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functions of a thesaurus the major functions of a thesaurus include the following a it provides a standard vocabulary for a given subject
definition there are a number of definitions of thesaurus provided by different experts and organisations the most comprehensive
thesaurus the word thesaurus comes from greek term thesauros meaning a storehouse or treasury of words the oxford english dictionary
functions of a subject authority file the functions of a subject authority file are discussed below cataloguing the subject authority file
levels of subject authority control subject authority control is exercised at two levels central and local at the central level a central
subject authority file meaning most libraries maintain a subject authority file consisting of subject authority records in order to ensure
list of subject headings - general principles the rules for subject headings in a dictionary catalogue were formulated by charles ammi cutter
meaning a vocabulary control device depends on a master list of terms that can be assigned to documents such a master list of terms is called
subject headings list subject heading has been defined as a word or group of words indicating a subject under which all materials dealing
entry vocabulary and index vocabulary terms linked by equivalence relationships are rather different from those in the other two groups
requirements the important requirements of a controlled vocabulary are as follows it should have warrant derived from the terminology of
objectives there are basically two objectives for having a controlled vocabulary a to promote the consistent representation of the
meaning and need the term vocabulary control refers to a limited set of teal that must be used to index documents and to search for these
vocabulary control subject cataloguingindexing involves assigning terms to represent what the document is about the complete set of
online public access catalogue opac by late 1970s libraries began to use computers for cataloguing purpose and the idea of making the catalogue
post-coordinate indexing systems these systems arc also called coordinate indexing systems as in the pre-coordinate systems the starting point
pre-coordinate indexing systems pre-coordinate indexing systems are conventional systems mostly found in printed indexes in this type of system
definition of an indexing system let us now look at some of the definitions available in the literature of library and information science one
indexing systems the preparation of a series of entries for inclusion in a subject catalogue or in a printed index is known as
thesauri the dictionary meaning of the word thesaurus is a collection of words put in groups together according to likenesses in their meaning
controlled indexing language in the foregoing paragraphs we have discussed the concept of an indexing language as also the categories into
free indexing language it is the nature of free indexing that any word or term-that suits the subject may be assigned as a subject heading in
natural indexing language one of the greatest hurdles in discussing natural indexing language is that it is not easy to identify or know as to
alphabetical indexing languages in this section let us look at the concept of indexing language its categories and functional use let
display of subject relationships the vital problem concerned with the alphabetical subject approach is the naming labeling of subjects