The general guidelines for codes contained in this documentation are the following.  Codes are composed of lowercase alphabetic characters, and, in some cases, numeric characters 0 through 9 and the hyphen (-).  Codes vary in length, but most codes have a maximum of 12 characters.  Codes are usually based on the title or numbering of the documentation.

The code may be followed by the addition of edition, language, or date of publication of the source documentation.  The code is separated from the addition by a slash (/).  Examples:



Instead of the full name of a language, the 3-character MARC language code should be used when the code addition for language is needed.  Example:


Omission of the edition, language, or year will imply that the assigning institution used the edition that was current when the record was created.

See also: