One major job of making the web data machine - understandable is to let computers understand the connotation of data . computers " comprehensive capabilities rely mostly on reasoning techniques . so the reasoning techniques play a key role in semantic web 由于语义web的目标就是实现web的“机器理解” , “机器理解”指让计算机理解信息的内涵,其理解能力与推理能力休戚相关,因此语义web的智能推理技术在实现web的语义性上起着核心的作用。