Consider the appropriateness of subdivisions before assigning them across-the-board to each subject heading in a record. For example, a directory of British astronomers studying extraterrestrial life could receive the headings. Example:

The fact that the rules allow for the formation of a particular heading and subdivision combination does not mean that the combination is necessarily appropriate. First, consider whether the combination makes sense and, if possible, search to see if they have been used together in other records. For a list of subdivisions commonly used for serials, see CEG Appendix J.

See also:

15.2. Guidelines