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Permuted Title Indexes

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Zhee abanilla

on 28 August 2014

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Transcript of Permuted Title Indexes

Permuted Title Indexes
KWIC
KWIC is an acronym for Key Word In Context, the most common format for concordance lines. The term KWIC was first coined by Hans Peter Luhn. The system was based on a concept called keyword in titles which was first proposed for Manchester libraries in 1864 by Andrea Crestadoro.

A KWIC index is formed by sorting and aligning the words within an article title to allow each word (except the stop words) in titles to be searchable alphabetically in the index. It was a useful indexing method for technical manuals before computerized full text search became common.
KWOC
KWOC is the variation of KWIC index.
No content analysis is necessary, all indexing is fully automatic, thus cutting indexing time and cost. Index terms are directly representative of the author's terminology and thus are not constraint by obsolete and restrictive schemes.
KWOC also accepts as input a file of words that are ignore during the indexing.
Example of KWIC
Example of KWIC
Example of KWIC
It helps users decide if that document would satisfy their information needs.
Titles effectively indicate the content of the document.
It can be done quickly, with a minimum cost, and entirely by computer.


KWAC
KWAC
An acronym for Keyword and Context, an algorithmically generated index in which keywords from the title of a document are printed as heading along the left hand margin of the page, with the portion of the title or text following each keyword indented under the heading, followed by the portion of title or text preceding the word.
The titles may not accurately reflect the main content.
The limited number of terms in the titles restrict complete subject indication.
Most of the indexes are unappealing to the eye and are difficult to scan.
The lack of vocabulary control can increase the retrieval of irrelevant documents.
KWOC
Drawbacks
KWAC
Full transcript