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# DDC

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### DDC

1. 1. Dewey Decimal Classification & “WebDewey” Brenton Stewart, MSLS, Ph.D.
2. 2. Announcements Next Week • Ignite Project Workshop – No chat next week (Due 11/18) • Metadata System Review (Due 12/2) – start thinking about a site – Archive / Museum – Library OPAC (academic, school, special) – Digital Libraries
3. 3. Last Week • Subject Analysis • Classification Web • How did it go?
4. 4. Dewey Decimal Classification • Melvil Dewey (18511931) • Amherst College Librarian • A Classification and Subject Index for Cataloging and Arranging Books and Pamphlets of a Library ~1876
5. 5. DDC Basic Principles • • • • Decimal Structure Ten main classes Ten divisions in each main class Pure Arabic numbers
6. 6. Image from OCLC
7. 7. Assigning Classification Numbers • Look the subject up in the index • Consult the schedule for the suggested number(s) (WebDewey – click on suggested numbers) • If more than one number is suggested decide which one is the best for the item being classified
8. 8. What do you mean by shellfish? Shellfish: as Marine Animal ( Zoology) Shellfish as Public Health issue Shellfish as human food (Cookbook)
9. 9. Methods of Assigning Numbers • Schedule numbers - these numbers are taken directly from the schedules with no modifications required. • Adding a full number - Combining two numbers from the schedules to create the number assigned. You only do this when instructed to do so in the schedules.
10. 10. Building Numbers Fine Arts Library: IU • Libraries specializing in the fine arts • Libraries = 026 • Fine Arts = 700 • 026 + 700 = 026.7 • (drop the trailing zeros - Dewey classification numbers never end with a zero after a decimal, although they may end with a zero if there is no decimal) Image Source: libraries.iub.edu
11. 11. • • • • • Adding part of a number, e.g., Wages in textile industries 331.2877 Wages 331.28 Textiles 677 The note under 331.28 says "Add to base number 331.28 the numbers following 6 in 620690. • The classification number for textiles is 677. Only the 77 is used as per the instructions.
12. 12. BIOGRAPHY • Classification of Biography • • Biography 920 Possible treatments - depends on needs of library and whether local policy dictates that all biographies be shelved together in one section or classified by subject orientation.
13. 13. “B” “BIO”
14. 14. DRILL DOWN THROUGH SCHEDULES! LEVEL ONE LEVEL TWO LEVEL THREE LEVEL FOUR Image Source: Wikipedia
15. 15. Dewey Exercise • Laws regarding loans • Dictionaries, Encyclopedias, Concordances • Hierarchy
16. 16. EXAMPLE 1: Classification
17. 17. EXAMPLE 2 • Dictionary of Biological terms
18. 18. EXAMPLE 3: Hierarchy
19. 19. Hierarchy