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 .
