-
Chan, L.M.; Vizine-Goetz, D.: Towards a computer-generated subject validation file : feasibility and usefulness (1998)
0.02
0.015874503 = product of:
0.07937251 = sum of:
0.07937251 = weight(_text_:conversion in 1781) [ClassicSimilarity], result of:
0.07937251 = score(doc=1781,freq=2.0), product of:
0.23715246 = queryWeight, product of:
6.0585327 = idf(docFreq=280, maxDocs=44218)
0.039143547 = queryNorm
0.3346898 = fieldWeight in 1781, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.0585327 = idf(docFreq=280, maxDocs=44218)
0.0390625 = fieldNorm(doc=1781)
0.2 = coord(1/5)
- Abstract
- Recognition, by libraries, of the need for improved efficiency and reliability in subject authority control in catalogues led to a study of the feasibility of automatically creating a subject heading validation file by scanning the OLUC. The premises were: that although the file would not be axhaustive, it would contain the majority of frequently used headings; and that the predicted level of accurary in the file would be high. A sample file of Library of Congress assigned subject headings, from the OCLC Subject Headings Corrections database was analyzed. Results showed that: the frequency of use varies inversely with the number of headings at a given rrate of use; a small number of headings with high frequencies of use accounts for the majority of total use, while a large proportion shows very low frequency of use; topical headings account for 2/3 of assigned headings; and error and obsolescence rates are both low and are in inverse relationship to the frequency of heading use. Concludes that an automatically generated subject heading validation file is feasible and could serve various purposes, including: verification of subject heading strings constructed by cataloguers; updating of subject headings in catalogue maintenance; and validation of subject headings during retrospective catalogue conversion
-
Chan, L.M.; Zeng, M.L.: Metadata interoperability and standardization - a study of methodology, part I : achieving interoperability at the schema level (2006)
0.02
0.015874503 = product of:
0.07937251 = sum of:
0.07937251 = weight(_text_:conversion in 1176) [ClassicSimilarity], result of:
0.07937251 = score(doc=1176,freq=2.0), product of:
0.23715246 = queryWeight, product of:
6.0585327 = idf(docFreq=280, maxDocs=44218)
0.039143547 = queryNorm
0.3346898 = fieldWeight in 1176, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.0585327 = idf(docFreq=280, maxDocs=44218)
0.0390625 = fieldNorm(doc=1176)
0.2 = coord(1/5)
- Abstract
- The rapid growth of Internet resources and digital collections has been accompanied by a proliferation of metadata schemas, each of which has been designed based on the requirements of particular user communities, intended users, types of materials, subject domains, project needs, etc. Problems arise when building large digital libraries or repositories with metadata records that were prepared according to diverse schemas. This article (published in two parts) contains an analysis of the methods that have been used to achieve or improve interoperability among metadata schemas and applications, for the purposes of facilitating conversion and exchange of metadata and enabling cross-domain metadata harvesting and federated searches. From a methodological point of view, implementing interoperability may be considered at different levels of operation: schema level, record level, and repository level. Part I of the article intends to explain possible situations in which metadata schemas may be created or implemented, whether in individual projects or in integrated repositories. It also discusses approaches used at the schema level. Part II of the article will discuss metadata interoperability efforts at the record and repository levels.
-
Chan, L.M.; Hodges, T.: Entering the millennium : a new century for LCSH (2000)
0.01
0.0127859535 = product of:
0.031964883 = sum of:
0.016054653 = product of:
0.032109305 = sum of:
0.032109305 = weight(_text_:29 in 5920) [ClassicSimilarity], result of:
0.032109305 = score(doc=5920,freq=2.0), product of:
0.13769476 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.039143547 = queryNorm
0.23319192 = fieldWeight in 5920, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=5920)
0.5 = coord(1/2)
0.01591023 = product of:
0.03182046 = sum of:
0.03182046 = weight(_text_:22 in 5920) [ClassicSimilarity], result of:
0.03182046 = score(doc=5920,freq=2.0), product of:
0.13707404 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039143547 = queryNorm
0.23214069 = fieldWeight in 5920, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=5920)
0.5 = coord(1/2)
0.4 = coord(2/5)
- Date
- 27. 5.2001 16:22:21
- Series
- Cataloging and classification quarterly; vol.29, nos.1/2
-
Chan, L.M.; Zeng, M.L.: Metadata interoperability and standardization - a study of methodology, part II : achieving interoperability at the record and repository levels (2006)
0.01
0.012699601 = product of:
0.063498005 = sum of:
0.063498005 = weight(_text_:conversion in 1177) [ClassicSimilarity], result of:
0.063498005 = score(doc=1177,freq=2.0), product of:
0.23715246 = queryWeight, product of:
6.0585327 = idf(docFreq=280, maxDocs=44218)
0.039143547 = queryNorm
0.26775184 = fieldWeight in 1177, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.0585327 = idf(docFreq=280, maxDocs=44218)
0.03125 = fieldNorm(doc=1177)
0.2 = coord(1/5)
- Abstract
- This is the second part of an analysis of the methods that have been used to achieve or improve interoperability among metadata schemas and their applications in order to facilitate the conversion and exchange of metadata and to enable cross-domain metadata harvesting and federated searches. From a methodological point of view, implementing interoperability may be considered at different levels of operation: schema level (discussed in Part I of the article), record level (discussed in Part II of the article), and repository level (also discussed in Part II). The results of efforts to improve interoperability may be observed from different perspectives as well, including element-based and value-based approaches. As discussed in Part I of this study, the results of efforts to improve interoperability can be observed at different levels: 1. Schema level - Efforts are focused on the elements of the schemas, being independent of any applications. The results usually appear as derived element sets or encoded schemas, crosswalks, application profiles, and element registries. 2. Record level - Efforts are intended to integrate the metadata records through the mapping of the elements according to the semantic meanings of these elements. Common results include converted records and new records resulting from combining values of existing records. 3. Repository level - With harvested or integrated records from varying sources, efforts at this level focus on mapping value strings associated with particular elements (e.g., terms associated with subject or format elements). The results enable cross-collection searching. In the following sections, we will continue to analyze interoperability efforts and methodologies, focusing on the record level and the repository level. It should be noted that the models to be discussed in this article are not always mutually exclusive. Sometimes, within a particular project, more than one method may be used.
-
Chan, L.M.: Dewey Decimal classification : organizing the world of knowledge for the world (1997)
0.01
0.007568236 = product of:
0.03784118 = sum of:
0.03784118 = product of:
0.07568236 = sum of:
0.07568236 = weight(_text_:29 in 4488) [ClassicSimilarity], result of:
0.07568236 = score(doc=4488,freq=4.0), product of:
0.13769476 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.039143547 = queryNorm
0.5496386 = fieldWeight in 4488, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.078125 = fieldNorm(doc=4488)
0.5 = coord(1/2)
0.2 = coord(1/5)
- Date
- 15. 3.2000 12:29:44
- Source
- Dewey Decimal Classification: Edition 21 and International perspectives: papers from a workshop presented at the General Conference of the International Deferation of Library Associations and Institutions (IFLA), Beijing, China, August 29, 1996. Ed.: L.M. Chan and J.S. Mitchell
-
Chan, L.M.; Mitchell, J.S.: Dewey Decimal Classification : principles and applications (2003)
0.01
0.007424775 = product of:
0.037123874 = sum of:
0.037123874 = product of:
0.07424775 = sum of:
0.07424775 = weight(_text_:22 in 3247) [ClassicSimilarity], result of:
0.07424775 = score(doc=3247,freq=2.0), product of:
0.13707404 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039143547 = queryNorm
0.5416616 = fieldWeight in 3247, 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=3247)
0.5 = coord(1/2)
0.2 = coord(1/5)
- Object
- DDC-22
-
Chan, L.M.: Library of Congress Subject Headings : principles and application (1995)
0.01
0.006364092 = product of:
0.03182046 = sum of:
0.03182046 = product of:
0.06364092 = sum of:
0.06364092 = weight(_text_:22 in 3985) [ClassicSimilarity], result of:
0.06364092 = score(doc=3985,freq=2.0), product of:
0.13707404 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039143547 = queryNorm
0.46428138 = fieldWeight in 3985, 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=3985)
0.5 = coord(1/2)
0.2 = coord(1/5)
- Date
- 25.11.2005 18:37:22
-
O'Neill, E.T.; Chan, L.M.; Childress, E.; Dean, R.; El-Hoshy, L.M.; Vizine-Goetz, D.: Form subdivisions : their identification and use in LCSH (2001)
0.00
0.003182046 = product of:
0.01591023 = sum of:
0.01591023 = product of:
0.03182046 = sum of:
0.03182046 = weight(_text_:22 in 2205) [ClassicSimilarity], result of:
0.03182046 = score(doc=2205,freq=2.0), product of:
0.13707404 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039143547 = queryNorm
0.23214069 = fieldWeight in 2205, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=2205)
0.5 = coord(1/2)
0.2 = coord(1/5)
- Date
- 10. 9.2000 17:38:22
-
Chan, L.M.; Hodges, T.L.: Library of Congress Classification (LCC) (2009)
0.00
0.003182046 = product of:
0.01591023 = sum of:
0.01591023 = product of:
0.03182046 = sum of:
0.03182046 = weight(_text_:22 in 3842) [ClassicSimilarity], result of:
0.03182046 = score(doc=3842,freq=2.0), product of:
0.13707404 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.039143547 = queryNorm
0.23214069 = fieldWeight in 3842, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=3842)
0.5 = coord(1/2)
0.2 = coord(1/5)
- Date
- 27. 8.2011 14:22:42
-
Yi, K.; Chan, L.M.: Linking folksonomy to Library of Congress subject headings : an exploratory study (2009)
0.00
0.0021406205 = product of:
0.010703102 = sum of:
0.010703102 = product of:
0.021406204 = sum of:
0.021406204 = weight(_text_:29 in 3616) [ClassicSimilarity], result of:
0.021406204 = score(doc=3616,freq=2.0), product of:
0.13769476 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.039143547 = queryNorm
0.15546128 = fieldWeight in 3616, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03125 = fieldNorm(doc=3616)
0.5 = coord(1/2)
0.2 = coord(1/5)
- Date
- 20. 6.2010 14:29:15
