A common (canonical) UML class model of the main data items (the business entities) and their relationships.
主要数据项(业务实体)及其关系的通用(规范的)uml类模型。
2
The first class of methods is available for canonical product of sums form and the second one is available for arbitrary boolean expressions.
第一类方法适用于和之积范式，第二类方法适用于任意布尔表达式。
3
First, the general form of input-output equation has been given and a input-output difference equation corresponds to a class of canonical form has been obtained.