MARC 21 Concise Classification: Location and Alternate Graphics (8XX)

This is an ARCHIVED VERSION of the 2000 electronic edition of the MARC 21 Concise Formats. Please see www.loc.gov/marc/concise/ for the most up-to-date version of the electronic MARC 21 Concise Formats.

Field 856 and 880 are the only 8XX fields defined in the MARC 21 classification format at the present time.

• 856 - ELECTRONIC LOCATION AND ACCESS (R)
• 880 - ALTERNATE GRAPHIC REPRESENTATION (R)

856 - ELECTRONIC LOCATION AND ACCESS (R)

The information required to locate an electronic item. The information identifies the electronic location containing the item or from which it is available. It also contains information to retrieve the item by the access method identified in the first indicator position. 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 a library catalog.

Field 856 is repeated when the location elements vary (subfields $a, $b, $c). It is also repeated when more than one access method may be used, mirror sites are recorded, different formats/resolutions with different URLs are indicated, and related items are recorded.

In MARC 21 classification records, this field may be used to link an electronic resource intended to supplement the classification scheme, such as an image of a map in a table related to the classification of geographic names.

Indicators

• First - Access method
  A value that defines how the rest of the data in the field will be used. The value in this indicator position determines which subfields are appropriate.
  • # - No information provided
  • 0 - Email
    Indicates that access is through the Mail Transfer Protocol (MAILTP).
  • 1 - FTP
    Indicates that access is through the File Transfer Protocol (FTP).
  • 2 - Remote login (Telnet)
    Indicates that access is through remote login using an application such as Telnet.
  • 3 - Dial-up
    Indicates that access to the electronic resource is through a conventional telephone line ( dial-up). Additional information in subfields of the record may enable the user to connect to the resource electronically.
  • 4 - HTTP
  • 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 entity described in the record. Only value # (no information provided) is used for classification records.
  • # - No information provided
    Indicates that no information is provided about the relationship of the electronic resource described in the record.
  • 0 - Resource
  • 1 - Version of resource
  • 2 - Related resource
  • 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. The convention for a BITNET address is to add .bitnet.
• $b - Access number (R)
  The Internet Protocol (IP) numeric address associated with a host. This data changes frequently and is 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 logon to a remotely-accessed site.
• $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)
  The file transfer mode, which determines how the file is transferred through the network.
• $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 one location of the digital object has multiple identifiers (URIs). The field is repeated if the digital object has multiple locations.
• $v - Hours access method available (R)
• $w - Record control number (R)
• $x - Nonpublic note (R)
• $y - Link text (R)
  Used for display in place of the URL in subfield $u (Uniform resource identifier). When subfield $y is present, applications should use the contents of it as the link instead of subfield $u linking to the destination in subfield $u.
• $z - Public note (R)
• $2 - Access method (NR)
• $3 - Materials specified (NR)
• $6 - Linkage (NR) See Control Subfields
• $8 - Field link and sequence number (NR) See Control Subfields

Example

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880 - ALTERNATE GRAPHIC REPRESENTATION (R)

Indicators

• First - Same as associated field
• Second - Same as associated field

Subfield Codes

• $6 - Linkage (NR) See Control Subfields
• $a-z - Same as associated field
• $0-5 - Same as associated field
• $7-9 - Same as associated field

Examples

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