Dewey Numbers in Authority Files

1
Dewey Numbers in Authority Files

• Joan S. Mitchell
• Editor in Chief, DDC
• OCLC
• Dewey Translators Meeting
• 23 August 2006
• IFLA World Library and Information Congress 2006
• Seoul

2
Subject Heading/DDC Mappings

• Based on likelihood of use of heading with number
• No explicit definition of relationship beyond
  concurrent use

3
Dewey Numbers in Subject Heading Authority
Records

• Subject entity represented by heading
  approximates the whole of the DDC class or is in
  standing room
• Definition of relationship between heading and
  number is found in Dewey number record

4
Guidelinesfor Inclusion of LCC in LCSH(H365)

• Caption for number identical/nearly identical in
  scope
• Topic explicitly mentioned in Including note
• Topic belongs to category for which it is LC
  policy to classify works at number broader than
  subject heading

5
Proposed General Guidelines for DDC in LCSH

• Subject entity represented by LCSH approximates
  whole of DDC class
• Subject entity represented by LCSH is explicitly
  in standing room at the number (see geographic
  and biological exceptions)
• Geographic area is implicitly in standing room at
  the number
• Genus/species is implicitly in standing room at
  the number

6
Example 1-1 Approximates the Whole

• 150 aEducation
• 083 00 a370
• 180 aEducation
• 083 00 z1a071
• Education is caption at 370 Education and
  T1071 Education

7
Example 1-2 Approximates the Whole

• 150 aSociology in literature
• 083 00 z3Ca3552
• Sociology is in caption at T3C3552 Sociology
  and anthropology standard subdivisions added for
  either or both topics in heading
• 150 aEmotional intelligence
• 083 00 a152.4
• Emotional intelligence is in class-here note
  under 152.4 Emotions

8
Example 1-3 Approximates the Whole

• 150 aKhoisan (African people)
• 083 00 z5a961
• Khoisan (African people) is index term at
  T5961 Khoikhoi
  and San and approximates whole of class

9
Example 2-1 Explicitly in Standing Room

• 150 aViolence in literature
• 083 00 z3Ca3552
• Violence is in including note at T3C3552

10
Example 2-2 Explicitly in Standing Room

• 150 Pipil language
• 083 00 z6a97452
• Pipil language (a specific Aztecan language) is
  index term at T697452 Aztecan languages

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Example 3 Geographic Exception

• 151 aGarrett County (Md.)
• 083 00 z2a75297
• Garrett County is caption at T275297
• 151 aOakland (Garrett County, Md.)
• 083 00 z2a75297
• Oakland not mentioned in record, but city in
  Garrett County

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Example 4 Multiple Numbers Added to Record

• 151 aCookies
• 083 00 a641.8654
• 083 00 a664.7525

13
Example 5 No Number Added to Record

• 150 aBohemianism in literature
• Mapped to T3C3552, but Bohemianism not
  explicitly in record or index entries for
  T3C3552

14
Discussion

• Are the guidelines generalizable to other subject
  heading systems?
• Do we need additional definitions of
  relationships within Dewey records?