Permuted Title Index

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Permuted Title Index

  1. 1. Permuted Title Indexes- It helps users decide if that document would satisfytheir information needs.•Permuted Title word Indexes, created by systematically rotatinginformation-conveying words in the title as subject entry points into theindex.•The premise of Permuted Title Index is that titles effectively indicate thecontent of documents.• Weinberg Report ( U.S President’s Science Advisory Committee, 1963)-recommended that the scientific community be urged to write specific titlesthat clearly convey the subject of papers. Information people have always feltthat the title is an important subject indicator and could be the basis of auseful index.• The best argument for creating permuted title indexes is simple: it can bedone quickly, with a minimum cost, and entirely by computer.
  2. 2. •The most popular Permuted title indexes are the so-called KWIC and KWOCindexes.•KWIC- means key word in context. KWOC- means key word out of context.Example of KWIC index:Blue-eyed Cats in TexasThe Cat and the FiddleDogs and Cats and Their DiseasesThe Cat and the EconomyThe KWIC index is an alphabetical list, ordered on each subject-conveyingword in the title. In Texas, Blue-eyed Cats..................................23 The Cat and the Economy........................12 The Cat and the Fiddle.............................17 Dogs and Cats and Their Diseases.................. 3 Blue-eyed Cats in Texas......................................23 and Their Diseases, Dogs and Cats....................3Their Diseases Dogs and Cats and............................... and the Economy, The Cat...............................12 and the Fiddle, The Cat....................................17 in Texas, Blue-eyed Cats.....................23
  3. 3. A KWOC Index Doesn’t rotate the title, but lift outs the keyword ofinterest and lists its separately to the side.Example:Blue-eyed Blue-eyed Cats in Texas..........................23Cat The Cat and the Economy.......................12Cat The Cat and the Fiddle............................17Cats Dogs and Cats and Their Diseases...........3Cats Blue-eyed Cats in Texas..........................23Diseases Dogs and Cats and Their Diseases...........3Dogs Dogs and Cats and Their Diseases...........3Economy The Cat and the Economy.......................12Fiddle The Cat and the Fiddle...........................17Texas Blue-eyed Cats in Texas..........................23Permuted title indexes, often use stop-lists. These are words thatare unsuitable as subject indicators. Clearly , such words as theand an belong on such stop-list.Although there has been some disillusionment with permuted titleindexes, they still serve a useful purpose.
  4. 4. Faceted scheme is a type of synthetic classification and is often calledan analytico-synthetic systemFacet- means one side of something that has many sides.Facet Index attempts to discover all the individual aspects of a subjectand then synthesize them in a way that best describes the subject underdiscussionEnumerated System are fixed and can accommodate new knowledge inlimited ways, whereas faceted system are much more flexible.For example suppose the concept air-to-ground missile was a part ofour knowledge scheme, but not ground-to-air missile.
  5. 5. Example:AIR-TO-GROUND-MISSILEBut not on the other therm. A book on ground-to-air missiles would have to beclassified under a more general term, such as “Weapons”.AIRGROUNDMISSILEAnd this would allow us to easily fit to each together each type of theclassification.AIR-TO-GROUND MISSILEGROUND-TO-AIR MISSILE
  6. 6. Faceted system is precoordinated at the time of indexing and is arrangedin classification order, rather than in straight alphabetical order.•S.R Ranganathan, a major pioneer of modern librarianship. began his work inclassification research in 1925 and in the 1930s he published his basic worksin facet classification.•A facet is a list of words with each term having an exact relation to thesubject of which it is a part. A facet can be forms, or entities, operations,states of being and so forth.•The arrangement of the facets is based on assumed user needs and the wayusers will approach the system.
  7. 7. We will construct a facet scheme for cats. First, we break our subject into theconcepts that interest us most. For our purpose, we might assume that the facetsare (a) type of cat, (b) color of cat, and (c) IQ of cat.Next, we list the possibilities under the three facet headings: Type Color IQ Abyssinian white 0-10 Burmese black 11-20 Himalayan blue 21-30 Manx gray 31-40 Persian brown 41-50 Siamese green above 50Once this is done, we nee a code or notation. To keep things simple, we utilize asimple numeric code of 1,2,3,..etc, and we have the ff: Type Color IQ 1.Abyssinian 1 white 1 0-10 2 Burmese 2 black 2 11-20 3.Himalayan 3 blue 3 21-30 4 Manx 4 gray 4 31-40 5 Persian 5 brown 5 41-50

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