Denotative meaning - the sentence means what it is about .

外延意义（denotativemeaning）句子的意义是它的所指。

Connotation is the second order of signification , which uses the denotative sign .

内涵意义是第二顺序,用色彩标志。

When the scale of the city develops into a certain level , urban development will be expanded gradually giving way denotative connotative update , reform and protection .

当城市规模发展到一定程度之后,城市建设将会由外延式拓展逐渐让位于内涵式的更新、改造和保护。

Based on the connotative and denotative feature of concept , knowledge concept of information system were presents , its nature , principles of knowledge discovery were gotten , attribute reduction and application based on knowledge concept were given .

利用概念的内涵与外延的特点，给出信息系统的知识概念，得到信息系统知识概念的性质和知识发现原理，并给出基于知识概念的属性约简和应用。