Based on Ontology, Ontology Molecule is a theory for dynamic knowledge management and control utilizing Description Logics and graph theory. This paper proposes to apply Ontology Molecule to the domain of Digital Library. It puts forward a four-leveled knowledge organization model for Digital Library based on Ontology and Ontology Molecule. It further discusses the realization mechanism of dynamic knowledge management level of the four. Then, it introduces the functions of a Ontology Molecule base building tool in details, after analyzing the structure of Ontology Molecule base. The tool is able to solve the problems of knowledge organization of Core, Outer and Ontology Molecule.%本体分子是在本体的基础之上,结合描述逻辑、图论等相关理论,用于解决动态知识组织管理和控制的理论.本文提出将本体分子应用于数字图书馆领域,建立一个以本体、本体分子为核心数字图书馆知识组织四层模型.本文进而深入地探讨了其中动态知识组织层的实现机制.然后,本文在分析本体分子库结构的基础之上,详细介绍了本体分子建库工具的特点与功能.该建库工具能够较好地解决核子、离子和本体分子等知识组织问题.
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