Page 119 - JOURNAL OF LIBRARY SCIENCE IN CHINA 2015 Vol. 41

118 Journal of Library Science in China, Vol. 7, 2015

from texts, and a complex network of the historical knowledge on contemporary China was
constructed.

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Figure 4. Construction of the knowledge network on “The Third Plenary Session of

Eleventh Central Committee of the Chinese Communist Party”.

2.5 Multidimensional organization based on knowledge network

After “Mining down”, the knowledge network, which consists of knowledge object layer, fact layer
and text item layer is built. Based on it, historical knowledge can be organized at a higher level
according to the relations such as time, subclass, hierarchy, and statistics.
(1) Organization in time dimension
Time dimension is the most direct way to show historical development process. According
to the time sequence, text items in different books can be reorganized according to the historical
period, the knowledge objects can also be ordered by the Time class in the ontology, and similarly
the facts about one knowledge object can be done like this. In addition, the facts in the same
historical period can be displayed together, such as occurred events, held conference, proposed
policy, founding institutions, published works or documents, presented speeches, and so on.
(2) Text item organization based on knowledge objects
The knowledge objects and facts extracted from text items provide a basis for deeper