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

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

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

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

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

Example 1-1: Approximates the Whole Dewey Translators Meeting 16 August 2005 Example 1-1: Approximates the Whole 150 ## $aEducation 083 00 $a370 180 ## $aEducation 083 00 $z1$a071 “Education” is caption at 370 Education and T1—071 Education IFLA 2006

Example 1-2: Approximates the Whole Dewey Translators Meeting 16 August 2005 Example 1-2: Approximates the Whole 150 ## $aSociology in literature 083 00 $z3C$a3552 “Sociology” is in caption at T3C—3552 Sociology and anthropology; standard subdivisions added for either or both topics in heading 150 ## $aEmotional intelligence 083 00 $a152.4 “Emotional intelligence” is in class-here note under 152.4 Emotions IFLA 2006

Example 1-3: Approximates the Whole Dewey Translators Meeting 16 August 2005 Example 1-3: Approximates the Whole 150 ## $aKhoisan (African people) 083 00 $z5$a961 “Khoisan (African people)” is index term at T5—961 Khoikhoi and San and approximates whole of class IFLA 2006

Example 2-1: Explicitly in Standing Room Dewey Translators Meeting 16 August 2005 Example 2-1: Explicitly in Standing Room 150 ## $aViolence in literature 083 00 $z3C$a3552 “Violence” is in including note at T3C—3552 IFLA 2006

Example 2-2: Explicitly in Standing Room Dewey Translators Meeting 16 August 2005 Example 2-2: Explicitly in Standing Room 150 ## $Pipil language 083 00 $z6$a97452 “Pipil language” (a specific Aztecan language) is index term at T6—97452 Aztecan languages IFLA 2006

Example 3: Geographic Exception Dewey Translators Meeting 16 August 2005 Example 3: Geographic Exception 151 ## $aGarrett County (Md.) 083 00 $z2$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

Example 4: Multiple Numbers Added to Record Dewey Translators Meeting 16 August 2005 Example 4: Multiple Numbers Added to Record 151 ## $aCookies 083 00 $a641.8654 083 00 $a664.7525 IFLA 2006

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

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