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856 - ELECTRONIC LOCATION AND ACCESS (R)
The 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.
Field 856 is repeated when the location data elements vary (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.
See the Guidelines for the Use of Field 856 for a more thorough discussion on the use of field 856
Indicators
- First - Access method
A value that defines the access method to the electronic resource. If the resource is available by more than one access method the field is repeated. When recording a URL in subfield $u the value corresponds to the access method (URL scheme) which is also the first element in the string.- # - No information provided
- 0 - Email
Indicates that access is through the Mail Transfer Protocol (MAILTP).
- 1 - FTP
- 2 - Remote login (Telnet)
- 3 - Dial-up
Indicates that access to the electronic resource is through a conventional telephone line.
- 4 - HTTP
Indicates that access to the electronic resource is through the Hypertext Transfer Protocol.
- 7 - Method specified in subfield $2
- Second - Relationship
A value that identifies the relationship between the electronic resource at the location identified in field 856 and the item described in the record as a whole. Subfield $3 is used to provide further information about the relationship if it is not a one-to-one relationship.- # - No information provided
- 0 - Resource
Indicates that the electronic location in field 856 is for the same resource described by the record as a whole. In this case the item represented by the bibliographic record is an electronic resource. If the data in field 856 relates to a constituent unit of the resource represented by the record subfield $3 is used to specify the portion(s) to which the field applies.
- 1 - Version of resource
Indicates that the location in field 856 is for an electronic version of the resource described by the record. In this case the item represented by the bibliographic record is not electronic but an electronic version is available. If the data in field 856 relates to a constituent unit of the resource represented by the record subfield $3 is used to specify the portion(s) to which the field applies.
- 2 - Related resource
Indicates that the location in field 856 is for an electronic resource that is related to the item described by the record. In this case the item represented by the bibliographic record is not the electronic resource itself. Subfield $3 can be used to further characterize the relationship between the electronic item identified in field 856 and the item represented by the bibliographic record as a whole.
- 8 - No display constant generated
Subfield Codes
- $a - Host name (R)
The 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)
The 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)
The username or processor of the request; generally the data which precedes the "@" in the host address. - $i - Instruction (R)
An instruction 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. This subfield is 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)
The full name of the location of the host in subfield $a including its geographical location. - $o - Operating system (NR)
- $p - Port (NR)
The portion of the address that identifies the process or service in the host. - $q - Electronic format type (NR)
An 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)
The 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)
The access method when the first indicator position contains value 7. - $3 - Materials specified (NR)
- $6 - Linkage (NR) See Control Subfields
- $8 - Field link and sequence number (R) See Control Subfields
Examples
856 |
0#$umailto:ejap@phil.indiana.edu$iejap subscription |
856 |
1#$uftp://path.net/pub/docs/urn2urc.ps |
856 |
2#$utelnet://pucc.princeton.edu$nPrinceton University Princeton N.J. |
856 |
3#$alocis.loc.gov$b140.147.254.3$mlconline@loc.gov$t3270$tline mode (e.g. vt100)$vM-F 06:00-21:30 USA EST Sat. 08:30-17:00 USA EST Sun. 13:00-17:00 USA EST |
856 |
40$uhttp://jefferson.village.virginia.edu/pmc/contents.all.html |
856 |
7#$3b & w film neg.$ddag$f3d01926$2file |
856 |
42$3Finding aid$uhttp://www2.loc.gov/ammem/ead/jackson.sgm |
856 |
41$uhttp://www.jstor.org/journals/0277903x.html |
856 |
40$uhttp://www.cdc.gov/ncidod/EID/eid.htm$qtext/html |
856 |
1#$uftp://harvarda.harvard.edu$kguest |
856 |
42$3French version$uhttp://www.cgiar.org/ifpri/reports/0297rpt/0297-ft.htm |
856 |
42$3Essays from annual reports$uhttp://woodrow.mpls.frb.fed.us/publs/ar/index.html |
856 |
1#$uftp://wuarchive.wustl.edu/mirrors/info-mac/util/color-system-icons.hqx$s16874 bytes |
856 |
2#$utelnet://maine.maine.edu$nUniversity of Maine$t3270 |
856 |
1#$uftp://wuarchive.wustl.edu/mirrors2/win3/games/atmoids.zip$cdecompress with PKUNZIP.exe$xcannot verify because of transfer difficulty |
856 |
4#$zPart of the Ovid Mental Health Collection (MHC). Follow instructions on MedMenu page for Ovid login.$uhttp://info.med.yale.edu/medmenu/info%5Fcbc.html |
856 |
40$uhttp://www.ref.oclc.org:2000$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 |
2#$aanthrax.micro.umn.edu$b128.101.95.23 |
856 |
1#$amaine.maine.edu$cMust be decompressed with PKUNZIP$fresource.zip |
856 |
0#$akentvm.bitnet$facadlist file 1$facadlist file2$facadlist file3 |
856 |
0#$auicvm.bitnet$fAN2$hListserv |
856 |
2#$amadlab.sprl.umich.edu$nUniversity of Michigan Weather Underground$p3000 |
856 |
10$zFTP access to PostScript version includes groups of article files with.pdf extension$aftp.cdc.gov$d/pub/EIS/vol*no*/adobe$f*.pdf$lanonymous$qapplication/pdf |
856 |
4#$uhttp://susdl.fcla.edu/cgi-bin/cgiwrap/~fdl/fdlcgi?FA00000011%2Fjpg$yElectronic resource (JPEG) |
856 |
4#$uhttp://susdl.fcla.edu/cgi-bin/cgiwrap/~fdl/fdlcgi?FA00000011%2Fpdf$yElectronic resource (PDF) |

