956  Local Electronic Location and Access (R)

The fully qualified domain (host name) of the electronic location. Repeat subfield ǂa if there is more than one address for the same host.

The access number associated with a host. Use for Internet Protocol (IP) numeric address for an Internet resource. Use for a telephone number if access is through a telephone line (dial up). This data may change frequently and may be generated by the system, rather than statically stored.

The information about the compression of a file. If a specific program is required to decompress the file, it is noted here. Repeat subfield ǂc if two compression programs are used. Enter the latest compression first.

The directory and subdirectory names in which the file is stored. Use subfield ǂf for the file name itself. Use subfield ǂd for a surrogate path to the host in which complete and current access information is stored.

The electronic name of a file as it exists in the directory/subdirectory indicated in subfield ǂd on the host identified in subfield ǂa. Repeat subfield ǂf if a single logical file has been divided into parts and stored under different names. In this case, the separate parts should constitute a single bibliographic item. In all other cases, for a file that may be retrieved under different filenames, use multiple occurrences of field 956, each with its corresponding electronic name in subfield ǂf .

File names may include wildcard characters (e.g., * or ?). Use subfield ǂz to explain how the files are named.

The user name or processor of the request. Use for the data that precedes the at sign in the host address.

The instruction or command needed for the remote host to process a request.

The lowest and highest number of bits (binary units) of data that can be transmitted per second when connected to a host.

The syntax for recording the number of bits per second (BPS) is as follows: <Lowest BPS>-<Highest BPS>

• If only the lowest is given: <Lowest BPS>-
• If only the highest is given: -<Highest BPS>

The password required to access the electronic resource. An FTP site may require the user to enter an Internet Protocol address or may require a specific password. Electronically accessed catalogs may also require a password. Use for general passwords, not for security passwords. Omit subfield ǂk if a system that requires a password will accept anything entered as valid. Use subfield ǂz for password instructions.

The characters needed to connect (e.g., logon or login) to an electronic resource or FTP site. An account number required for login may also be indicated. For many general-use File Transfer Protocol servers, access is gained by entering the string anonymous. Use to record general-use logon strings which do not require special security. Do not use for security passwords.

The contact person at the host specified in subfield ǂa. For addresses relating to the content of the resource itself (i.e., the item represented by the title recorded in field 245) rather than access assistance, use field 270. Also use field 270, if the address data is the same.

The conventional name of the location of the host in subfield ǂa, including its physical (geographic) location.

The operating system used by the host specified in subfield ǂa. Conventions for the path and filenames may be dependent on the operating system of the host. For the operating system of the resource itself (i.e., the item represented by the title recorded in field 245), use field 753 subfield ǂc.

The part of the address that contains the process or service in the host.

The electronic format type which is the data representation of the resource, e.g., text/html, ASCII (American National Standard Code for Information Interchange), executable application, JPEG image or Postscript file. It provides information to allow people or machines to decide about the usability of the encoded data (e.g., the hardware or software required to display or to execute the data). It also determines the file transfer mode or how the data is transferred through the network.

Usually, a text file can be transferred as character data, which generally restricts the text to characters in the ASCII character set (i.e., the basic Latin alphabet, digits 0-9, most punctuation marks and a few special characters). Text files with characters outside the ASCII set or non-textual data (e.g., computer programs or images) must be transferred using another binary mode. Electronic format type may be taken from enumerated lists such as registered Internet Media Types (MIME types).

The settings used for transferring data.

• Parity: the parity checking technique used. Parity values are:
  • O for odd
  • E for even
  • M for mark
  • S for space
  • N for none
• Number Data Bits: the number of bits per character.
• Number Stop Bits: the number of bits to signal the end of a byte.

The syntax is as follows: <Parity>-<Number Data Bits>-<Number Stop Bits>

• If only the parity is given, the other elements of settings and their related hyphens are omitted: <Parity>
• If one of the other two elements is given, the hyphen for the missing element is recorded in its proper position:
  • <Parity>-<Number Data Bits>-
  • <Parity>--<Number Stop Bits>

The size of the file stored under the file name indicated in subfield ǂf. Size is generally expressed in terms of 8-bit bytes (octets). Repeat subfield ǂs and place it after the subfield ǂf to which it applies, if needed. Do not enter this information for electronic journals since the field relates to the entire title, not to a particular issue.

The emulation supported to specify a remote login. Use with 1st indicator value 2.

The Uniform Resource Identifier (URI), for example a URL or URN, provides electronic access data in a standard syntax. Use for automated access to an electronic item using one of the Internet protocols or by resolution of a URN. The structure of field 956 allows for the creation of a URI from the concatenation of the other 956 subfields. Use subfield ǂu instead of those separate subfields or in addition to them. Repeat subfield ǂu if digital object has multiple identifiers (URIs).

For information about subfield ǂu, see Control Subfields.

The hours that access to the electronic resource indicated in field 956 is available. For systems and services, use field 307, not subfield ǂv.

The system control number of the related record. Precede the number with a MARC code for the agency to which the control number applies. Enclose the MARC agency code in parentheses. The data in subfield ǂw links field 956 to the MARC record having the same data in a control number field. See MARC Code List for Organizations, which also includes links to Canadian, United Kingdom, and German MARC Organization Code lists.

A note pertaining to the electronic location of the source identified in the field that is in a form not adequate for public display. A nonpublic note may contain processing information about the file at the location specified.

The link text that is used for display in place of the URL in subfield ǂu. When subfield ǂy is present, applications should use the contents of subfield ǂy as the link, instead of the content of subfield ǂu when linking to the destination in subfield ǂu. Subfield ǂu is independent of the 2nd indicator value.

A note pertaining to the electronic location of the source identified in the field that is in a form adequate for public display.

The code defined for use with 1st indicator value 7. Use subfield ǂ2 to record access methods other than the four main TCP/IP protocols specified in the 1st indicator.

The data in this subfield corresponds with the access schemes specified in Uniform Resource Locators (URL), a product of the Uniform Resource Identifiers Working Group of the IETF.

The Internet Assigned Numbers Authority (IANA) maintains a registry of URL schemes and defines the syntax and use of new schemes.

LC includes an authoritative list based on that standard in the Electronic Access Methods Code List.

The part of the described materials to which the field applies.

Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not manually add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields.