Dewey Decimal Classification DDC 22nd ed.

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Dewey Decimal Classification (DDC) (22nd ed.)
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Classification

• The act of organizing the universe of knowledge
  into some systematic order
• Establishing relationships among classes and
  subclasses and finer subdivisions
• Library classification systematic arrangement
  by subjects of books and other materials on
  shelves or of catalogues in a manner which is
  most useful to those who read or seek a definite
  piece of information

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DDC Classification

• Controlled vocabulary
• Hierarchy
• Notation (pure notation vs mixed notation)
• Suitable for browsing
• On shelves
• OPACs catalogues
• Internet (Vancouver Public Libraries)
• Synthetic/enumerative

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DDC main classes

• 000 Generalities 100 Philosophy
  Psychology 200 Religion 300 Social Science 400
  Language 500 Natural Science Mathematics 600
  Technology (applied sciences) 700 The Arts 800
  Literature rhetoric 900 Geography History

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DDC hierarchy example

• 300 Social sciences
• 390 Customs, etiquette, folklore
• 391 Costume and personal appearance
• 391.5 Hair styles
• 391.7 Jewelry

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Social Sciences
Sociology
Statistics
Political science
Economics
Land economics
Labour economics
Financial economics
Labour force And market
Workers of Specific age groups
Women workers
Conditions of employment
Hierarchical structure from general to specific
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Orientation to DDC 22

• 5 parts
• The classification itself is made up of 2 parts
• Main schedules, v.2-3
• Tables, v.1
• 3 aids to use
• Introduction and Manual v.1 includes glossary
• Index., v.4

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DDC synthesis

• DDC is partially enumerative and partially
  synthetic
• Two ways to synthesize DDC intro 8.1, v.1, pp.
  lii
• Tables
• Divide one section like another

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DDC synthesis

• Tables
• 6 main tables internal tables
• Can always use Table 1 once
• Can use other tables only with permission in main
  schedule or in Table 1
• Subdivision like another section
• Only as stipulated in the schedules

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Notes in DDC

• Notes are important because they provide
  information that is not obvious in the notational
  hierarchy
• Definition notes indicating the meaning of a
  class
• Scope notes determining the scope of the
  subject matter
• Class here notes lists major topics in a class
• Variant-name notes used for synonyms and near
  synonyms

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DDC tables

• Table1 Standard subdivisions
• Table 2 geographic areas , historical periods,
  persons
• Table 3-ASubdivisions for works by or about
  individual authors
• Table 3-BSubdivisions for works by or about more
  than one author
• Table3-C Notation to be added where instructed
  in Table 3-B, 700.4, 808 -809
• Table 4 subdivisions for individual languages
• Table 5 Racial, ethnic, national groups
• Table 6 Languages

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How to use tables

• Notations from table 1 may be used wherever
  applicable
• Notations from tables 2, 5, 6, and 7 are used
  only when instructed
• Table 3 and 4 apply only to certain schedules
• table 3 to the 800s and table 4 to 420-490

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Choosing a number

• Consider the usefulness
• Make subject the primary consideration
• Use the most specific number available
• Do not classify from the index alone
• Try to identify the dominant subject if the work
  is multitopical
• Fundamentals of physical chemistry for premedical
  students
• Chemical calculations An introduction to
  mathematics in chemistry

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Work through examples

• Foreign relations between Japan and Britain
  
• Base number for foreign relations between
• specific nations as listed under 327.3
  327.9
• 327
• Area notation for Japan
  
• 52
• Area notation for Britain
• 41
• As instructed, add area notation for one
  nation to the base number, add 0, and to the
  result add area notation for the other nation.
• The number is 327.52041

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• Descriptive research in Library Science
• 1. Number for library science
• 020
• 2. Standard subdivision for descriptive
  research
• -0 723
• Add Standard subdivision to the base
  number
• The number is 020.723

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• Geology of Finland
• 1. Base number
• Instruction to add area notation 4 to
  9 to base number
• 55
• 2. Area notation for Finland from Table 2
  
• -4 897
• Add (2) to (1) with decimal point inserted
• The number is 554.897

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• Commercial policy of the United States
• 1. Number for Commercial policy, with no direct
  provision for geographic subdivision
• 381.3
• 2. Standard subdivision for United states
• 093-099 geographic subdivision
• -0973
• Add (2) to (1)
• The number is 381.30973

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082 Dewey Decimal Call Number (R)

• Indicators
• First Type of edition
• 0 Full edition
• 1 Abridged edition
• Second Source of call number
• - No information provided
• 0 Assigned by LC
• 4 Assigned by agency other than LC
• Subfield Codes
• a Classification number (R)
• 2 Edition number (NR)

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Examples in MARC

• 082 04 a 779.95 2 22
• 082 04 a 020.723 2 22
• 082 04 a 554.897 2 22

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Example Pop music in Canada

• 781.63 Popular music
• 09 Historical, geographic, persons
  treatment
• 71 Canada (Table 2)
• Number 781.63 09 71

Geographic subdivision
Country number
Base number
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Useful resources

• WebDewey (http//connexion.oclc.org/ )
• LC subject Heading
• Dewey Classification Correlations
  (Classification Web)
• OCLC worldCat
• LIC Catalogue