FRINK Linked Data Fragments server

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• W98687372 abstract "A number of problems arise when two or more subject systems reside in the same online catalog. One solution to this vocabulary is to map the systems involved. Since 1990, a project to map the LCSH and MeSH vocabularies has been carried out at Northwestern University. The LCSH/MeSH mapping data are now available for distribution to other libraries and information centers. The data can be used to generate displays in online catalogs that link corresponding LCSH and MeSH headings, thus enhancing retrieval of relevant bibliographic citations. The Multiple Vocabulary Problem Many libraries have online public access catalogs that contain two or more subject systems. Some examples of thesauri that may co-exist in the same catalog are: LCSH (Library of Congress Subject Headings), MeSH (Medical Subject Headings from the National Library of Medicine), AAT (Art and Architecture Thesaurus), TLSH (Transportation Library Subject Headings from Northwestern University), as well as other locally developed systems. A number of different methods have been proposed for dealing with multiple vocabularies in the online catalog.(1) The two most commonly used by library management systems (with some systems providing an option to use either) are discussed below. One option is to segregate the subject systems, so that only one system at a time can be searched. The obvious disadvantage of separating subject systems is that a user may not retrieve all of the materials on a given topic. The following examples (taken from the Northwestern University online catalog which includes LCSH, MeSH, and TLSH) demonstrate the potential for incomplete retrieval from a given subject search in a divided catalog. 1. A search for the LCSH heading COGNITIVE DISSONANCE retrieves 19 bibliographic citations, while a search with the identical MeSH heading retrieves only 1 citation. Obviously, a user searching only the MeSH index will miss 18 citations. 2. A search for the LCSH heading BONE DENSITOMETRY yields 4 citations, while a search in the MeSH index for the same term yields no citations! This is because there is no heading (or entry term) in MeSH for this concept. A user searching only the MeSH index may come away with the impression that there are no materials in the library on this topic, while in fact that there are at least 4. 3. A search for the MeSH heading HISTORY OF MEDICINE 17TH CENTURY yields 31 citations, while a search for the corresponding LCSH heading MEDICINE-HISTORY-17TH CENTURY gives 6 citations. A user searching only LCSH will miss 28 citations, while a user searching only MeSH will miss 3 citations. The second option is to provide a universal subject search of a vocabulary in which terms from all vocabularies in the catalog are retrieved together. This alleviates somewhat the problem of incomplete retrieval (chiefly examples 1 and 2 above) encountered in segregated catalogs. However, a universal subject search of a mixed vocabulary opens up a new set of problems (especially if authority records are involved), and still does not completely resolve the problem of incomplete retrieval of bibliographic citations. Examples of some of the more serious problems that can arise from a universal subject search in an online catalog in which the LCSH and MeSH systems are mixed are given below. 1. Duplicate retrieval of entries from the same bibliographic record when the LCSH and MeSH headings are identical after normalization (e.g., COGNITIVE DISSONANCE). 2. Headings in one system may conflict with search under references in another system (e.g., CLINICAL PHARMACOLOGY is an established heading in LCSH, but a search under reference in MeSH; while, on the other hand, PHARMACOLOGY CLINICAL is an established heading in MeSH, but a search under reference in LCSH.) 3. Even with the implementation of a universal subject search encompassing both systems, there is still potential for incomplete or partial retrieval of citations (example 3 above) because there is still no linking of corresponding headings in the two systems. …" @default.
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• W98687372 title "Mapping the LCSH and MeSH systems" @default.
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