In generation of ECL, according to the internal relation between RRECL and ECL , thie thesis come up with a new ideal ,which is to use RRECL and the generating intension group to construct ECL.

• 在扩展概念格的构造方面，本文根据相对约简概念格和扩展概念格的内在联系，提出利用相对约简概念格、生成内涵基集合进行扩展概念格的完全构造。