Scores format OCLC-MARC format used to catalog musical scores. Serials format OCLC-MARC format used to catalog serials. OCLC-MARC format used to catalog sound recordings. The system omits these words from indexing because they retrieve more records than the system can display and add no value to the subject content of the search. For example, a , an , and , the , and or . subfield The smallest logical unit of information in a field.
Subjects categorize library material.
For example, an item about atomic structure and another item about neutrons can have the same subject entry, Nuclear physics . Tags are grouped numerically by function. A word, phrase, character, or group of characters, normally appearing on an item that names the item or the work contained in it. Examples are sonatas, songs, Aesop's fables, and the Bible. Visual Materials format OCLC-MARC format used for cataloging projected medium, nonprojected graphics, etc.