Page 103 - JOURNAL OF LIBRARY SCIENCE IN CHINA 2018 Vol. 42

102 Journal of Library Science in China, Vol. 8, 2016

extent, were the specialization, supplement and modification of CT knowledge framework.
Consequently, knowledge systems in later thesauri are good succession of CT, as well as their
macrostructure and description patterns of microstructure. It can be seen that CT is enormously
large and universally applicable. It covers a wide range of disciplines in social sciences, natural
sciences, engineering, and technologies, and it has the largest term collections. Thus, CT is capable
of covering existing thesauri in magnitude and specifics of concept schemes.
(2) CT has been maintained and utilized better
From a holistic perspective, the Chinese thesauri have not been maintained properly and not truly
used widely. Most thesauri have never been revised, and their knowledge systems are expected
to be updated. However, it is very unlikely that the copyright owner and original developer can
construct and maintain the thesauri. Therefore, these thesauri can be considered and used as
supplements to CT, instead of providing services and being used independently. Comparatively,
CT has been maintained properly. The first edition CT was published in 1980, which contained 109
thousand terms in total. In 1991, a partially revised version of CT was published, which covered
natural sciences, engineering and technologies, and contained 81 thousand terms. In 2014, a new
edition of CT was published focusing on engineering and technology. In order to meet the demands
of automatic information processing, this newest version has increased the amount of terms, to a
total of 360 thousands (Institute of Scientific and Technical Information of China, 2014). In 2015,
a revise project of natural science section of CT was initiated.
For the reasons above, NTW adopts the integration mode of using CT as a mapping center,
which other thesauri are mapped to it. As shown in Figure 1, the architecture of NTW has three
layers: data acquisition and transformation layer, storage and semantic integration layer, and
service and application layer.

%BUB "DRVJTJUJPO 4UPSBHF 4FNBOUJD *OUFHSBUJPO 4FSWJDF "QQMJDBUJPO
5SBOTGPSNBUJPO

6OJGPSN %FTD 5PQ $MBTTJGJDBUJPO 5PQ 0OUPMPHZ UIF 5IJSE 1BSUZ
4PVSDF " SJQUJPO 'PSNBU *OWPLJOH 4FSWJDF
5SBOTGPSNBUJPO
5IFTBVSVT $VTUP
5IFTBVSVT NJ[BUJPO 4FSWJDF
" $IJOFTF
%BUB *NQPSUJOH 5IFTBVSVT $PODFQU $PODFQU
4PVSDF # 7FSJGJDBUJPO 5IFTBVSVT (SPVQ TFSWJDF
# 5IFTBVSVT .FUBEBUB
5IFTBVSVT
$ 4FSWJDF
4PVSDF $ .FUBEBUB
3FHJTUSBUJPO 4FBSDI #SPXTF &EJU
%PXOMPBE
#BTJD -FYJDPO
Figure 1. Architecture of NTW.