Assign headings only at one level of the same subject hierarchy, being as specific as possible. For example, the Journal of Hospital Care would receive the subject heading Hospital care- - Periodicals, but not Medical care- -Periodicals. While the latter heading includes hospital care, it also includes many other types of medical care that are not covered by the periodical. Example:

Exceptionally, when a serial’s title indicates coverage of subjects at different levels, assign overlapping headings. This may also be done to reflect the organization of a serial that is primarily general but has a significant section on a specific narrower topic. Example:

Exceptionally, when a serial’s title indicates coverage of subjects at different levels, assign overlapping headings. This may also be done to reflect the organization of a serial that is primarily general but has a significant section on a specific narrower topic. Example:

See also:

15.2. Guidelines