Adding semantic annotation to UML class diagram

Understanding of attributes of UML class diagram can be influenced by various factors. Semantic annotation for attributes can help model users understand their meaning precisely. As a result, services provided by the models can be better applied in the data processing tasks of the users. This paper proposes a method of semantic annotation of UML class diagram and provides detailed steps of implementation as well as the format of the annotation files. Finally, the paper discusses extended applications of annotation files.