中文摘要：

每一种信息系统都有适合自身环境与工作效率的领域模型，因而系统间存在各种异构性．如何克服系统间的异构性，尤其是语义异构，是实现信息共享的关键问题．本体是对领域概念化的一个显式的规格说明，可以用来描述信息系统的语义．利用描述逻辑建立了本体的模型，并从本体的角度分析信息系统异构性形成的机理，将信息系统之间的语义异构性归结为概念化冲突异构和术语指派冲突异构两大类，随后提出通过本体映射消除冲突的解决办法，最后建立基于本体映射的异构系统语义集成框架，并对该框架下的数据请求、数据答复、以及数据搜索策略进行分析．

英文摘要：

Every information system has its own domain model for its environment and efficient task operations, which results in diverse heterogeneities, especially the semantic heterogeneity. So a shared domain model is required in order to make heterogeneous systems communicate effectively and enable information sha- ring. Ontology is an agreement about shared conceptualizations, which can make the meaning of the different vocabularies used explicit, and so the semantics of diverse information systems can be captured by ontology- definitions of terms. This paper constructs an ontology model using description logic, divides the types of het- erogeneity of information system into two categories from the ontological view： conceptualization conflict and coding conflict, and analyses approaches to solve conflict by ontology mapping. Finally, this paper constructs a semantic-oriented integration architecture for heterogeneous systems based on ontology mapping, and investi- gates the model for data request and data response under the architecture, and proposes five rules for data search.