The document discusses the history and features of the 23rd edition of the Dewey Decimal Classification system. It provides details on the system's development since 1876, its structure involving 10 main classes and use of decimals, and new features in the 23rd edition like representation of groups of people, revisions to standard subdivisions, and changes to better organize knowledge on the internet.

1. DDC 23th EditionDDC 23th Edition
&&
It's Salient FeaturesIt's Salient Features
(Presented by)
Murchana Borah
Milisha D'silva

2. ContentContent
● Introduction
● History of DDC
● Meaning of DDC
- Structure
- Division
- Tables
- Ten Main Classes
- Notation
- Principle of Hierarchy
● DDC 23th Edition
● Structure
● Features
● Future

3. IntroductionIntroduction
● The 1st edition of DDC-devised by Melvil Dewey- came
in 1876.
● The publication of a 42-pages pamphlet entitled 'A
classification and subject index for cataloging and
arranging the books and pamphlets of a library'
● The first edition was consisted of;
- 12 pages of preparatory matter,
- 12 pages of tables, and
- 18 pages of index
● It contained nearly 1000 classes.

4. HistoryHistory
● DDC was conceived by Melvil Dewey in 1873.
● It was first published in 1876.
● It is published in full and abridged edition by OCLC.
● OCLC owns all copyrigts in the DDC and licenses the
system for a variety of uses.
● It is most widely used classification system in the world.
● Translated into over thirty languages.
● Its greatest strenght is that system is developed and
maintained in a national bibliographic agency, the library
of congress.

5. Meaning of DDCMeaning of DDC
● DDC is the knowledge classification scheme where in
subjects are divided into ten main classes (numbered
000-999 i.e Generalities to History and Geography), and
subdivisions within a particular subject are indicated by
decimals.
● Arrangement is done as per discipline.
● Useful to organise knowledge in any form.
● Facilitates browsing

6. Structure of DDCStructure of DDC
● Presented in DDC summeries in the begning of
volume 2.
➔ First summary: ten main classes
➔ Second summary: hundred divisions
➔ Third summary: thousand sections

7. Division of DDCDivision of DDC
● Volume 1 : Tables and manual.
● Volume 2 : summaries and Schedules ( 000-500).
● Volume 3 : Schedules (600-900).
● Volume 4 : Relative Index.

8. TablesTables
● T1- Standard Subdivisions
● T2- Geographic Areas, Historical Periods, Biography
● T3- Subdivisions for the Arts, for Individual literatures,
for specific literary forms
➢ T3A- Subdivisions for works by or about individual
authors
➢ T3B- subdivisions for works by or about more then one
author
➢ T3C- Notation to added where instructed in T3B
● T4- Subdivisions for Individual Language and Language
families
● T5- Ethnic and National Groups
● T6- Languages

9. Ten Main ClassesTen Main Classes
● 000- General works, computer science and information
● 100- Philosophy and psychology
● 200- Religion
● 300- Social Science
● 400- Language
● 500- Science
● 600- Technology
● 700- Arts and Recreation
● 800- Literature
● 900- History and Geography

10. NotationNotation
● Arabic numbers are used to represent each class in
DDC.
● It gives both the unique meaning of class and its
relation to other classes.
● Uses convention that no number should have fewer
than three digits; zeros are used to fill out numbers
● Decimal Point or dot.

11. Principle of Hierarchy Principle of Hierarchy
● Structural hierarchy: all topics are part of all the broader
topics above them
● Notational Hierarchy: expressed by lenght of notation.

12. DDC 23th EditionDDC 23th Edition
● The 23rd edition of DDC was released in May 2011;
● It is the product of a new approach to development of
print editions of the Dewey Decimal Classification.
● It was prepared in the context of the web;
● By-product of the underlying database;instead of as the
sole focus of editorial development.

14. FeaturesFeatures
Overall features of DDC 23th edition includes:
➢ Representation of groups of people;
➢ Revisions to several standard subdivisions;
➢ Updates throughout the tables and schedules;
➢ Structural changes;
➢ New editorial support system;
➢ Different data format;
➢ New data distribution mode.

15. STRUCTURAL CHANGESSTRUCTURAL CHANGES
1. Elimination of dual headings
004–006 Computer science
004–006 Data processing Computer science
570 Biology
570 Life sciences Biology
943 Germany and neighboring central European countries
943 Central Europe Germany

16. Continue...Continue...
2. No unbalanced spans in the schedules
and tables
305.805–.809
and
305.81–.89.
305.805–.89 Specific ethnic and national groups

17. DATA REPRESENTATIONDATA REPRESENTATION
1.Editorial Support System (ESS), 2010
2.MARCXML Format
First,from proprietary format to MARC 21
formats for Classification and Authority data.
Second, representation from the internal
MARC formats to a MARCXMl representation
3. WebDewey 2.0

18. WebDewey 2.0

19. GROUPS OF PEOPLEGROUPS OF PEOPLE
1. “Kinds of persons” to “Groups of people”
T1—08 Groups of people
305 Groups of people
2.“Persons treatment” to “Biography”
T1—09 History, geographic treatment, biography
Table 2 Geographic areas, historical periods,
biography

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3. Consistent use of “people” against “persons”.
For example: In Related Index,
“Person” = Person (Legal concept)
Persons (Individuals)
People
The index term for groups of people in general is “People”; the
general index term for individuals is “Persons (Individuals).”
4. Ripple effect of changes throughout DDC 23,
especially for groups of people in 155, 305–306,
331, and 362

21. STANDARD SUBDIVISIONSSTANDARD SUBDIVISIONS
1. Note “Notation 0X from Table 1 as modified below” - to
highlighting special expansions under
standard subdivisions
Ex- 401.4 Communication; semantics, pragmatics,
languages for special purposes
Notation 014 from Table 1 as modified below
2. Special provisions; not Standard Subdivision - an
added note appears under the 'special provision' if
addition in parallel to the standard Table 1 provision is
desired.
Ex- Revision to internal table under T1—08, T1—0901–
0905, and T1—093–099

22. Continue...Continue...
3. Standard subdivisions without initial 0
Ex: Contents of table under T3B—1–8 moved to
subdivisions of T3B—1 Poetry

23. UPDATES : TABLESUPDATES : TABLES
● Table 2: Significant expansion in Ancient world,Italy,
Switzerland, Sweden, Finland, Turkey, Indonesia,
Vietnam, and Canada
● Table 3C: Significant expansion in —3 Arts and
literature—3 Arts and literature dealing with specific
themes and subjects that draws the notation in closer
alignment with parallel subjects in 001–999
● Table 4: Special expansion under —014
Communication; semantics, pragmatics, languages for
special purposes
● Tables 5 and 6: Featured expansions for peoples and
languages, respectively.

24. UPDATES : SCHEDULESUPDATES : SCHEDULES
● 000 Computer science, information & general works
> 004.11-004.16 Digital computers
● 100 Psychology and Philosophy
155 Differential and development psychology
160 & 513 Logic and Symbolic logic
● 200 Religion
281.9 Orthodox church
297 Islam

25. ● 300 Social sciences
371.05 Public schools distinguished by source of
funding,locus of control, and mandate
390 Provision for food and clothing in
Customs, etiquette, folklore
● 400 Language
427[.1–.8] Geographic variations in parts of England
427.94-.99 Geographic variations in specific
continents, countries, localities in modern
world
● 500 Science
511.314 Modal logic
511.317 Conditional logic
511.318 Probabilistic logic

26. ● 600 Technology
690 “Buildings” → “Construction of
buildings”
690.3 Special topics of buildings
690.4 Specific parts of buildings
● 700 Art and Creation
741.5 Comic books, graphic novels,
fotonovelas,cartoons, caricatures, comic strips
777 Cinematography and Videography
● 800 Literature
808.025 Plagiarism
808.03 Specific elements of rhetoric
● 900 History and Geography
909.83 21st century, 2000–2099
930 History of ancient world to ca. 499

27. FutureFuture
● The next edition, i.e., DDC-24 is likely to be
published in 2018 to continue the changes hinted
in DDC-23
● As evinced by the two previous editions the DDC is moving
towards internationalisation by gradually removing White, Anglo-
Saxon and Protestant (WASP) bias
● Facet structure is becoming transparent with a capability to hold
together many facets in a single class number.
● Efforts have been made to design and market many Dewey
products, such as bookmarks, AV teaching kit, Guides to the full,
abridged and electronic versions of the DDC, and Dewey posters
and exclusive publication of three main summaries.

28. ● Research is going on to find wider applications of the DDC in all
sorts of information management.
● Organise information on the internet.
● Some of the question currently addressed to the DDC are:
- How can the classification be made more effective
for classifiers?
- How a standard English language classification
be built that also meets the needs of international
users?
- How to make DDC more effective in OPACs?
- How can the classification be made more useful
for the end-users?
- What can be done to make the DDC constantly
relevant in the future?

29. ReferencesReferences
● Contributors. (2012). Expansions from DDC 22 to DDC 23. Retrieved
September 30, 2015, from
http://ddc.typepad.com/025431/2012/02/expansions-from-ddc-22-to-ddc-23.ht
ml
● Mitchell, J. S. (2011). DDC 23: An Overview. Retrieved September 30, 2015,
from
http://webcache.googleusercontent.com/search?q=cache:wtN1SScPqXcJ:www.u
nivie.ac.at/voeb/fileadmin/Dateien/Kommissionen/Sacherschliessung/DDC23
_Overview_-_Mitchell.pdf+&cd=5&hl=en&ct=clnk&gl=in&client=ubuntu
● K, S. (2013). Short Notes about DDC. Retrieved September 30, 2015, from
http://newonlinelibrary.blogspot.in/2013/07/short-notes-about-ddc.html
● New Features in Edition 23. (2011). Retrieved September 30, 2015, from
http://webcache.googleusercontent.com/search?q=cache:5TO7OfY4ebgJ:https:
//www.oclc.org/content/dam/oclc/dewey/versions/print/new_features.pdf+&c
d=2&hl=en&ct=clnk&gl=in&client=ubuntu

30. ● Dewey Decimal Classification - FAQ. (n.d.). Retrieved September 30, 2015,
from http://staff.oclc.org/~dewey/dewey.htm
● Australia, E. S. (n.d.). Dewey Decimal Classification - edition 23. Retrieved
from
http://www2.curriculum.edu.au/scis/connections/issue_79_2011/articles/dewey
_decimal_classification_-_edition_23.html