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) Discipline Ontology is constructed, which is the formalization for concepts and the relationships between concepts existing in some discipline domain. OWL is adopted as Discipline Ontology description language; 2) Inference rules are defined on the basis of Discipline Ontology. Semantic extension on keyword from user is
On the basis of the statistics of keywords from 5750 papers published in professional journals from 2007 to 2011 in educational technology, this paper selected the top 46 high-frequency keywords, generated co-word matrix by using SATI tools, made use of statistical analysis software SPSS for co-word clustering
letting students take the lecture, most do not include advanced search methods or implement topic detection or extraction. To aid for e-Learning users, we have been developing search facilities for VOD lectures. For this purpose, this study proposes a method of extracting the topic by creating a graph of keywords and their
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