学习内容管理系统的体系结构和关键技术

基于对学习内容标准化问题的研究,提出了一个学习内容管理系统的体系结构,该结构采用分层模型,自上而下分为客户层、应用层、数据服务层.同时针对学习内容管理系统建设过程中的几个关键问题:学习内容的共享及重用、学习内容入库效率、检索效率、数据的一致性和完整性等问题进行了探讨,给出了具体的解决方案并在样例系统中实现.在方案中采用中国网络教育技术标准中的“学习对象元数据标准”和“内容包装标准”,对学习内容进行标准化描述.采用元数据模版和自动获取信息的方式提高资源入库效率.对学习内容进行有效分类以提高检索效率.利用Java事务处理技术解决了数据一致性和完整性问题.

Learning content management system architecture and key technologies

This study proposes a learning content management system architecture based on the research on the standardization of learning content. This architecture adopps a layers model,classified into client layer,application layer and data layer from the top-down perspective.To explore the key issues,such as resource sharing and reusing,data input efficiency,resource retrieval efficiency,integrity and consistency of data,etc.,a detailed resolution is presented and implemented in a smaple learning content management system.In this study,the learning content is standardized according to the Learning object metadata standard and content packaging standard in the china elearning technology standatds.By using a metadata template and automatic informationretrieval,the metadata input efficiency is enhanced.The effective classification of the learning content dramatically enhances the data retrieval eficency.Finally,the problem of data integrity and consistency is solved by using the java transaction technology.