Library of Congress >> MARC >> Bibliographic >> 841-88X  >> 856

856 - Electronic Location and Access (R)

MARC 21 Bibliographic - concise
July 2022

Information needed to locate and access an electronic resource. The field may be used in a bibliographic record for a resource when that resource or a subset of it is available electronically. In addition, it may be used to locate and access an electronic version of a non-electronic resource described in the bibliographic record or a related electronic resource.

See the Guidelines for the Use of Field 856 for a more thorough discussion on the use of field 856.

Field 856 is repeated when the location data elements vary (the URL in subfield $u or subfields $a and $d, when used). It is also repeated when more than one access method is used, different portions of the item are available electronically, mirror sites are recorded, different formats/resolutions with different URLs are indicated, and related items are recorded.


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 Codes

$a - Host name (R)
Fully qualified domain (host name) of the electronic location. It contains a network address which is repeated if there is more than one address for the same host.
$c - Compression information (R)
Information about the compression of a file, in particular, whether a specific program is required to decompress the file.
$d - Path (R)
$e - Data provenance (R)
See description of this subfield in Appendix J: Data Provenance Subfields.
$f - Electronic name (R)
$l - Standardized information governing access (R)
$m - Contact for access assistance (R)
$n - Terms governing access (R)
$o - Operating system (NR)
$p - Port (NR)
Portion of the address that identifies a process or service in the host.
$q - Electronic format type (NR)
Identification of the electronic format type, which is the data representation of the resource, such as text/HTML, ASCII, Postscript file, executable application, or JPEG image. Electronic format type may be taken from enumerated lists such as registered Internet Media Types (MIME types).
$r - Standardized information governing use and reproduction (R)
$s - File size (R)
$t - Terms governing use and reproduction (R)
$u - Uniform Resource Identifier (R)
Uniform Resource Identifier (URI), which provides standard syntax for locating an object using existing Internet protocols. Field 856 is structured to allow for the creation of a URL from the concatenation of other separate 856 subfields. Subfield $u may be used instead of those separate subfields or in addition to them.
Subfield $u may be repeated only if both a URN or a URL or more than one URN are recorded.
$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)
Access method when the first indicator position contains value 7. Code from: Electronic Access Methods Code List.
$3 - Materials specified (NR)
$6 - Linkage (NR)
See description of this subfield in Appendix A: Control Subfields.
$7 - Access status (NR)
Code indicating the availability of access to the remote electronic resource the address of which appears in subfield $u. Subfield $7 applies to all subfields $u present in the field.
$8 - Field link and sequence number (R)
See description of this subfield in Appendix A: Control Subfields.


856 42$3Finding aid$u//
856 40$3HathiTrust Digital Library, Full view$u$70
856 41$u
856 40$u$qtext/html
856 1#$u
856 42$3French version$u
856 42$3Essays from annual reports$u
856 1#$u$s16874 bytes
856 2#$utelnet://
856 1#$u$cdecompress with PKUNZIP.exe$xcannot verify because of transfer difficulty
856 4#$zPart of the Ovid Mental Health Collection (MHC). Follow instructions on MedMenu page for Ovid login.$u
856 40$u$zAddress for accessing the journal using authorization number and password through OCLC FirstSearch Electronic Collections Online. Subscription to online journal required for access to abstracts and full text
856 4#$u$yElectronic resource (JPEG)
856 4#$u$yElectronic resource (PDF)
856 40$l(star)Unrestricted online access$l$nOpen access$r(cc)CC BY-NC-ND 4.0$r$tAttribution-NonCommercial-NoDerivatives 4.0 International$qapplication/pdf$u$70
856 2#$
856 1#$$cMust be decompressed with PKUNZIP$
856 0#$akentvm.bitnet$facadlist file1$facadlist file2$facadlist file3
856 0#$auicvm.bitnet$fAN2
856 2#$$p3000
856 10$zFTP access to PostScript version includes groups of article files with .pdf extension$$d/pub/EIS/vol*no*/adobe$f*.pdf$qapplication/pdf

Library of Congress >> MARC >> Bibliographic >> 841-88X  >> 856
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