644 Series Analysis Practice (Authority)

644 Series Analysis Practice (R) (Variable Data Field)

Field definition and scope:

Field 644 contains a one-character alphabetic code that indicates a specific organization's analysis practice for a series named in the 1XX field of an established heading record for a series . The code specifies whether all, some, or none of the volumes of a series are analyzed for bibliographic records. The field may also contain the volumes/dates and/or the institution/copy identification to which the practice applies.

Field 644 is not used to indicate that a series-like phrase is not analyzed.

Varying analysis practices for different

ranges of volumes/dates within a series

copies or sets within the same organization

organizations

are contained in separate 644 fields.

The National level record requirement for this field is Optional.

Field 644 is repeatable .

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, National level (NLR) record requirements , and designator repeatability , see table below:

Position	Description	NLR	Repeatability
Field 644	Series Analysis Practice	O	R
Indicator:
First	Undefined; contains a blank	M
Second	Undefined; contains a blank	M

Subfield code:
$a	Series analysis practice	M	NR
$b	Exceptions to analysis practice	A	NR
$d	Volumes/dates to which analysis practice applies	*current -* O earlier - M	NR
$5	Institution/copy to which field applies	M	R
$6	Linkage	A	NR
$8	Field link and sequence number	O	R