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856 - Electronic Location and Access (R)

MARC 21 Community Information - Concise

Contains the information needed to locate and access electronic information pertaining to a community service such as the service or event website or related resources. Subfields $y (Link text) and $z (Public note) may be used to specify the type of electronic information.

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 whenever the electronic filename varies (subfield $f), except when a single intellectual item 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.

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. 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)
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 electronic access data in a standard syntax. Field 856 is structured to allow for the creation of a URL from the concatenation of other separate field 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 and 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 (Method specified in subfield $2). Code from: Electronic Access Methods Code List.
$3 - Materials specified (NR)
$6 - Linkage (NR)
See the description of this subfield in Appendix A: Control Subfields.
$8 - Field link and sequence number (R)
See the description of this subfield in Appendix A: Control Subfields.
856 2#$$b128.101.95.23
856 1#$$cMust be decompressed with PKUNZIP$$s16874 bytes
856 1#$$dmirrors/info-mac/util$fcolor-system-icons.hqx
856 0#$akentvm.bitnet$facadlist file1$facadlist file2$facadlist file3
856 1#$$kguest
856 1#$aunmvm.bitnet$lanonymous
856 2#$$mRoy Tennant
856 3#$b1-202-7072316$j2400-9600$nLibrary of Congress, Washington, DC$oUNIX$rE-7-1$tvt100$zRequires logon and password
856 0#$akeptvm.bitnet$facadlist file1$s34,989 bytes$facadlist file2$s32,876 bytes$facadlist file3$s23987 bytes
856 2#$$nUniversity of Maine$t3270
856 3#$$b140.147.254.3$$t3270$tline mode (e.g., vt100)$vM-F 6:00 a.m.-21:30 p.m. USA EST, Sat. 8:30-17:00 USA EST, Sun. 13:00-17:00 USA EST
856 1#$$cdecompress with PKUNZIP.exe$d/mirrors2/win3/games$$xcannot verify because of transfer difficulty
856 42$3Finding aid$u

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