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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 (2013 version):
·
29.0%
refer to chemical compounds and drugs (D category), both exogenous and
endogenous;
·
23.1%
of the total are anatomical terms (A category), organisms (B category) and
phenomena and processes (G category);
·
14.6%
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 24.8%;
·
Public
Health (SP category) is represented by 11.1%, Homeopathy (HP category) by 6.2%,
Health Surveillance (VS category) by 2.6%, and Science and Health (SH
category) by 0.7%. These last four categories were especially developed to
better represent the literature generated in the countries of the region.
Updated: March, 2013
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