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ERIC Number: ED054815
Record Type: Non-Journal
Publication Date: 1970
Reference Count: N/A
Modified Double KWIC Coordinate Index. Refinements in Main Term and Subordinate Term Selection.
Lay, W. Michael; Petrarca, Anthony E.
A new approach to creating the double KWIC Coordinate Index consists of extracting potential main terms directly from the titles (or title-like Phrases) instead of from a KWIC index of the titles, and sorting and temporarily retaining the potential index entries in a KWOC type format until other conditions are examined. After all of the titles have been processed and the actual main terms have been selected, if the number of titles containing a particular main term exceeds an abitrarily assigned threshold value, conventional double KWIC (permuted) subordinate entries are created. If the threshold value is not exceeded, KWOC-type (non-permuted) subordinate entries are created. Other refinements which improve the overall quality of the index have also been introduced. In addition, the new approach facilitates gathering of statistics which will help to reduce the manual and intellectual effort previously required for selection of main terms. The system design for creating the modified Double KWIC Coordinate Index is discussed together with some operating statistics for producing such an index. The use of statistical relationships to create cross references between certain types of terms is also explored. (Author/NH)
Publication Type: N/A
Education Level: N/A
Sponsor: National Science Foundation, Washington, DC. Div. of Science Information.
Authoring Institution: Ohio State Univ., Columbus. Computer and Information Science Research Center.