030 - CODEN Designation (R)
MARC 21 Bibliographic - Full
February 1999
First Indicator
Undefined
# - Undefined
|
Second Indicator
Undefined
# - Undefined
|
|
|
Subfield Codes
|
$a - CODEN (NR)
$z - Canceled/invalid CODEN (R)
|
$6 - Linkage (NR)
$8 - Field link and sequence number (R)
|
FIELD DEFINITION AND SCOPE
CODEN designation for a bibliographic title. The CODEN is assigned by the International
CODEN Section of Chemical Abstracts Service.
CODEN is a unique identifier for scientific and technical periodical titles; it consists
of six characters.
GUIDELINES FOR APPLYING CONTENT DESIGNATORS
■ INDICATORS
- Both indicator positions are undefined; each contains a blank (#).
■ SUBFIELD CODES
$a - CODEN Valid CODEN for the title.
$z - Canceled/invalid CODEN If the valid CODEN is not known, subfield $z may be used alone in the record.
$8 - Field link and sequence number
INPUT CONVENTIONS
Structure - First four characters are mnemonic uppercase characters for serial titles to which a
fifth character (e.g., A, B, C, D) is added. The sixth character is a
computer-calculated check character which may be either alphabetic or numeric. All
alphabetic characters are in uppercase. Hyphens and spaces appearing in the CODEN
abbreviation are not carried in the MARC record.