Editing MARC standards (section)

===Content===

MARC encodes information about a bibliographic item, not information about the content of that item; this means it is a [[metadata]] transmission standard, not a content standard. The actual content that a cataloger places in each MARC field is usually governed and defined by standards outside of MARC, except for a handful of fixed fields defined by the MARC standards themselves. [[Resource Description and Access]], for example, defines how the physical characteristics of books and other items should be expressed. The [[Library of Congress Subject Headings]] (LCSH) are a list of authorized subject terms used to describe the main subject content of the work. Other cataloging rules and classification schedules can also be used.