008/17 Type of subject subdivision (Authority)

008/17 Type of subject subdivision (Variable Control Field - Fixed-Length Data Element)

Character position definition and scope:

A one-character alphabetic code that identifies the type of authorized subject subdivision contained in the 1XX heading field in a subdivision record , an established heading and subdivision record , or a reference and subdivision record . Code n is used in all other kinds of records. The fill character ( | ) is used when no attempt has been made to code this 008 position.

National Level Requirement for character position 008/17 and the codes below: Optional.

Guidelines for applying content designators:

Code:	Description:
a	Topical
b	Form
c	Chronological
d	Geographic
e	Language
n	Not applicable
\|	No attempt to code

Content designator history:

# - Undefined [obsolete, 1986]: Value # (blank ) was used in records before the definition of character position 008/17 in 1986 as Type of subject subdivision. Records created prior to that time may contain a # meaning undefined in this position.

LC guidelines for usage:

008/17 Type of subject subdivision

For information on other 008 character positions, see:

008 Fixed-Length Data Elements

See also:

Variable Control Fields