The directory is structured on the basis of the 10 seed-groups, a structure proposed by the Spiritual Hierarchy of our planet as a possible basis for the future world civilisation. This structure includes 10 possible fields of service. In each field, the focus of activity may be more or less esoteric. Some people work on the level of inner realisation and exploration, others on the level of outer materialisation and research. Of course, these two orientations only represent two sides of the same coin, and in some cases, the distinction is difficult to make.