UML (Unified Modeling Language) is a graphical notation of a software conceptual diagram. People can use it
Draw a graphics, use these graphics to represent a planned domain, or use these pictures to represent one
Software implemented. Fowler (Translator Note: Famous IT Technologist) describes three different levels:
Conceptual, specification layer (Specification) and Implementation, I
They will be described later.
The graphic of the specification layer and the realization layer have a significant relationship with the source code. In fact, the diagram of the specification layer is ready for use.
To convert into a source code, similarly, the figure of the realization layer is intended to describe the source code already existing. In these layers
Supreme graphics, there are many rules and semantics to follow, these fewer dismissal, basically have strict formats.
On the other hand, there is no strict relationship with the source code on the concept layer, and they are related to human natural language.
turn off. They are used to describe the concepts and abstraction of the problem of human problems already existing. They do not have to follow
Semantic rules, so they mean that there will be ambiguous, and the subject can be explained.
