-
Shiri, A.: Digital library research : current developments and trends (2003)
0.03
0.026618127 = product of:
0.053236254 = sum of:
0.053236254 = product of:
0.10647251 = sum of:
0.10647251 = weight(_text_:headings in 1072) [ClassicSimilarity], result of:
0.10647251 = score(doc=1072,freq=2.0), product of:
0.24837378 = queryWeight, product of:
4.849944 = idf(docFreq=940, maxDocs=44218)
0.051211677 = queryNorm
0.42867854 = fieldWeight in 1072, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.849944 = idf(docFreq=940, maxDocs=44218)
0.0625 = fieldNorm(doc=1072)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This column gives an overview of current trends in digital library research under the following headings: digital library architecture, systems, tools and technologies; digital content and collections; metadata; interoperability; standards; knowledge organisation systems; users and usability; legal, organisational, economic, and social issues in digital libraries.
-
MacLeod, R.: Promoting a subject gateway : a case study from EEVL (Edinburgh Engineering Virtual Library) (2000)
0.02
0.024531214 = product of:
0.049062427 = sum of:
0.049062427 = product of:
0.098124854 = sum of:
0.098124854 = weight(_text_:22 in 4872) [ClassicSimilarity], result of:
0.098124854 = score(doc=4872,freq=4.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.54716086 = fieldWeight in 4872, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=4872)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:40:22
-
Subject gateways (2000)
0.02
0.024284663 = product of:
0.048569325 = sum of:
0.048569325 = product of:
0.09713865 = sum of:
0.09713865 = weight(_text_:22 in 6483) [ClassicSimilarity], result of:
0.09713865 = score(doc=6483,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.5416616 = fieldWeight in 6483, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=6483)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:43:01
-
Tudhope, D.; Binding, C.; Blocks, D.; Cunliffe, D.: Compound descriptors in context : a matching function for classifications and thesauri (2002)
0.02
0.023527324 = product of:
0.04705465 = sum of:
0.04705465 = product of:
0.0941093 = sum of:
0.0941093 = weight(_text_:headings in 3179) [ClassicSimilarity], result of:
0.0941093 = score(doc=3179,freq=4.0), product of:
0.24837378 = queryWeight, product of:
4.849944 = idf(docFreq=940, maxDocs=44218)
0.051211677 = queryNorm
0.3789019 = fieldWeight in 3179, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
4.849944 = idf(docFreq=940, maxDocs=44218)
0.0390625 = fieldNorm(doc=3179)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- There are many advantages for Digital Libraries in indexing with classifications or thesauri, but some current disincentive in the lack of flexible retrieval tools that deal with compound descriptors. This paper discusses a matching function for compound descriptors, or multi-concept subject headings, that does not rely an exact matching but incorporates term expansion via thesaurus semantic relationships to produce ranked results that take account of missing and partially matching terms. The matching function is based an a measure of semantic closeness between terms, which has the potential to help with recall problems. The work reported is part of the ongoing FACET project in collaboration with the National Museum of Science and Industry and its collections database. The architecture of the prototype system and its Interface are outlined. The matching problem for compound descriptors is reviewed and the FACET implementation described. Results are discussed from scenarios using the faceted Getty Art and Architecture Thesaurus. We argue that automatic traversal of thesaurus relationships can augment the user's browsing possibilities. The techniques can be applied both to unstructured multi-concept subject headings and potentially to more syntactically structured strings. The notion of a focus term is used by the matching function to model AAT modified descriptors (noun phrases). The relevance of the approach to precoordinated indexing and matching faceted strings is discussed.
-
Cristán, A.L.: SACO and subject gateways (2004)
0.02
0.023290861 = product of:
0.046581723 = sum of:
0.046581723 = product of:
0.093163446 = sum of:
0.093163446 = weight(_text_:headings in 5679) [ClassicSimilarity], result of:
0.093163446 = score(doc=5679,freq=2.0), product of:
0.24837378 = queryWeight, product of:
4.849944 = idf(docFreq=940, maxDocs=44218)
0.051211677 = queryNorm
0.37509373 = fieldWeight in 5679, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.849944 = idf(docFreq=940, maxDocs=44218)
0.0546875 = fieldNorm(doc=5679)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This presentation attempts to fit the subject contribution mechanism used in the Program for Cooperative Cataloging's SACO Program into the context of subject gateways. The discussion points to several subject gateways and concludes that there is no similarity between the two. Subject gateways are a mechanism for facilitating searching, while the SACO Program is a cooperative venture that provides a "gateway" for the development of LCSH (Library of Congress Subject Heading list) into an international authority file for subject headings.
-
Milanesi, C.: Möglichkeiten der Kooperation im Rahmen von Subject Gateways : das Euler-Projekt im Vergleich mit weiteren europäischen Projekten (2001)
0.02
0.020815425 = product of:
0.04163085 = sum of:
0.04163085 = product of:
0.0832617 = sum of:
0.0832617 = weight(_text_:22 in 4865) [ClassicSimilarity], result of:
0.0832617 = score(doc=4865,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.46428138 = fieldWeight in 4865, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=4865)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:41:59
-
Lim, E.: Southeast Asian subject gateways : an examination of their classification practices (2000)
0.02
0.020815425 = product of:
0.04163085 = sum of:
0.04163085 = product of:
0.0832617 = sum of:
0.0832617 = weight(_text_:22 in 6040) [ClassicSimilarity], result of:
0.0832617 = score(doc=6040,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.46428138 = fieldWeight in 6040, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=6040)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:42:47
-
Franco, A.: Gateways to the Internet : finding quality information on the Internet (2004)
0.02
0.019963596 = product of:
0.039927192 = sum of:
0.039927192 = product of:
0.079854384 = sum of:
0.079854384 = weight(_text_:headings in 30) [ClassicSimilarity], result of:
0.079854384 = score(doc=30,freq=2.0), product of:
0.24837378 = queryWeight, product of:
4.849944 = idf(docFreq=940, maxDocs=44218)
0.051211677 = queryNorm
0.3215089 = fieldWeight in 30, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.849944 = idf(docFreq=940, maxDocs=44218)
0.046875 = fieldNorm(doc=30)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Librarians have long sought to select, evaluate, and organize information on the Internet. Efforts began with individual librarians sharing bookmark files of favorite sites and progressed to increasingly large, collaboratively produced general and subject/discipline-specific gateway Web sites or megasites. Megasites list major resources usually in a particular subject area or discipline. Library portals that review, evaluate, and sometimes rate and rank resources grew from some of these Web sites. Both megasites and portals serve as gateways to the Internet. Many portals have developed from relatively small static files into large, dynamically generated databases providing descriptive annotations of selected resources and are increasingly overseen as global projects with formal policies and procedures. Portals now provide increasingly complex and sophisticated browse and search capabilities with a multitude of access points, often including call numbers and subject headings. These are described and compared. Future trends such as increased collaboration among portals; automated location, selection, and cataloging of resources; integration of multiple resource types; and increased access to full-content and virtual library services are also discussed.
-
Price, A.: Five new Danish subject gateways under development (2000)
0.02
0.017346188 = product of:
0.034692377 = sum of:
0.034692377 = product of:
0.06938475 = sum of:
0.06938475 = weight(_text_:22 in 4878) [ClassicSimilarity], result of:
0.06938475 = score(doc=4878,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.38690117 = fieldWeight in 4878, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=4878)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:41:31
-
Gardner, T.; Iannella, R.: Architecture and software solutions (2000)
0.01
0.01387695 = product of:
0.0277539 = sum of:
0.0277539 = product of:
0.0555078 = sum of:
0.0555078 = weight(_text_:22 in 4867) [ClassicSimilarity], result of:
0.0555078 = score(doc=4867,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.30952093 = fieldWeight in 4867, 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=4867)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:38:24
-
Peereboom, M.: DutchESS : Dutch Electronic Subject Service - a Dutch national collaborative effort (2000)
0.01
0.01387695 = product of:
0.0277539 = sum of:
0.0277539 = product of:
0.0555078 = sum of:
0.0555078 = weight(_text_:22 in 4869) [ClassicSimilarity], result of:
0.0555078 = score(doc=4869,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.30952093 = fieldWeight in 4869, 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=4869)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:39:23
-
Campbell, D.: Australian subject gateways : political and strategic issues (2000)
0.01
0.01387695 = product of:
0.0277539 = sum of:
0.0277539 = product of:
0.0555078 = sum of:
0.0555078 = weight(_text_:22 in 4875) [ClassicSimilarity], result of:
0.0555078 = score(doc=4875,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.30952093 = fieldWeight in 4875, 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=4875)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:41:16
-
Dempsey, L.: ¬The subject gateway : experiences and issues based on the emergence of the Resource Discovery Network (2000)
0.01
0.01387695 = product of:
0.0277539 = sum of:
0.0277539 = product of:
0.0555078 = sum of:
0.0555078 = weight(_text_:22 in 628) [ClassicSimilarity], result of:
0.0555078 = score(doc=628,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.30952093 = fieldWeight in 628, 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=628)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:36:13
-
Tudhope, D.; Binding, C.; Blocks, D.; Cunliffe, D.: FACET: thesaurus retrieval with semantic term expansion (2002)
0.01
0.013309063 = product of:
0.026618127 = sum of:
0.026618127 = product of:
0.053236254 = sum of:
0.053236254 = weight(_text_:headings in 175) [ClassicSimilarity], result of:
0.053236254 = score(doc=175,freq=2.0), product of:
0.24837378 = queryWeight, product of:
4.849944 = idf(docFreq=940, maxDocs=44218)
0.051211677 = queryNorm
0.21433927 = fieldWeight in 175, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.849944 = idf(docFreq=940, maxDocs=44218)
0.03125 = fieldNorm(doc=175)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- There are many advantages for Digital Libraries in indexing with classifications or thesauri, but some current disincentive in the lack of flexible retrieval tools that deal with compound descriptors. This demonstration of a research prototype illustrates a matching function for compound descriptors, or multi-concept subject headings, that does not rely on exact matching but incorporates term expansion via thesaurus semantic relationships to produce ranked results that take account of missing and partially matching terms. The matching function is based on a measure of semantic closeness between terms.The work is part of the EPSRC funded FACET project in collaboration with the UK National Museum of Science and Industry (NMSI) which includes the National Railway Museum. An export of NMSI's Collections Database is used as the dataset for the research. The J. Paul Getty Trust's Art and Architecture Thesaurus (AAT) is the main thesaurus in the project. The AAT is a widely used thesaurus (over 120,000 terms). Descriptors are organised in 7 facets representing separate conceptual classes of terms.The FACET application is a multi tiered architecture accessing a SQL Server database, with an OLE DB connection. The thesauri are stored as relational tables in the Server's database. However, a key component of the system is a parallel representation of the underlying semantic network as an in-memory structure of thesaurus concepts (corresponding to preferred terms). The structure models the hierarchical and associative interrelationships of thesaurus concepts via weighted poly-hierarchical links. Its primary purpose is real-time semantic expansion of query terms, achieved by a spreading activation semantic closeness algorithm. Queries with associated results are stored persistently using XML format data. A Visual Basic interface combines a thesaurus browser and an initial term search facility that takes into account equivalence relationships. Terms are dragged to a direct manipulation Query Builder which maintains the facet structure.
-
Kaizik, A.; Gödert, W.; Milanesi, C.: Erfahrungen und Ergebnisse aus der Evaluierung des EU-Projektes EULER im Rahmen des an der FH Köln angesiedelten Projektes EJECT (Evaluation von Subject Gateways des World Wide Web (2001)
0.01
0.012265607 = product of:
0.024531214 = sum of:
0.024531214 = product of:
0.049062427 = sum of:
0.049062427 = weight(_text_:22 in 5801) [ClassicSimilarity], result of:
0.049062427 = score(doc=5801,freq=4.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.27358043 = fieldWeight in 5801, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=5801)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:42:22
-
Heery, R.: Information gateways : collaboration and content (2000)
0.01
0.012142331 = product of:
0.024284663 = sum of:
0.024284663 = product of:
0.048569325 = sum of:
0.048569325 = weight(_text_:22 in 4866) [ClassicSimilarity], result of:
0.048569325 = score(doc=4866,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.2708308 = fieldWeight in 4866, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=4866)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:38:54
-
Price, A.: NOVAGate : a Nordic gateway to electronic resources in the forestry, veterinary and agricultural sciences (2000)
0.01
0.012142331 = product of:
0.024284663 = sum of:
0.024284663 = product of:
0.048569325 = sum of:
0.048569325 = weight(_text_:22 in 4874) [ClassicSimilarity], result of:
0.048569325 = score(doc=4874,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.2708308 = fieldWeight in 4874, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=4874)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:41:00
-
Koch, T.: Quality-controlled subject gateways : definitions, typologies, empirical overview (2000)
0.01
0.012142331 = product of:
0.024284663 = sum of:
0.024284663 = product of:
0.048569325 = sum of:
0.048569325 = weight(_text_:22 in 631) [ClassicSimilarity], result of:
0.048569325 = score(doc=631,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.2708308 = fieldWeight in 631, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=631)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 6.2002 19:37:55
-
Mitchell, S.; Mason, J.; Pender, L.: Enabling technologies and service designs for collaborative Internet collection building (2004)
0.01
0.012142331 = product of:
0.024284663 = sum of:
0.024284663 = product of:
0.048569325 = sum of:
0.048569325 = weight(_text_:22 in 2276) [ClassicSimilarity], result of:
0.048569325 = score(doc=2276,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.2708308 = fieldWeight in 2276, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=2276)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Library hi tech. 22(2004) no.3, S.295-306
-
Schaer, P.: Integration von Open-Access-Repositorien in Fachportale (2010)
0.01
0.012142331 = product of:
0.024284663 = sum of:
0.024284663 = product of:
0.048569325 = sum of:
0.048569325 = weight(_text_:22 in 2320) [ClassicSimilarity], result of:
0.048569325 = score(doc=2320,freq=2.0), product of:
0.17933457 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051211677 = queryNorm
0.2708308 = fieldWeight in 2320, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=2320)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Wissensspeicher in digitalen Räumen: Nachhaltigkeit - Verfügbarkeit - semantische Interoperabilität. Proceedings der 11. Tagung der Deutschen Sektion der Internationalen Gesellschaft für Wissensorganisation, Konstanz, 20. bis 22. Februar 2008. Hrsg.: J. Sieglerschmidt u. H.P.Ohly
