loading...| Preferred Name |
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http://bioontology.org/projects/ontologies/birnlex#birnlex_2338 |
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true |
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| definition |
A formal definition of a thesaurus designed for indexing is: * a list of every important term (single-word or multi-word) in a given domain of knowledge; and * a set of related terms for each term in the list. Terms are the basic semantic units for conveying concepts. They are usually single-word nouns, since nouns are the most concrete part of speech. Verbs can be converted to nouns -- cleans to cleaning, reads to reading, and so on. Adjectives and adverbs, however, seldom convey any meaning useful for indexing. When a term is ambiguous, a "scope note" can be added to ensure consistency, and give direction on how to interpret the term. Naturally, not every term needs a scope note, but their presence is of considerable help in using a thesaurus correctly and reaching a correct understanding of the given field of knowledge. Term relationships are links between terms that often describe synonyms, near-synonyms, or hierarchical relations. Synonyms and near-synonyms are indicated by a Related Term (RT). The way the term "Cybernetics" is related to the term "Computers" is an example of such a relationship. Hierarchical relationships are used to indicate terms which are narrower and broader in scope. A Broader Term (BT) is a more general term, e.g. "Apparatus" is a generalization of "Computers". Reciprocally, a Narrower Term (NT) is a more specific term, e.g. "Digital Computer" is a specialization of "Computer". BT and NT are reciprocals; a broader term necessarily implies at least one other term which is narrower. Thesaurus designers are generally careful to ensure that BT and NT indicate class relationships, as distinguished from part-whole relationships. Some thesauri also include Use (USE) and Used For (UF) indicators when an authorized term is to be used for another, unauthorized, term; for example the entry for the authorized term "Frequency" could have the indicator "UF Pitch". Reciprocally, the entry for the unauthorized term "Pitch" would have the indicator "USE Frequency". |
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Thesaurus |
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| mod_date |
2007-10-11 |
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Thesaurus |
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| prefixIRI |
birnlex_2338 |
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Thesaurus |
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false |
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http://bioontology.org/projects/ontologies/birnlex#birnlex_2334 |