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Overview
of DeCS's tree structure
DeCS follows the tradition of the classification
systems and their respective subject heading lists which have been
transformed into specialized vocabularies without, however, changing the
structures of the classification systems from which they originated. Its tree structure is
well-grounded in the division of knowledge in decimal classes and
subclasses respecting their conceptual and semantic relationships, and its
terms are presented in a hybrid structure of pre- and post-coordination.
See also the qualifier hierarchical tree.
DeCS vocabulary concepts are distributed as
follows (2012 version):
·
26.3%
refer to chemical compounds and drugs (D category), both exogenous and
endogenous;
·
20.7%
of the total are anatomical terms (A category), organisms (B category) and
phenomena and processes (G category);
·
13.3%
of the total refer to diseases (C category);
·
categories
such as techniques and equipment (E category), allied sciences (F, H, I, J,
K, L, M and N categories), publication characteristics (V category) and
geographic locations (Z category) altogether represent 20.7%;
·
Public
Health (SP category) is represented by 10.1% of the total, Homeopathy (HP
category) by 5.6%, Environmental Health (VS category) by 2.4%, and Science
and Health (SH category) by 0.6%. These last four categories were especially
developed to better represent the literature generated in the countries of
the region.
Date of last update: 02/2012
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