The Subject Authority File contains main headings, cross references, and main heading/subdivision combinations established by the Library. However, not all valid headings and subdivisions are displayed in the printed versions of the list or the machine-readable Subject Authority File. The following categories of authorized headings and/or subdivisions, except where they serve as patterns or examples or when they require unique cross references, are excluded from the list: headings that reside in the Name Authority File, certain music headings with established citation orders, and combinations of headings with free-floating phrases or subdivisions.

13.0 References

13.1 Headings and cross references included in the Subject Authority File

13.2 Headings omitted from the list

13.3 Subdivisions omitted from the list

See also:

Principles of Heading Construction