Library of Congress Classification Library of Congress classification indexes use only the subject portion of the call numbers assigned. Zero ranging has been eliminated. Only subfield a of the classification number is searchable. Government Document Number Delete all punctuation and spaces to search government document numbers. Each part of a subject heading is indexed as a separate phrase.
Right truncation is supported for subject heading phrases.
Title phrase Exclude a, an, or the when it is the first word of the title. Include a non-English article when it is the first word of the title. Because right truncation is supported for title phrases, you can type around the majors to search for this title and others that begin around the majors , if right truncation is set. The maximum length of a phrase is 70 characters. Titles longer than 70 characters are truncated.