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| Automatic Indexing | 9 |
| Information Retrieval | 8 |
| Classification | 5 |
| Indexing | 3 |
| Information Storage | 3 |
| Information Systems | 3 |
| Relevance (Information… | 3 |
| Algorithms | 2 |
| Cluster Analysis | 2 |
| Data Processing | 2 |
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| Information Storage and… | 9 |
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| Sparck Jones, Karen | 2 |
| Bichteler, Julie | 1 |
| Gray, W. A. | 1 |
| Hafer, Margaret A. | 1 |
| Kelly, J. R. | 1 |
| Minker, Jack | 1 |
| Parsons, Ronald G. | 1 |
| Popper, P. | 1 |
| Prywes, Noah S. | 1 |
| Weiss, Stephen F. | 1 |
| Yu, Clement T. | 1 |
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Sparck Jones, Karen – Information Storage and Retrieval, 1973
Retrieval performance with automatic term classifications for three test collections has been variable. This paper attempts to discover why. The real difference between the collections is in the separation of relevant from non-relevant documents. The separation is so poor that classification cannot be expected to succeed. (14 references)…
Descriptors: Automatic Indexing, Classification, Cluster Analysis, Databases
Minker, Jack; And Others – Information Storage and Retrieval, 1972
An evaluation of graph theoretical clusters of index terms which can be extracted from an automatically indexed document collection, and the effects of employing such clusters in automatic document retrieval are described. (19 references) (Author)
Descriptors: Automatic Indexing, Cluster Analysis, Data Processing, Information Retrieval
Sparck Jones, Karen – Information Storage and Retrieval, 1973
The logic of different types of weighting are discussed, and experiments testing weighting schemes of these types are described. The results show that one type of weighting leads to material performance improvements in quite different collection environments. (22 references) (Author)
Descriptors: Automatic Indexing, Classification, Indexing, Information Retrieval
Yu, Clement T. – Information Storage and Retrieval, 1974
Heuristic methods for the construction of term classes are presented and experimental results are obtained to illustrate the usefulness of the method. (Author/PF)
Descriptors: Algorithms, Automatic Indexing, Classification, Cluster Grouping
Bichteler, Julie; Parsons, Ronald G. – Information Storage and Retrieval, 1974
An automatic classification technique using patterns formed by citations in document bibliographies was found to give 62 percent precision and 45 percent recall in a sample file of physics documents. (PF)
Descriptors: Algorithms, Automatic Indexing, Bibliographies, Citations (References)
Hafer, Margaret A.; Weiss, Stephen F. – Information Storage and Retrieval, 1974
Describes a method for automatically segmenting words into their stems and affixes using certain statistical properties of a corpus to indicate where words should be divided. (Author/PF)
Descriptors: Automatic Indexing, Computational Linguistics, Information Retrieval, Lexicography
Gray, W. A. – Information Storage and Retrieval, 1971
The technique described enables an on line computer based information retrieval system to aid indexers by selecting possible indexing terms to be assigned to a new document entering the system. The economic aspect of implementing the technique in a working information retrieval system is considered. (16 references) (Author/MM)
Descriptors: Automatic Indexing, Cost Effectiveness, Indexing, Information Systems
Kelly, J. R.; Popper, P. – Information Storage and Retrieval, 1971
Described is International Nickel's Technical Information System which involves cooperation between the London and New York offices. The problems of coordination, selection, vocabulary control, computer compatibility, communication and security are discussed. (4 references) (SJ)
Descriptors: Agency Cooperation, Automatic Indexing, Cooperative Programs, Costs
And Others; Prywes, Noah S. – Information Storage and Retrieval, 1974
Reports on a series of programs that have been developed to process data bases, consisting of textual items, and to index and arrange (classify) the data items in accordance with an automatically generated classification system. (Author)
Descriptors: Automatic Indexing, Automation, Classification, Computer Programs
