LMOD:一种基于本体描述的电子学习资源库模型

摘要

为了解决现有资源库在资源检索查全率、查准率上存在的不足,将语义特征引入到电子学习资源库模型的构建之中,提出了一种基于本体描述的电子学习资源库模型LMOD.LMOD通过构建电子学习资源库本体并生成相应的语义元数据,规范地描述资源,将资源以机器可理解的方式组织起来;并利用语义学视图规范用户查询语句.在此基础上实现基于语义的资源查询,以有效地解决搜索中含糊解释与同义识别的问题.实验证明,该模型能够有效克服现有资源库建设方案的缺点,提升资源库的可用性与使用效率.%In order to solve the defect of existing resource library on recall and precision of resource retrieval, this article introduced the semantic characteristic into the construction of e-lear-ning resource library model, proposed an e-lear-ning resource library model based on ontology describing which named LMOD. LMOD described the resources normative by building e-learning resource library ontology and generating correlative semantic metadata, organized the resources in machine-understandable way, and standardized user query by utilizing the semantics view. On this basis, LMOD achieved the semantic-based query in order to effectively address the problems such as ambiguous interpretation and synonym recognition in resource retrieval. The experiment proves that the model can overcome the defect of existing resource library building scheme and enhance the service efficiency and availability of e-learning resource library.