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Dewey Decimal Classification
&
WebDewey

Brenton Stewart, MSLS, Ph.D.
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
Last Week
 Subject Analysis
 Classification Web
 How did it go?
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
DDC Basic Principles





Decimal Structure
Ten main classes
Ten divisions in each main class
Pure Arabic numbers
Image from OCLC
DDC
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
What do you mean by shellfish?

Shellfish: as Marine Animal (
Zoology)

Shellfish as Public
Health issue

Shellfish as
human food
(Cookbook)
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.
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
DDC
DDC
DDC
DDC






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.
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.
DDC
B
BIO
DRILL DOWN THROUGH
SCHEDULES!
LEVEL ONE
LEVEL TWO

LEVEL THREE
LEVEL FOUR

Image Source: Wikipedia
Dewey Exercise
 Laws regarding loans
 Dictionaries, Encyclopedias,
Concordances
 Hierarchy
EXAMPLE 1: Classification
DDC
DDC
DDC
EXAMPLE 2
 Dictionary of Biological terms
DDC
DDC
DDC
DDC
DDC
DDC
EXAMPLE 3: Hierarchy
DDC
DDC
Hierarchy

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DDC

  • 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. Last Week Subject Analysis Classification Web How did it go?
  • 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. DDC Basic Principles Decimal Structure Ten main classes Ten divisions in each main class Pure Arabic numbers
  • 8. 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
  • 9. What do you mean by shellfish? Shellfish: as Marine Animal ( Zoology) Shellfish as Public Health issue Shellfish as human food (Cookbook)
  • 10. 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.
  • 11. 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
  • 16. 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.
  • 17. 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.
  • 19. B BIO
  • 20. DRILL DOWN THROUGH SCHEDULES! LEVEL ONE LEVEL TWO LEVEL THREE LEVEL FOUR Image Source: Wikipedia
  • 21. Dewey Exercise Laws regarding loans Dictionaries, Encyclopedias, Concordances Hierarchy
  • 26. EXAMPLE 2 Dictionary of Biological terms