Extensions to the Representation of the DDC in MARC 21 Formats Dewey Translators Meeting Tuesday, 12 August 2008 Ville de Québec, Canada Giles Martin

MARBI Discussion Paper and Proposal Representation of the Dewey Decimal Classification (DDC) System in MARC 21 Formats Discussion Paper 2007-DP06 (June 2007): Proposal (January 2008):

MARBI Committee MARBI (Machine-Readable Bibliographic Information)

Proposal MARC PROPOSAL NO NAME: Representation of the Dewey Decimal Classification (DDC) System in MARC 21 formats SOURCE: Dewey editorial team, Deutsche Nationalbibliothek, LC, and OCLC

Reasons for the proposal Conversion of the DDC Editorial Support System (ESS) to the MARC 21 Classification and Authority formats The German and Austrian communities’ converting to MARC 21 from the MAB format and needing several changes to the MARC 21 Bibliographic format related to the representation of DDC numbers.

Proposal Contents 1: Identification of internal add table numbers in the Authority and Classification formats 2: Revision of the 765 field in the Classification format 3: Classification number edition and source information in the Bibliographic and Classification formats 4: Designations for optional numbers in the Bibliographic format 5: Additional Dewey numbers for access in the Bibliographic format 6: Synthesized classification number components in the Bibliographic format 7: Segmentation information in the Classification format 8: Encoding topic information in some Classification format fields 9: Classification number hierarchy in the Classification Format

Proposal /1 Identification of internal add table numbers in the Authority and Classification formats 153 ## $a 290 $y 1 $a 071 $j Education [Notation 071 in the internal add table located at 290]

Proposal /2 Revision of the 765 field in the Classification format In field 765 in the Classification format, redefine subfield $c as: $c - Classification number--Ending number of span (R)

Proposal /3 Classification number edition and source information in the Bibliographic and Classification formats $a 004 $2 22/ger $q DE-101b [Edition is the German translation of Edition 22] [Assigning agency is the Deutsche Nationalbibliothek]

Proposal /4 Designations for optional numbers in the Bibliographic format $a A $2 22 $m b [The Dewey number is an option]

Proposal /5 Additional Dewey numbers for access in the Bibliographic format $a $ # $a $ # $z 2 $a 714 $2 22 [For a book on birds and mammals of Québec Province. The 082 field contains the number for Québec mammals. The first new field 083 contains the number for Québec birds. The second new field 083 contains the number for Québec Province.]

Proposal /6 Synthesized classification number components in the Bibliographic format $8 1 $a $ # $8 1.1 $b $a $r 333 $s # $8 1.2 $b $a $c $w $c $t 16 [ means law providing for government control and regulation of biological resources for the sake of conserving them. The first 085 field shows that was built with plus 95 from , following the instructions at The second 085 field shows that was built with plus 16 from the add table under , as instructed under ]

Proposal /7 Segmentation information in the Classification format 673 ## $a 025.4/ ## $i Segment as shown in $a $c $i, e.g., $a $i, $a /9 $i, $a /6

Proposal /8 Encoding topic information in some Classification format fields 680 1# $i An area is classed in its present number even if it had a different affiliation at the time under consideration, e.g., $t Arizona under Mexican sovereignty $z 2 $a 791 $i (not $z 2 $a 72) 683 0# $i In building numbers, do not add by use of 0 or 1 (alone or in combination) more than twice, e.g., $t history of rock protest songs $a $i (not $a ) 761 #0 $i Add to base number $b $i notation $z 2 $d 1 $c 9 $i from Table 2, e.g., $t acquisition of materials from Latin America $e

Proposal /9 Classification number hierarchy in the Classification Format 153 ## $z 2 $a 73 $z 2 $e 7 $j United States [Notation 73 in Table 2 is under notation 7]