Structured knowledge contains a wealth of information, it can effectively help learners to carry out the knowledge model and apply the knowledge flexibly. There are many ways to express the structured knowledge, ontology is one of them. Ontology clearly express the contents of domain knowledge and relationships between knowledge points. Structured knowledge is often used in computer processing, few of people are able to use these resources to promote their study. They often don't know from where and how to start their study when they face the complex structured knowledge. To improve the proble...
