To give a solution for the conventional managing software system of substation equipment that necessitates program modifications for different projects, a vieworiented data programming interface is presented and its dictionary data design, relational operation design, etc.

Based on CBD and from the point of the software evolvement,the conceptual and technical model of evolved component and the relative theories of relation operations between evolved component were proposed in this paper.

Proving Lagrange theorem mean through the introduction of auxiliary function,this article puts forword the methods of building auxiliary function by the mathematical operations and two functions compound operation;this is a method building all elementary function by the basic elementary function,which is a way to solve the problem of the auxiliary function building.

It is given the demonstration that using the definitional method demonstrate binary function s arithmetic operation and compound operation of differential calcultus.