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
Style guide Many house styles and individual project styles change more frequently, especially for new projects. Several basic style guides for technical and scientific communication have been defined by international standards organizations. One example is ISO 215 "Documentation — Presentation of contributions to periodicals and other serials". The European Union publishes an "Interinstitutional style guide"—encompassing 24 languages across the European Union. This manual is "obligatory" for all those employed by the institutions of the EU who are involved in preparing EU documents and works. The Directorate-General for Translation of the European Commission publishes its own "English Style Guide", intended primarily for English-language