Page 188 - JOURNAL OF LIBRARY SCIENCE IN CHINA 2018 Vol. 43

188
188 Journal of Library Science in China, Vol.9, 2017

frequency is 1.1. 4)Distribution in the journal level generally follows the Bradford’s law and
therefore core journals exist as major sources for policy documents’ reference. The ranking of core
journals is not directly related to journal impact factor, for example, Nature and Science both drop
out of top five. Whether or not the scientific product is mentioned in policy document is decided by
needs, for example, many policy documents of European Food Safety Authority would reference
EFSA Journal. Journals from Medicine and Economy are most frequently mentioned, taking up 24
among the top 30. 5)Health Science and Medicine are most frequently mentioned disciplines that
occupy nearly half of the total mentions. In addition, Social Science, Economic and Life Science
are also frequently mentioned. Together the top five disciplines take up 73% of scientific product
with policy documents altmetrics. 6)The Altmetric attention score of scientific product that has
policy documents altmetrics indicator presents average or slightly higher than average performance
and has no significant advantage, compared with other scientific product of the same period, same
journal or general situation, indicating the general attention received by scientific product is not
directly related to policy documents altmetrics.
Major originality of the study is: 1)The study systematically and accurately measures the
immediacy distribution of policy documents altmetrics and pointed out the average delay is 4.5
years. 2)The study measures the distribution of policy documents altmetrics in article level, journal
level and discipline level, and identifies core journals and core disciplines, providing reference
for constructing normalized indicators. However, there is some limitation of which the major one
is tracked sources of policy documents are far from complete, making the measurement based on
the data sources not representing enough. Moreover, data errors exist in current collected data,
which is reflected in immediacy distribution analysis. So, the practical usage of policy documents
altmetrics awaits further development of the field.

Narrative image annotation ontology for semantic Web

〇a*
XU Lei & WANG Xiaoguang〇
Narrative image is one type of visual literature resources that intends to tell stories. In face of its
obscure and abstract nature, existing narrative-relevant semantic models appear inadequate for its
semantic annotation and description. To address the issue, this paper designs an ontology model for
deep semantic annotation applicable for narrative images.
The model resorts to the design thought as in modular ontology, integrates with Open Annotation
Collaboration(OAC)framework, and takes plot, entity, dynamics and context as its core. The
model addresses issues such as the organization and representation of spatio-temporal information
in narrative images, and the mapping between narrative model and annotation information.

* Correspondence should be addressed to WANG Xiaoguang, Email: whu_wxg@126.com, ORCID: 0000-0003-1284-7164