Criteria were divided into four major categories: (1) feature-related criteria, (2) language-related criteria, (3) audience-related criteria and (4) medium-related criteria.
标准分为四大类：⑴ 与地物有关的标准，⑵ 与语言有关的标准，⑶ 与使用者有关的标准，⑷ 与媒体有关的标准。