The package defines an \excludeonly command, which is (in effect) the opposite of \includeonly. If both \includeonly and \excludeonly exist in a document, only files "allowed" by both will be included.

The package redefines the internal \@include command, so it conflicts with packages that do the same. Examples are the classes paper.cls and thesis.cls. The authors are Daniel H. Luecking and Donald Arseneau.