Back to Index

decimal in Medak, Mars & WHW 2015

wenty-four, he had
already published the first of nineteen editions of
A Classification and Subject Index for Cataloguing
and Arranging the Books and Pamphlets of a Library,06 the classification system that still bears its
author’s name: the Dewey Decimal System. Dewey
had a dream: for his twenty-first birthday he had
announced, “My World Work [will be] Free Schools
and Free Libraries for every soul.”07
05 Richard F. Snow, “Melvil Dewey”, American Heritage 32,
no. 1 (December 1980),
http://www

, Project Gutenberg e-book 12513 (2004),
http://www.gutenberg.org/files/12513/12513-h/12513-h.htm.
07 Snow, “Melvil Dewey”.

Public library (essay)

77

His dream came true. Public Library is an entry
in the catalog of History where a fantastic decimal08
describes a category of phenomenon that—together
with free public education, a free public healthcare,
the scientific method, the Universal Declaration of
Human Rights, Wikipedia, and free software, among
others—we, the people, are most proud o

ical mass of people with access to
the internet. Today nobody lacks the imagination
necessary to see public libraries as part of a global infrastructure of universal access to knowledge
for literally every member of society. However, the
08 “Dewey Decimal Classification: 001.”, Dewey.info, 27 October 2014, http://dewey.info/class/001/2009-08/about.en.

78

M. Mars • M. Zarroug • T. Medak

emergence and development of the internet is taking place precisely at the point at which an institutional

to choose a universal
classification and to recommend it as such in the
same way that the French Convention recognized
the necessity of a universal system of weights and
measures. In 1895 the first International Conference
of Bibliography chose the Decimal Classification
and adopted a complete plan for its development. In
1904, the edition of the expanded tables appeared. A
new edition was being prepared when the war broke
out Brussels, headquarters of the International Institute of Bibliography, which was doing this work,
was part of the invaded territory.
In its latest state, the Decimal Classification has
become an instrument of great precision which
can meet many needs. The printed tables contain
33,000 divisions and they have an alphabetical index consisting of about 38,000 words. Learning is
here represented in its entire sweep:

with the complex expressions which one finds in the modern terminology of disciplines like medicine, technology,
and the social sciences. Above all, it is impossible
to achieve any international cooperation on such
a national basis as language. The Decimal Classification is a vast systematization of knowledge, “the
table of contents of the tables of contents” of all

94

Paul Otlet

treatises. But, as it would be impossible to find a
particular subject’s relative place by reference to
another subject, a system of numbering is needed.
This is decimal, which an example will make clear.
Optical Physiology would be classified thus:
5 th Class
3rd Group
5th Division
7th Sub-division

Natural Sciences
Physics
Optics
Optical Physiology

or 535.7
This number 535.7 is called decimal because all
knowledge is taken as one of which each science is
a fraction and each individual subject is a decimal
subdivided to a lesser or greater degree. For the sake
of abbreviation, the zero of the complete number,
which would be 0.5357, has been suppressed because
the zero would be repeated in front of each number.
The numbers 5, 3, 5, 7 (which one could ca

rty-five point seven and which could
be arranged in blocks of three as for the telephone,
or in groups of twos) form a single number when
the implied words, “class, group, division and subdivision,” are uttered.
The classification is also called decimal because
all subjects are divided into ten classes, then each
of these into at least ten groups, and each group
into at least ten divisions. All that is needed for the
number 535.7 always to have the same meaning is
to translate the tables into all languages. All that is
needed to deal with future scientific developments

Transformations In The Bibliographical
Apparatus Of The Sciences

95

in optical physiology in all of its ramifications is to
subdivide this number by further decimal numbers
corresponding to the subdivisions of the subject
Finally, all that is needed to ensure that any document or item pertaining to optical physiology finds
its place within the sum total of scientific subjects
is to write this number on it In the alphabetic index
to the tables references are made from each word
to the classification number just as the index of a
book refers to page numbers.
This first remarkable principle of the decimal
classification is generally understood. Its second,
which has been introduced more recently, is less
well known: the combination of various classification numbers whenever there is some utility in expressing a compound or complex heading. In the
soci

ibliographie de la France,
21 December 1917. — La Réorganisation du Catalogue international de la littérature scientifique. Revue générale des
sciences, IS February 1918. The publications of the Institute,
especially the expanded tables of the Decimal Classification,
have been deposited at the Bureau Bibliographique de Paris,
44 rue de Rennes at the apartments of the Société de l’encouragement. — See also the report presented by General
Sebert (9] to the Congrès du Génie civil, in March 19

After the Library

127

formalization of a universal system of classification
of objects in the library with the relative location of
objects and re-arrangeable index that would then in
1876 receive its present standardized form in Melvil
Dewey’s Decimal System.
The development of the library as an institution of
public access and popular literacy did not proceed
apace with the development of its epistemic aspects.
It was only a series of social upheavals and transformations in the course of the 18th

decimal in Constant 2016

ia and comes with many assumptions about the kind of connections and
practices that are desirable. We wanted to work with Semantic extensions specifically
because we were interested in the way The Semantic Web[7] seemed to resemble Otlet's
Universal Decimal Classification system. At many moments we felt ourselves going down
rabbit-holes of universal completeness, endless categorisation and nauseas of scale. It made
the work at times uncomfortable, messy and unruly, but it allowed us to do the work of
un

egion alone. They also
indicate how party politics is increasingly confined to the periphery of other forms of power
and therefore struggle to assure themselves a strategic positioning.
C. 025.45UDC; 161.225.22; 004.659GOO:004.021PAG.

The Universal Decimal Classification[21] system, developed by Paul Otlet and Henri
Lafontaine on the basis of the Dewey Decimal Classification system is still considered one of
their most important realizations as well as a corner-stone in Otlet's overall vision. Its
adoption, revision and use until today demonstrate a thoughtful and successful approach to
the classification

act express whole sentences and
statements in UDC format[22]. The fundamental idea behind it [23]was that books and
documentation could be broken down into their constitutive sentences and boiled down to a
set of universal concepts, regulated by the decimal system. This would allow to express
objective truths in a numerical language, fostering international exchange beyond translation,
making science's work easier by regulating knowledge with numbers. We have to understand
the idea in the time it was originally conceived, a time shaped by positivism and the belief in
the unhindered potential of science to obtain objective universal knowledge. Today,
especially when we take into account the arbitrariness of the decimal structure, it sounds
doubtful, if not preposterous.
However, the linguistic-numeric element of UDC which enables to express fundamental
meanings through numbers, plays a key role in the oeuvre of Paul Otlet. In his work we learn
that numerical knowle

Education: The Graphic and Scenographic Transformation of the
Universal Encyclopaedia in the Work of Paul Otlet, Patrick Geddes, and Otto Neurath.” Perspectives on Science 19, no. 1
(January 19, 2011): 68-69.
20. Ibid: 66.

P.176

P.177

21. The Decimal part in the name means that any records can be further subdivided by tenths, virtually infinitely, according to an
evolving scheme of depth and specialization. For example, 1 is “Philosophy”, 16 is “Logic”, 161 is “Fundamentals of Logic”,

d War I and creation of the Societé
28
Des Nations (SDN) that will later become
the United Nations (UN).

WORLD

ASSOCIATION NATION

1924

Creation (within the IIB), of the Central
Classification Commission focusing on
development of the Universal Decimal
Classification (UDC).

1931

The IIB becomes the International
Institute of documentation (IID) and
in 1938 and is named International
Federation of documentation (IDF).

ASSOCIATION WORLD

1934

Publication of Otlet's book Traité de
documentation.

removed all dross and
foreign elements, will be set out in a quite analytical way.
It will be recorded on separate leaves or cards rather than
being confined in volumes,” which will allow the
standardized annotation of hypertext for the Universal
Decimal Classification (UDC).[11] Furthermore, the
“regulation through architecture and its tendency of a
total urbanism would help towards a better understanding
of the book Traité de documentation and it's right
functional and holistic desiderata.”[12

somuch that
this ship became a
standing example among
the philosophers, for the
logical question of things
that grow; one side holding
that the ship remained the
same, and the other
contending that it was not
the same.

P.283

[14]

[15]

Universal Decimal
Classification: hierarchy

World City by Le
Corbusier & Jeanneret

Paul Otlet personal
papers. Picture taken
during a Mondotheque
visit of the Mundaneum
archives, 11 September
2015

The face of the earth
"Alimentation. — La base
would be much alter

Display 200 300 400 500 600 700 800 900 1000 ALL characters around the word.