027 Standard Technical Report Number

Field definition and scope:

Field 027 contains an International Standard Technical Report Number (ISRN) or a Standard Technical Report Number (STRN) that is copied from subfield $a of field 027 (Standard Technical Report Number) of the MARC bibliographic record that represents the description of the item for which a separate holdings record is created.

It may also contain any canceled or invalid numbers from subfield $z of field 027 in the bibliographic record. The ISRN and STRN are formulated according to specifications in the standards International Standard Technical Report Number (ISRN) (ISO 10444), Standard Technical Report Number Format and Creation (ANSI/NISO Z39.23-1997), or Standard Technical Report Number (STRN), Format and Creation (ANSI Z39.23-1983), and assigned to a technical report. The technical report number is usually the primary means of identifying a specific technical report.

Field 027 is repeatable for multiple ISRNs and STRNs associated with an item.

A fuller description of the STRN is given in field 027 (Standard Technical Report Number) in the MARC 21 Format for Bibliographic Data.

Field 027 is repeatable.

Guidelines for applying content designators:

For indicator and subfield code definitions and examples, and designator repeatability, see table below:

Position	Description	Repeatability
Field 027	Standard Technical Report Number	R
Indicator:
First	Undefined; contains a blank
Second	Undefined; contains a blank

Subfield code:
$a	Standard Technical Report Number	NR
$q	Qualifying information	R
$z	Canceled/invalid STRN	R
$6	Linkage	NR
$8	Field link and sequence number	R

Input conventions:

Number structure

Punctuation

Embedded holdings information

Content designator history:

Subfield $q - Qualifying information [new, 2013]