Class
A class is a classifier which describes a set of objects that share the same
o features,
o constraints,
o semantics (meaning).
A class is shown as a solid-outline rectangle containing the class name, and optionally with compartments separated by horizontal lines containing features or other members of the classifier.
As class is the most widely used classifier, there is no need to add the "class" keyword in guillemets above the class name. Class name should be centered and inbold face, with the first letter of class name capitalized (if the character set supports upper case).