Page 135 - JOURNAL OF LIBRARY SCIENCE IN CHINA 2018 Vol. 42

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

terminology service.

1
1

᛫
ѹ η η ሙ ሙ ஔ η ৱ ॷ ॷ ఻ ॎ ៶ ᛫ ஝ ኮ х ҷ ڎ ᇫ ࠫ ܱ η ஝ ᝠ ေ ሙ ඟ ҷ ၷ
ழ ৌ ৌ ߦ ੿ ߦ ৌ ਖ ေ ေ ٨ र Ἧ ໦ ૶ ေ ኖ ү ࠒ ͘ ܱ ̔ ৌ ૶ ካ ᝷ ߦ ீ ү ေ
ኮ ೝ ߦ ᆑ ੇ ေ ੿ Ϥ ೝ ᤿ ॷ ܫ ߦ ߦ ҧ ᛡ ˟ ஋ Т ܫ ኮ வ ҧ ᜻ ߦ Ӽ ߦ
ေ ጊ ቃ ౧ ᝷ ష क ጊ ᣤ ေ ေ ஋ ˧ ኖ ጇ ေ ေ ข ߦ ѳ ၷ
ߦ ఻ ᭩
ἰ Т ֑
Note：P1is P@5 without the use of the terminology service, P2 is P@5 with the use of the terminology service.
ฌ὘1 ˞ళΎၹషឦ఩Ҭᄊ1! ϙὊ1 ˞Ύၹషឦ఩Ҭᄊ1! ϙ
Figure 8. The P@5 values of Baidu search engine with or without the use of the “GetSynonym” terminology service.

4 Usability of terminology services for information retrieval

ISO defines usability as “the extent to which a product can be used by specified users to achieve
specified goals with effectiveness, efficiency, and satisfaction in a specified context of use”
(International Standards Office, 1998). Usability is an important quality attribute of an information
retrieval system, and used to evaluate whether the interface of an information retrieval system is
easy to use, easy to learn and useful (Kelly, 2009). The usage of terminology services depends
a great deal on the interaction between users and information retrieval systems. It is a problem
worthy of studying which usage mode of terminology services in information retrieval systems can
make users get the best benefit and also make operations simple. In this study, we designed four
usage modes of terminology services in the user interface of information retrieval systems and then
evaluated the usefulness of these four usage modes.

4.1 Design of the usage modes of terminology services

Based on literature survey, the usage modes of thesauri in database or information retrieval systems
can be summarized as: normalize query terms input by users; recommend relevant query terms,
expand query terms with broader terms, refine query terms with narrower terms, help users browse
the content of a vocabulary and select appropriate terms for information retrieval etc. (Shiri &
Revie, 2000). In addition, we performed a user survey to explore which kind of term supports users
expect to get from information retrieval systems. Based on the above, we designed the following