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Dewey Decimal Classification (DDC)

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Presentation on theme: "Dewey Decimal Classification (DDC)"— Presentation transcript:

1 Dewey Decimal Classification (DDC)
LIS Winter Session 9

2 Classification - Definition
Organizing the universe of knowledge into some systematic order Establishing relationships among classes, subclasses, and finer subdivisions of concepts Library classification: The systematic arrangement, by subject(s), of materials on shelves and/or in catalogues, in a manner that is (potentially) useful to library users.

3 DDC - Characteristics Is a controlled vocabulary Is hierarchical
Uses mixed notation Some classification numbers are precoordinated (i.e., already built) Some classification numbers are postcoordinated (i.e., must be built)

4 DDC - Main classes 000 Generalities 100 Philosophy & Psychology 200 Religion 300 Social Science 400 Language 500 Natural Science & Mathematics 600 Technology (Applied Sciences) 700 Arts 800 Literature & Rhetoric 900 Geography & History

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

6 DDC Hierarchy - Example
Social sciences Customs, etiquette, folklore Costume and personal appearance Hair styles Jewelry

7 DDC 22 - Overview of Sections
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

8 DDC tables Table1: Standard subdivisions
Table 2: Geographic areas , historical periods, persons Table 3-A: Subdivisions for works by or about individual authors Table 3-B: Subdivisions for works by or about more than one author Table3-C: Notation to be added where instructed in Table 3-B, 700.4, Table 4: Subdivisions for individual languages Table 5: Racial, ethnic, national groups Table 6: Languages

9 DDC Synthesis Tables Subdividing in the manner of another section:
6 main tables + internal tables Can (almost) always use Table 1 once Can use other tables only with permission in main schedule, or as directed by Table 1 Subdividing in the manner of another section: Only as stipulated in the schedules

10 How to use tables Notations from Table 1 may be (generally) used wherever applicable Notations from tables 2, 5, and 6 are used only when instructed Table 3 and 4 apply only to certain schedules (i.e., table 3 to the 800s and table 4 to )

11 Notes in DDC Notes are important because they provide information that is not obvious in the notation 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

12 Choosing a number Basic principle: Classification by discipline
Fundamentals of physical chemistry for premedical students Chemical calculations: An introduction to mathematics in chemistry Consider utility of the number in the context of the aboutness of the information package Use the most specific number available Do not classify from the index alone Try to identify the dominant subject if the work is multi-topical

13 Foreign relations between Japan and Britain
Example Work in hand is chiefly about: Foreign relations between Japan and Britain 1. Locate base number for international relations: 327. 2. Consider more specific numbers in the hierarchy: Foreign relations of specific continents and localities … foreign relations of specific countries: 3. Read classification notes: Class here foreign policy Add to base number 327 notation T2--3-T2--9 from Table 2 , e.g., foreign relations of Brazil , of eastern European countries , in Middle East ; then, for relations between that nation or region and another nation or region, add 0* and to the result add notation T2--1-T2--9 from Table 2, e.g., relations between Brazil and France , between Brazil and Arab world 4. Construct number: decimal + area notation for Japan = area notation for Britain =

14 Descriptive research in Library Science
Example Work in hand is chiefly about: Descriptive research in Library Science 1. Locate base number for library science: 020. 2. Consider more specific numbers in the hierarchy: Library and information sciences 020.7    Education, research, related topics    Library research 3. Recognize that the standard subdivision 72 is derived from Table 1. Check for a more specific notation: T1--0      Table 1. Standard Subdivisions T1--07    Education, research, related topics T   Research; statistical methods  T1— T1—0724 Specific kinds of research T1—0722 Historical research  T Descriptive research  4. Construct number: decimal =

15 Example Work in hand is chiefly about: Geology of Finland
Locate base number: 500   Science  550   Earth sciences & geology 550   Earth sciences  551   Geology, hydrology, meteorology  552   Petrology  553    Economic geology   Earth sciences by specific continents, countries, localities in modern world; extraterrestrial worlds 554          Earth sciences of Europe 

16 Example 2. Review classification notes:
Number built according to instructions under Add to base number 55 notation T2--4-T2--9 from Table 2 , e.g., geology of Japan , of moon 3. Locate area notation, from Table 2, for Finland: T2--0      Table 2. Geographic Areas, Historical Periods, Persons T2--3-T2--9    Specific continents, countries, localities; extraterrestrial worlds T2--4-T2--9    Modern world; extraterrestrial worlds T2--4              Europe    Western Europe T2--48            Scandinavia  T          Denmark and Finland T T Denmark  T                  Finland  4. Construct number: decimal =

17 Commercial policy of the United States
Example Work in hand is chiefly about: Commercial policy of the United States 1. Locate number for commercial policy 300 Social sciences 380  Commerce, communications & transportation 381 *Commerce (Trade) [formerly 380.1]  Commercial policy 2. Recognize that there is no explicit provision for geographic subdivision, but that you can use standard subdivisions in Tables 1 and 2 to add subdivision for the United states: a. Instructions in Table 1: Add to base number T1--09 notation T2--3-T2--9 from Table 2 , e.g., the subject in North America T , in Brazil T

18 Example b. Instructions in Table 2:
T Table 2. Geographic Areas, Historical Periods, Persons T2--3-T Specific continents, countries, localities; extraterrestrial worlds T2--4-T2--9   Modern world; extraterrestrial worlds T2--7            North America  T2--73           United States 3. Construct the number: decimal (T1) + 73 (Table 2) =

19 Example: Pop music in Canada
Popular music 09 Historical, geographic, persons treatment Canada (Table 2) Number: Geographic subdivision Country number Base number

20 082 – 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)

21 Coding DDC class number in MARC

22 Course and Assignment Resources
WebDewey (http://connexion.oclc.org/ ) Dewey Classification Correlations (Classification Web) OCLC WorldCat LC Catalogue


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