This paper discusses basic issues of information visualization and knowledge organization, and analyzes visualization of Topic map and Ontology with examples.

讨论信息可视化、知识组织的基本问题，并结合实例分析主题地图和本体的可视化。

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While constructing domain knowledge base, ontology-based hierarchical categorization system of domain knowledge base is our main research topic.

在构建领域知识库的过程中，领域知识库的层次分类体系的构建工作就成为我们重点要研究的内容之一。

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