Electronic Location and Access Field (856)

USMARC Holdings Data

Electronic Location and Access Field (856)

856--ELECTRONIC LOCATION AND ACCESS

856Electronic Location and AccessRepeatable

Optional

First indicator:

Access method. Contains 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.

bNo information provided

Indicates that no information about access method is provided. This value is used when subfield g contains a URN and there is no URL recorded in subfield u. When subfield u contains a URL and subfield g is also present with a URN, the indicator value for the appropriate access method of the URL is given.

0Email

Indicates that access is through the Mail Transfer Protocol (MAILTP).

1File Transfer Protocol (FTP)

2Remote login (Telnet)

Indicates that access is through remote login using an application such as Telnet.

3Dial-up

Indicates that access to the electronic resource is through a conventional telephone line

4HTTP

Indicates that access to the electronic resource is through the Hypertext Transfer Protocol.

7Source specified in subfield 2

Second indicator:

Relationship. Contains 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.

bNo information provided

0Resource

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.

1Version 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.

2Related 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.

8No display constant generated

856Electronic Location and Accessp. 2

Subfield codes:

R‚aHost name

Contains 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.

‚bAccess number

Contains 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 changes frequently and is generated by the system, rather than statically stored.

R‚cCompression information

Contains information about the compression of a file, in particular, whether a specific program is required to decompress the file

R‚dPath

R‚fElectronic name

R‚gUniform Resource Name

Contains the URN for the electronic resource. A URN provides a globally unique location- independent identifier that can be used for identification of the resource and thus facilitates access to the resource. The content of the subfield includes the initials "urn".

‚hProcessor of request

Contains the username, or processor of the request; generally the data which precedes the "@" in the host address.

R‚iInstruction

Contains an instruction needed for the remote host to process a request.

‚jBits per second

‚kPassword

‚lLogon/login

Contains characters needed to connect (i.e., " logon", " login", etc. to an electronic resource or FTP site. For many general-use File Transfer Protocol servers, access is gained by entering the string "anonymous". An account number required for login may also be indicated. This subfield is used to record general-use logon strings which do not require special security.

R‚mContact person for access assistance

‚nName of location of host in subfield a

Contains the full name of the location of the host in subfield a, including its geographical location

‚oOperating system

‚pPort

Contains the portion of the address that identifies the process or service in the host. ‚q File transfer mode

Contains 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.
856Electronic Location and Accessp. 3

‚rSettings for data transfer

R‚sFile size

R‚tTerminal emulation

R‚uUniform resource locator (URL)

Contains the URL, which provides standard syntax for locating an object using existing Internet protocols. Field 856 is structured to create a URL from separate subfields.

R‚vHours access available

R‚wRecord control number for online services

R‚xNon-public note

R‚zPublic note

‚2Source of access

‚3Materials specified

‚6Linkage

Notes:

This field contains the required information to identify, locate and retrieve an electronic item. The data in this field allows for the electronic transfer of a file, the subscription to an electronic journal or logon to an electronic resource. In some cases only unique data elements are recorded which allow the user to access a locator table on a remote host containing the information needed to access the item.
Field 856 is repeated when the location data elements (subfields a, b and d) vary or when more than one access method may be used. It is also repeated when the electronic filename (subfield f) varies, except when a single intellectual item is divided into different parts for online storage or retrieval.
Telephone numbers are recorded in subfield b as follows:[country code]-[area code]-[telephone number]. Example: 61-49-215833 (a number in New South Wales, Australia); 1-202-7076237 (a number in Washington, D.C.). If an extension is applicable, include it after the telephone number preceded by x. Example: 1-703-3589800x515.

Codes used in subfield 2 specify the access method used to locate an electronic item.

The codes used are:

fileHost specific file name

gopherGopher protocol

newsUSENET news

nntpUSENET news using NTTP access

prosperoProspero Directory Service

waisWide Area Information Servers

856Electronic Location and Accessp. 4

Examples:

85640‚u

8564b‚u

8564b‚u ‚q text/html