Field definition and scope:

Field 856 contains the information required to locate electronic information.  The information identifies the electronic location containing the resource or from which it is available.  It also contains information needed to retrieve the resource by the access method identified by the first indicator position.  The relationship of the electronic location and access information in field 856 to the resource identified by the record as a whole is identified by the second indicator.  The information contained in this field is sufficient to allow for the electronic transfer of a file, subscription to an electronic journal, or logon to an electronic resource.  In some cases, only unique data elements are recorded which allow the user to access a locator table on a remote host containing the remaining information needed to access the resource.  (This field is identical to field 856 (Electronic Location and Access) defined in the MARC 21 Format for Bibliographic Data.)

Field 856 is repeated when the location data elements vary (subfields $a, $b, $d) and when more than one access method may be used.  It is also repeated whenever the electronic filename varies (subfield $f), except when a single intellectual work is divided into different parts for online storage or retrieval.

See the "Guidelines for the Use of Field 856" for a more thorough discussion on the use of field 856.  It is located online at:  www.loc.gov/marc/856guide.html.

Field 856 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 856

Electronic Location and Access

R

Indicator:

 

 

First

Access method

 

#

No information provided

 

0

Email

 

1

FTP

 

2

Remote login (Telnet)

 

3

Dial-up

 

4

HTTP

 

7

Method specified in subfield $2

 

 

 

 

Second

Relationship

 

#

No information provided

 

0

Resource

 

1

Version of resource

 

2

Related resource

 

8

No display constant generated

 

 

 

 

Subfield code:

 

 

$a

Host name

R

$b

Access number

R

$c

Compression information

R

$d

Path

R

$f

Electronic name

R

$h

Processor of request

NR

$i

Instruction

R

$j

Bits per second

NR

$k

Password

NR

$l

Logon

NR

$m

Contact for access assistance

R

$n

Name of location of host

NR

$o

Operating system

NR

$p

Port

NR

$q

Electronic format type

NR

$r

Settings

NR

$s

File size

R

$t

Terminal emulation

R

$u

Uniform Resource Identifier

R

$v

Hours access method available

R

$w

Record control number

R

$x

Nonpublic note

R

$y

Link text

R

$z

Public note

R

$2

Access method

NR

$3

Materials specified

NR

$6

Linkage

NR

$8

Field link and sequence number

R

 

See:  Examples for this field.

Input conventions:

Embedded holdings information

Display constants

Spacing underscore and tilde in URLs

Style for recording telephone numbers

Content designator history:

Subfield $q - Electronic format type  [redefined]:  Prior to 1997, subfield $q was defined as File transfer mode to contain an indication of whether the file was transferred as binary or ASCII.  It was redefined to contain type of electronic format.

Subfield $g - Uniform Resource Name  [obsolete]:  Prior to 1997, subfield $g was defined as Electronic name -- End of range.  Because it was rarely if ever used, it was redefined as Uniform Resource Name.  It was made obsolete in 2000 in favor of recording the URN in subfield $u.

Subfield $u - Uniform Resource Locator  [repeatability changed]:  Prior to 1999, subfield $u was defined as repeatable.  It was changed to not repeatable in favor of repeating the field due to ambiguity in determining when the subfield could be repeatable.  Subfield $u was changed back to repeatable in 2000 to record URNs after subfield $g was made obsolete.  It was also renamed Uniform Resource Identifier in 2000 to account for URNs.

Subfield $y - Link text  [defined]:  In 2000, subfield $y was defined to use for display in place of the URL in subfield $u.

Related MARC fields or documents:

MARC 21 Format for Bibliographic Data:

753  System Details Access to Computer Files

856  Electronic Location and Access

MARC Code List for Organizations

Symbols and Interlibrary Loan Policies in Canada

Uniform Resource Locators (URL) (RFC 1738)

Value Lists for Codes and Controlled Vocabularies:

Electronic Access Methods Code List

See also:

852, 856  Location Fields

Variable Data Fields