基于属性文法的本体形式化描述方法及其应用

Formal Description Method for Ontology Based on Simple Attribute-Grammar and Its Application

在分析本体概念和性质的基础上, 提出一种基于简单属性文法的本体形式化描述方法, 其中文法产生式描述本体内的各种逻辑关系, 为逻辑层推理奠定了基础, 通过属性求值规则实现本体的语义; 设计一种属性求值器的构造方法, 在此基础上实现基于语义的信息检索模型; 将基于XML (extensibleMarkupLanguage)的本体元数据模型作为属性求值器处理的对象, 提供相应的文档类型定义 (DTD: DocumentTypeDefinition)以指导XML文档的创建; 结合应用实例说明基于此方法的信息检索结果具有令人满意的精确度; 通过改变产生式、属性及属性求值规则可扩充此方法。

Based on the analysis of the concept and characteritics of ontology, a formal description method for ontology was proposed based on simple attribute-grammar, in which syntax rules that describe a series of logic relationships in ontology are the basis for inference in Logic Layer, and attribute-calculating rules realize the semantic for ontology. A model for information retrieving based on semantics is designed on the basis of a structure for attribute-calculator. Metadata model for ontology based on XML (eXtensible Markup Language) is processed by attribute-calculator, and corresponding DTD (Document Type Definition) is provided to guide document creating. A concrete application example is presented to demonstrate the retrieving result based on the method with satisfying precision. The method can be extended by perfecting syntax rules,attributes and attribute-calculating rules.