With regard to designing application system, the thesis studies the conceptual modeling method of spatiotemporal applications.
论文从应用系统开发的角度，对时空应用的系统概念建模方法进行了研究。
As a modeling tool which can describe the conceptual structure of information system at semantic and knowledge levels, ontology has very large advantage in knowledge modeling.
本体作为一种能在语义和知识层次上描述信息系统的概念模型的建模工具，它在知识建模上具有非常大的优势。
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