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 is Optional.

Guidelines for applying content designators:

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:

 008/17  Type of subject subdivision

For information on other 008 character positions, see:

008  Fixed-Length Data Elements

See also:

Variable Control Fields