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

856 - Electronic Location and Access (R)

MARC 21 Bibliographic - Concise

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, $b, $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.
$b - Access number (R)
Access number associated with a host. It can contain the Internet Protocol (IP) numeric address if the item is an Internet resource, or a telephone number if dial-up access is provided through a telephone line. This data may change frequently and may be generated by the system, rather than statically stored.
$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)
$f - Electronic name (R)
$h - Processor of request (NR)
Username, or processor of the request; generally the data which precedes the at sign ($) in the host address.
$i - Instruction (R)
Instruction or command needed for the remote host to process a request.
$j - Bits per second (NR)
$k - Password (NR)
$l - Logon (NR)
Characters needed to connect (i.e., logon, login, etc.) to an electronic resource or FTP site. Used to record general-use logon strings which do not require special security.
$m - Contact for access assistance (R)
$n - Name of location of host (NR)
Conventional name of the location of the host in subfield $a, including its physical (geographic) location.
$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 - Settings (NR)
$s - File size (R)
$t - Terminal emulation (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.
$8 - Field link and sequence number (R)
See description of this subfield in Appendix A: Control Subfields.
856 0#$$iejap subscription
856 1#$u
856 2#$utelnet://$nPrinceton University, Princeton, N.J.
856 3#$$b140.147.254.3$$t3270$tline mode (e.g., vt100)$vM-F 6:00-21:30 USA EST, Sat. 8:30-17:00 USA EST, Sun. 13:00-17:00 USA EST
856 40$u
856 7#$3b&w film copy neg.$ddag$f3d01926$2file
856 42$3Finding aid$u
856 41$u
856 40$u$qtext/html
856 1#$u$kguest
856 42$3French version$u
856 42$3Essays from annual reports$u
856 1#$u$s16874 bytes
856 2#$utelnet://$nUniversity of Maine$t3270
856 1#$u$cdecompress with PKUNZIP.exe$xcannot verify because of transfer difficulty
856 4#$zPart of the Ovid Mental Health Collection (MHC). Follow instructions on MedMenu page for Ovid login.$u
856 40$u$zAddress for accessing the journal using authorization number and password through OCLC FirstSearch Electronic Collections Online. Subscription to online journal required for access to abstracts and full text
856 4#$u$yElectronic resource (JPEG)
856 4#$u$yElectronic resource (PDF)
856 2#$$b128.101.95.23
856 1#$$cMust be decompressed with PKUNZIP$
856 0#$akentvm.bitnet$facadlist file1$facadlist file2$facadlist file3
856 0#$auicvm.bitnet$fAN2$hListserv
856 2#$$nUniversity of Michigan Weather Underground$p3000
856 10$zFTP access to PostScript version includes groups of article files with .pdf extension$$d/pub/EIS/vol*no*/adobe$f*.pdf$lanonymous$qapplication/pdf

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