With the rapidly incensement of ontology size, it is very hard for a knowledge engineer to evolve ontology alone due to the knowledge and ability constraint.

• 随着本体规模的不断扩大,由于能力和知识的约束,单个知识工程师已经难以单独对本体进行改进,因此如何实现本体的协同进化成为了一个亟待解决的问题。