Organization and Retrieval of information Notes
ORGANIZATION AND RETRIEVAL OF INFORMATION LIBRARY (BOOK) CLASSIFICATION It is the process of determining the main subjects of an item and characteristic and then expressing them by the most appropriate notation from a classification scheme. Broad (general) classification is a method of classifying item under the general (main) division and sub- division of a classification scheme. Closed (specific) classification is a method of classifying items as specifically as possible using a minute breakdown into narrower concepts of the classification schemes. Purpose of Library Classification Facilitate shelving or arrangement of primary documents in a library collection. Facilitate the replacement or re- shelving of documents in their proper places on the shelves after use. Help in shelving newly acquired document in their proper places amongst the existing documents. Facilitate the filing of bibliographic records in systematic files. Facilitate in book displays so that users can browse though the shelves. Facilitate the inclusion of bibliographic records or reference in printed catalogue or other retrieval tools. Collocate items that are related by subject. Collocate – bring together. ADVANTAGE AND DISADVANTAGES OF LIBRARY CLASSIFICATION Library classification is a process of arranging documents in a library based on the subject contents and form of presentation that are assigned class numbers / notation from a classification scheme. Advantages of Library Classification Facilitates the evaluation of a library stock as it is possible to find out it weak and strong subject areas. Facilitate orderly arrangement of documents in a library collection. Enhance book displays that are essential for browsing end users. Facilities the process of stock taking based on the call numbers assigned to the documents Bibliographic searchers by the library staff and users and their compilation is made easier. Saves the time of the library staff and user information retrieval. Makes it possible to rep ( re- shelve ) items in their proper places on the shelves after uses Helps in shelving new documents in their proper amongst the existing one on the shelve. Facilitates weeding of the library stock. Ensures compilation of subject bibliographical indexes catalogues and users suggestion and borrower stations. Enhances the compilation of a shelf list. It compliments cataloging work as it facilitates creation, call number and subject cataloguing though chain indexing procedure. The call number help users of the catalogue locate from the library collection. Disadvantages Of Library Classification Only one relationship of a subject can be shown even if the work covers more than one subject. Only one class number can be assigned to a document. Re classification of documents is necessary as new knowledge and new classes are created. Re – classification is time consuming. Classification may generate long and confusing notations that have no meaning to the end users. Frequently consulted items will give rise to disorderness of the classified stock. Such items are likely to be mis-shelved. It cannot produce all what a user requires at one point as documents may be separated according to other criteria g. reference book may be separated from the general lending stock. Documents can only be arranged in one based in one order on one class number. This does not enhance search by title, author and subject. Only a given part of the items are visible in the classified collection. Those on loan. Left on the relating tables may never be retrieved as they are not reflected on the shelves. DETERMINING THE SPECIFIC SUBJECT OF AN ITEM 3 types of subjects recognized in subject analysis are: Simple subject – it’s a subject that deals with a whole main class or a single aspect of a whole main class e.g. Mathematic, calculus, organic, chemistry all from class 500 Compound subject – it’s a subject that combines two or more simple subject’s e.g. biographic, biochemistry. Complex subjects – It’s a subject that combine two or more simple subject that do not come from the same whole main class or is discipline e.g., a study of the use of philosophy in religion and the study of religion in science. Parts of Book Useful To A Classifier Title An indicative title will obviously indicate the subject of the work g. a book entitled “ Economics” Table of contents (TOC) TOC shows the main topics covered in a book therefore may indicate the subjects covered Chapter heading and subheading In the absence of a TOC these may be used in the same way as TOC. Introduction A good introduction usually indicates the subject or focus of the book. Preference or foreword This will provide the original purpose of the author in writing the book. A bibliography, bibliographic footnotes and references. Text proper and book reviews Colophon – a brief description of the manuscript of book to which its attached Page where you will get a trade mark and address Refers to a short summery or promotional piece accompanying a creative work Blurb – back page Cataloguing copy e.g. CIP data Reference book and subject experts. Book reviews – a description, critical analysis and an evolution on the quantity and significance of a book. METHODS OF DETERMINING THE SUBJECT CONTENT OF A WORK Positive Method The classifier determine what the author is describing the document. The classifier aims at finding out the purpose of the work by examining various parts of the book e.g. burb, preface, foreword, introduction, colophon. The purpose of the work forms the basis of the subject of the item Method Of Appealing To Unity (Rule Of Rejection Or Selection) The classifier determines what has been said in the book (selected) and what has not been said (rejected) this is done by thoroughly examining the whole book. What has been selected forms the basis of the subject of the work. Figure Ground Method The classifier determines the central figure of theme of the item by analyzing the whole book. The theme or central figure becomes the subject of the work. Objective Method The classifier counts the number of bibliographic reference to subjects covered in a document. The subject with move reference becomes the
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