1. Dewey Numbers in Authority Files
Dewey Translators Meeting
16 August 2005
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
IFLA 2006

2. Subject Heading/DDC Mappings
Dewey Translators Meeting
16 August 2005
Subject Heading/DDC Mappings
Based on likelihood of use of heading with number
No explicit definition of relationship beyond concurrent use
IFLA 2006

3. Dewey Numbers in Subject Heading Authority Records
Dewey Translators Meeting
16 August 2005
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
IFLA 2006

4. Guidelines for Inclusion of LCC in LCSH (H365)
Dewey Translators Meeting
16 August 2005
Guidelines for 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
IFLA 2006

5. Proposed General Guidelines for DDC in LCSH
Dewey Translators Meeting
16 August 2005
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
IFLA 2006

6. Example 1-1: Approximates the Whole
Dewey Translators Meeting
16 August 2005
Example 1-1: Approximates the Whole
150 ## $aEducation
$a370
180 ## $aEducation
$z1$a071
“Education” is caption at 370 Education and T1—071 Education
IFLA 2006

7. Example 1-2: Approximates the Whole
Dewey Translators Meeting
16 August 2005
Example 1-2: Approximates the Whole
150 ## $aSociology in literature
$z3C$a3552
“Sociology” is in caption at T3C—3552 Sociology and anthropology; standard subdivisions added for either or both topics in heading
150 ## $aEmotional intelligence
$a152.4
“Emotional intelligence” is in class-here note under Emotions
IFLA 2006

8. Example 1-3: Approximates the Whole
Dewey Translators Meeting
16 August 2005
Example 1-3: Approximates the Whole
150 ## $aKhoisan (African people)
$z5$a961
“Khoisan (African people)” is index term at T5—961 Khoikhoi and San and approximates whole of class
IFLA 2006

9. Example 2-1: Explicitly in Standing Room
Dewey Translators Meeting
16 August 2005
Example 2-1: Explicitly in Standing Room
150 ## $aViolence in literature
$z3C$a3552
“Violence” is in including note at T3C—3552
IFLA 2006

10. Example 2-2: Explicitly in Standing Room
Dewey Translators Meeting
16 August 2005
Example 2-2: Explicitly in Standing Room
150 ## $Pipil language
$z6$a97452
“Pipil language” (a specific Aztecan language) is index term at T6—97452 Aztecan languages
IFLA 2006

11. Example 3: Geographic Exception
Dewey Translators Meeting
16 August 2005
Example 3: Geographic Exception
151 ## $aGarrett County (Md.)
$z2$a75297
“Garrett County” is caption at T2—75297
151 ## $aOakland (Garrett County, Md.)
“Oakland” not mentioned in record, but city in Garrett County
IFLA 2006

12. Example 4: Multiple Numbers Added to Record
Dewey Translators Meeting
16 August 2005
Example 4: Multiple Numbers Added to Record
151 ## $aCookies $a $a
IFLA 2006

13. Example 5: No Number Added to Record
Dewey Translators Meeting
16 August 2005
Example 5: No Number Added to Record
150 ## $aBohemianism in literature
Mapped to T3C—3552, but “Bohemianism” not explicitly in record or index entries for T3C—3552
IFLA 2006

14. Dewey Translators Meeting
16 August 2005
Discussion
Are the guidelines generalizable to other subject heading systems?
Do we need additional definitions of relationships within Dewey records?
IFLA 2006