each of the ten parts contains from 2 to 7 divisions, which in turn contain from 2 to 11 sections. these sections form the basic categories of knowledge in the schema, and each one is given a special three-part numerical code to encode its place in the "outline's" hierarchy. for example, the section "military technology" has the code "736" indicating that it is the 6th section of the 3rd division ("major fields of technology") of the 7th part ("technology"). forward slashes are used when a part, division or section has more than one digit; for example, the section "history and philosophy of logic" has the code "10/11" indicating that it is the 1st section of the 1st division ("logic") of the 10th part ("the branches of knowledge").