The term class is defined as a group of objects or creations that have some traits or characteristics in common in terms of style, form, or subject matter. Members of a class show some attribute or property in common and this quality differentiates it from others.  They show similar qualities and general properties. A class of artistic creations will include only objects or creations having same qualities and properties. For example, fine art paintings may be divided into different classes such as portraits, landscape, history paintings, still life etc.