The Uniform Resource Identifier (URI), for example a URL or URN, which provides electronic access data in a standard syntax. This data can be used for automated access to an electronic resource through one of the Internet protocols. Subfield $u may be used to point to a page(s)/site(s) holding relevant technical information about an electronic resource. Repeatable
Notes on Field Contents
Electronic location and access field 856 provides detailed coded information for access, the mode of access note may be brief. It may begin with the words "Mode of access:" (EX 8) though other wording may be used (EX 9, 10).
856 ELECTRONIC LOCATION AND ACCESS
This field applies only to the whole item described in the record. It cannot be used to provide electronic access to a part of the item described in the record.
EX 1: 337 ##$aData is in extended ASCII character set
EX 2: 337 ##$aWritten in FORTRAN H with 1.5K source program statements
EX 3: 337 ##$aOperates on IBM 360 and 370 under OS SVS and OSMVS with 9K of internal memory
EX 4: 337 ##$aRequires IBM 2740 terminal with special narrow platen and form feeding features
EX 5: 337 ##$aDisk characteristics: Disk is single sided, double density, soft sectored
EX 6: 337 ##$aSystem requirements: IBM PC, 64K, with color card, 1 disk drive. Color monitor recommended.
EX 7: 337 ##$aMode of use: On line video or teletype terminal or with a small dedicated computer (e.g. PDP 8).
EX 8: 337 ##$aMode of access: World Wide Web
EX 9: 337 ##$aAccess through computer network
EX 10: 337 ##$aElectronic access through Internet
EX 11: 337 ##$aZahtjevi sustava za PDF datoteku: Adobe Acrobat Reader
EX 12: 337 ##$aZahtjevi sustava: mrežni preglednik; videopreglednik QuickTime
337 ##$aNačin pristupa: World Wide Web$uhttp://www.nsk.hr/qtvr/donji-pocetna.htm
System requirement to view the video session on the website described in the record is video viewer QuickTime. It can be found at the URL entered in subfield $u in the first field 337.
This field may contain the name and address of the publisher, distributor, or other source for acquisition. It may also include the stock number, the physical medium, and the terms of availability for the catalogued item or a different physical format version of the item.
Optional. Not repeatable.
Indicator 1: blank (not defined)
Indicator 2: blank (not defined)
$a Source for Acquisition/Subscription Address
The name and/or address of a source for acquisition, including subscription address, of an item. Repeatable.
$b Stock Number
The number associated with the item by the supplier to facilitate distribution of the item. If the stock number is the ISBN or ISSN, it need not be repeated in this field. Repeatable.
The medium(s) in which the item is available. Repeatable (EX 3).
The price of the item in monetary or other units. Repeatable.
$u Uniform Resource Identifier (URI).
The Uniform Resource Identifier (URI), for example a URL or URN, which provides electronic access data in a standard syntax. This data can be used for automated access to an electronic item using one of the Internet protocols. Subfield $u may be used to link to a site from which the document can be acquired (documents published by associations, institutions, etc.). Repeatable.
Notes on Field Contents
If the publisher's address in field 210 PUBLICATION, DISTRIBUTION, ETC. is the same as would appear in this field it need not be repeated in this field.
This field applies only to the whole item described in the record. It cannot be used to provide electronic access to an associated resource.
EX 1: 345 ##$aU.S. Bureau of the Census$bC CPS 68 003
The source for acquisition and order number of a computer file.
EX 2: 345 ##$aFreytag, Berndt und Artaria$bBestell Nr. 5406
The publisher and order number for a map.
EX 3: 345 ##$aNational Technical Information Service$bPB 363547$cpaper copy$d$4.00 $cmicrofiche$d$3.00
The document distribution service, order number, available physical media, and prices for a technical report.
EX 4: 210 ##$aWashington, D.C.$b1649 K ST., NW, Washington, 20065$cWider Opportunities for Women$d1979 printing, c1975
345 ##$aWider Opportunities for Women, 1649 K St., NW, Washington, D.C. 20065.
The full name and address of the publisher are given in both the 210 and the 345 field.
EX 5: 210 ##$aToronto$cThe Chapter$d1975 1976
345 ##$aMultiple Sclerosis Society, Metropolitan Toronto Chapter, 13a Bloor St. West, Toronto, Ont. M5S lN5, Canada
The full name and address of the publisher, when the information was given in abbreviated form in the 210 field.
4 - - LINKING ENTRY BLOCK
STRUCTURE OF LINKING ENTRY FIELDS
This structure applies to all 4-- linking entry fields.
Definition and Scope of Fields
"The primary purpose of UNIMARC is to facilitate the international exchange of bibliographic data in machine readable form between national bibliographic agencies. UNIMARC may also be used as a model for the development of new machine readable bibliographic formats" — Purpose and Scope of UNIMARC.
It is therefore important that the UNIMARC format be hospitable to other MARC formats: otherwise conversion to and from UNIMARC is difficult or even impossible.
For this reason the technique of embedded fields has been supplemented by a technique using standard subfields. The structure of the agency's records will determine which system of linking entry fields is used.
Where there is a choice of system, the agency should weigh the advantages of the linking entry system, which allows fuller although more complex entries, against the advantages of the standard subfield system, which is easier to implement.
A statement that linking fields are present or absent together with a note of the type of contents in such linking fields, should be given in the documentation to accompany exchange records. For details, see Appendix K.
Within the Linking Entry Fields Section, both methods are described in the order: (A) embedded fields technique then (B) the standard subfields technique. All examples illustrate both methods.
Each linking entry field in a record will contain subfields that identify the item to which the link is being made. The data in this field should be sufficient to identify the record for the item being linked to, or, if there is no record, to identify the item itself.
In the following list the fields are labelled by the type of record to which the link is being made, e.g. 410 SERIES is used in a sub series record to link to the series of which it is a part.
The following fields are defined:
Series, supplements, etc.
412 Source of Excerpt or Offprint 413 Excerpt or Offprint