Class Diagrams show the different classes that make up a system and how they relate to each other. Class Diagrams are said to be static diagrams because they show the classes, along with their methods and attributes as well as the static relationships between them: which classes know about which classes or which classes are part of another class, but do not show the method calls between them.
Os diagramas de clase mostran as diferentes clases que conforman o sistema e como se relacionan entre si. Sóese dicir que os diagramas de clase son estáticos porque mostran as clases, xunto cos seus métodos e atributos así como as relacións estáticas entre elas: que clases coñecen da existencia de outras ou que clases son parte de outras clases, pero non mostran as chamadas a métodos entre elas.