4.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.33085006 = fieldWeight in 3608, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=3608)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- In this position paper we propose a document-centric middleware component called Living Documents to support context-aware information retrieval in distributed communities. A Living Document acts as a micro server for a document which contains computational services, a semi-structured knowledge repository to uniformly store and access context-related information, and finally the document's digital content. Our initial prototype of Living Documents is based an the concept of mobile agents and implemented in Java and XML.
-
Veen, T. van; Oldroyd, B.: Search and retrieval in The European Library : a new approach (2004)
0.00
0.0049634436 = product of:
0.014890331 = sum of:
0.014890331 = product of:
0.04467099 = sum of:
0.04467099 = weight(_text_:retrieval in 1164) [ClassicSimilarity], result of:
0.04467099 = score(doc=1164,freq=6.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.28943354 = fieldWeight in 1164, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=1164)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- The objective of the European Library (TEL) project [TEL] was to set up a co-operative framework and specify a system for integrated access to the major collections of the European national libraries. This has been achieved by successfully applying a new approach for search and retrieval via URLs (SRU) [ZiNG] combined with a new metadata paradigm. One aim of the TEL approach is to have a low barrier of entry into TEL, and this has driven our choice for the technical solution described here. The solution comprises portal and client functionality running completely in the browser, resulting in a low implementation barrier and maximum scalability, as well as giving users control over the search interface and what collections to search. In this article we will describe, step by step, the development of both the search and retrieval architecture and the metadata infrastructure in the European Library project. We will show that SRU is a good alternative to the Z39.50 protocol and can be implemented without losing investments in current Z39.50 implementations. The metadata model being used by TEL is a Dublin Core Application Profile, and we have taken into account that functional requirements will change over time and therefore the metadata model will need to be able to evolve in a controlled way. We make this possible by means of a central metadata registry containing all characteristics of the metadata in TEL. Finally, we provide two scenarios to show how the TEL concept can be developed and extended, with applications capable of increasing their functionality by "learning" new metadata or protocol options.
-
Lopatenko, A.; Asserson, A.; Jeffery, K.G.: CERIF - Information retrieval of research information in a distributed heterogeneous environment (2002)
0.00
0.0048631616 = product of:
0.014589485 = sum of:
0.014589485 = product of:
0.043768454 = sum of:
0.043768454 = weight(_text_:retrieval in 3597) [ClassicSimilarity], result of:
0.043768454 = score(doc=3597,freq=4.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.2835858 = fieldWeight in 3597, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=3597)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- User demands to have access to complete and actual information about research may require integration of data from different CRISs. CRISs are rarely homogenous systems and problems of CRISs integration must be addressed from technological point of view. Implementation of CRIS providing access to heterogeneous data distributed among a number of CRISs is described. A few technologies - distributed databases, web services, semantic web are used for distributed CRIS to address different user requirements. Distributed databases serve to implement very efficient integration of homogenous systems, web services - to provide open access to research information, semantic web - to solve problems of integration semantically and structurally heterogeneous data sources and provide intelligent data retrieval interfaces. The problems of data completeness in distributed systems are addressed and CRIS-adequate solution for data completeness is suggested.
-
Nicholson, D.; Wake, S.: HILT: subject retrieval in a distributed environment (2003)
0.00
0.0048631616 = product of:
0.014589485 = sum of:
0.014589485 = product of:
0.043768454 = sum of:
0.043768454 = weight(_text_:retrieval in 3810) [ClassicSimilarity], result of:
0.043768454 = score(doc=3810,freq=4.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.2835858 = fieldWeight in 3810, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=3810)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Source
- Subject retrieval in a networked environment: Proceedings of the IFLA Satellite Meeting held in Dublin, OH, 14-16 August 2001 and sponsored by the IFLA Classification and Indexing Section, the IFLA Information Technology Section and OCLC. Ed.: I.C. McIlwaine
-
Hellweg, H.; Krause, J.; Mandl, T.; Marx, J.; Müller, M.N.O.; Mutschke, P.; Strötgen, R.: Treatment of semantic heterogeneity in information retrieval (2001)
0.00
0.004585033 = product of:
0.013755098 = sum of:
0.013755098 = product of:
0.041265294 = sum of:
0.041265294 = weight(_text_:retrieval in 6560) [ClassicSimilarity], result of:
0.041265294 = score(doc=6560,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.26736724 = fieldWeight in 6560, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=6560)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
-
Severiens, T.; Hohlfeld, M.; Zimmermann, K.; Hilf, E.R.: PhysDoc - a distributed network of physics institutions documents : collecting, indexing, and searching high quality documents by using harvest (2000)
0.00
0.0040794373 = product of:
0.012238312 = sum of:
0.012238312 = product of:
0.036714934 = sum of:
0.036714934 = weight(_text_:online in 6470) [ClassicSimilarity], result of:
0.036714934 = score(doc=6470,freq=4.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.23710167 = fieldWeight in 6470, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0390625 = fieldNorm(doc=6470)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- PhysNet offers online services that enable a physicist to keep in touch with the worldwide physics community and to receive all information he or she may need. In addition to being of great value to physicists, these services are practical examples of the use of modern methods of digital libraries, in particular the use of metadata harvesting. One service is PhysDoc. This consists of a Harvest-based online information broker- and gatherer-network, which harvests information from the local web-servers of professional physics institutions worldwide (mostly in Europe and USA so far). PhysDoc focuses on scientific information posted by the individual scientist at his local server, such as documents, publications, reports, publication lists, and lists of links to documents. All rights are reserved for the authors who are responsible for the content and quality of their documents. PhysDis is an analogous service but specifically for university theses, with their dual requirements of examination work and publication. The strategy is to select high quality sites containing metadata. We report here on the present status of PhysNet, our experience in operating it, and the development of its usage. To continuously involve authors, research groups, and national societies is considered crucial for a future stable service.
-
Ghiselli, C.; Padula, M.: ¬A unified access to extract knowledge from heterogeneous Web archives (2001)
0.00
0.004038437 = product of:
0.01211531 = sum of:
0.01211531 = product of:
0.03634593 = sum of:
0.03634593 = weight(_text_:online in 2290) [ClassicSimilarity], result of:
0.03634593 = score(doc=2290,freq=2.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.23471867 = fieldWeight in 2290, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0546875 = fieldNorm(doc=2290)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Source
- Online information review. 25(2001) no.5, S.299-310
-
Stark, T.: ¬The Net and Z39.50 : toward a virtual union catalog (1997)
0.00
0.004011904 = product of:
0.012035711 = sum of:
0.012035711 = product of:
0.03610713 = sum of:
0.03610713 = weight(_text_:retrieval in 3194) [ClassicSimilarity], result of:
0.03610713 = score(doc=3194,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.23394634 = fieldWeight in 3194, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=3194)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- The State Library of Iowa, USA, received a Higher Education Act title II grant from the US Dept. of Education in 1994 to create a demonstration project of new library information technologies. Describes 2 interlinked components of the project: Web-based union catalogue development and statewide deployment of the ANSI/NISO Z39.50 standard for database search and retrieval. Z39.50 was chosen because of its ability to searching multiple remote databases in a single session and its common interface across a variety of implementations. Use of a distributed Z39.50 search makes the need for maintaining large union catalogues unnecessary
-
Woldering, B.: 2nd European Library Seminar / 3rd Gabriel Workshop (2003)
0.00
0.0034615172 = product of:
0.010384551 = sum of:
0.010384551 = product of:
0.031153653 = sum of:
0.031153653 = weight(_text_:online in 2132) [ClassicSimilarity], result of:
0.031153653 = score(doc=2132,freq=2.0), product of:
0.1548489 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.051022716 = queryNorm
0.20118743 = fieldWeight in 2132, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.046875 = fieldNorm(doc=2132)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- From 4 to 6 June 2003 the 2nd European Library Seminar / 3rd Gabriel Workshop was held at the Biblioteca Nacional in Lisbon, Portugal. 62 librarians and webmasters from 20 countries participated in the workshop, mainly Gabriel contacts but also quite a number of librarians from Portugal. Since its foundation in 1995 Gabriel, the world wide web service of the European national libraries, has established itself as the official network service of the Conference of European National Librarians (CENL) and has undergone a continuous development. The Gabriel website has been redesigned and restructured, and it was relaunched in summer 2002. At present, 41 libraries from 39 European countries are represented in Gabriel. Gabriel offers access to varied information sources and numerous online-catalogues and Services of the European national libraries. Gabriel is the only trans-European library service.
-
Lynch, C.A.: Building the infrastructure of resource sharing : union catalogs, distributed search, and cross database linkage (1997)
0.00
0.0034387745 = product of:
0.0103163235 = sum of:
0.0103163235 = product of:
0.03094897 = sum of:
0.03094897 = weight(_text_:retrieval in 1506) [ClassicSimilarity], result of:
0.03094897 = score(doc=1506,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.20052543 = fieldWeight in 1506, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=1506)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- Effective resourcesharing presupposes an infrastructure which permits users to locate materials of interest in both print and electronic formats. 2 approaches for providing this are union catalogues and Z39.50 based distributed search systems and computer to computer information retrieval protocols. The advantages and limitations of each approach are considered, paying particular attention to a relaistic assessment of Z39.50 implementations. Argues that the union catalogue is far from obsolete and the 2 approaches should be considered complementary rather than competitive. Technologies to create links between the bibliographic apparatus of catalogues and abstracting and indexing databases and primary content in electronic form, such as the new Serial Item and Contribution Identifier (SICI) standard are also discussed as key elements in the infrastructure to support resource sharing
-
Park, S.: Usability, user preferences, effectiveness, and user behaviors when searching individual and integrated full-text databases : implications for digital libraries (2000)
0.00
0.0028656456 = product of:
0.008596936 = sum of:
0.008596936 = product of:
0.025790809 = sum of:
0.025790809 = weight(_text_:retrieval in 4591) [ClassicSimilarity], result of:
0.025790809 = score(doc=4591,freq=2.0), product of:
0.15433937 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.051022716 = queryNorm
0.16710453 = fieldWeight in 4591, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0390625 = fieldNorm(doc=4591)
0.33333334 = coord(1/3)
0.33333334 = coord(1/3)
- Abstract
- This article addresses a crucial issue in the digital library environment: how to support effective interaction of users with heterogeneous and distributed information resources. In particular, this study compared usability, user preference, effectiveness, and searching behaviors in systems that implement interaction with multiple databases as if they were one (integrated interaction) in a experiment in the TREC environment. 28 volunteers were recruited from the graduate students of the School of Communication, Information & Library Studies at Rutgers University. Significantly more subjects preferred the common interface to the integrated interface, mainly because they could have more control over database selection. Subjects were also more satisfied with the results from the common interface, and performed better with the common interface than with the integrated interface. Overall, it appears that for this population, interacting with databases through a common interface is preferable on all grounds to interacting with databases through an integrated interface. These results suggest that: (1) the general assumption of the information retrieval (IR) literature that an integrated interaction is best needs to be revisited; (2) it is important to allow for more user control in the distributed environment; (3) for digital library purposes, it is important to characterize different databases to support user choice for integration; and (4) certain users prefer control over database selection while still opting for results to be merged
