Ikebana a piece's color combinations, natural shapes, graceful lines, and the implied meaning of the arrangement. Another common but not exclusive aspect present in "ikebana" is its employment of minimalism. Some arrangements may consist of only a minimal number of blooms interspersed among stalks and leaves. The structure of some Japanese flower arrangements is based on a scalene triangle delineated by three main points, usually twigs, considered in some schools to symbolize heaven, human, and earth, or sun, moon, and earth. Use of these terms is limited to certain schools and is not customary in more traditional schools. A notable exception
Styles of Chinese martial arts further identify the particular style. Other classification schemes include the concept of "external" () and "internal" (). This criterion concerns the training focus of a particular style. Religious affiliation of the group that found the style can also be used as a classification. The three great religions of Taoism, Buddhism and Confucianism have associated martial arts styles. There are also many other criteria used to group Chinese martial arts; for example, imitative-styles () and legendary styles; historical styles and family styles. Another more recent approach is to describe a style according to their combat focus. The traditional dividing line between