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DATE: May 31, 2006

NAME: Definition of subfield $u (URI) in Field 852 (Location) in the MARC 21 Bibliographic and Holdings Formats

SOURCE: Prints & Photographs Division, Library of Congress

SUMMARY: This paper proposes the definition of subfield $u in Field 852 to contain a URI to link to information about the repository identified in $a and $b.

KEYWORDS: Subfield $u in field 852 (BD, HD); Location (BD, HD); URI; Uniform Resource Identifier



5/31/2006 - Made available to the MARC 21 community for discussion.

06/24/06 - Results of the MARC Advisory Committee discussion - Approved. The documentation will stress that the URI in subfield $u should link to information about the repository (recorded in subfields $a and $b) and not to holdings information recorded in subfield $p.

10/12/06 - Results of LC/LAC/BL review - Approved

Proposal No.: 2006-07: Definition of subfield $u (URI) in Field 852 (Location) in the MARC 21 Bibliographic and Holdings Formats


The MARC Advisory Committee has in recent years approved the addition of $u (URI) for a number of fields. These include fields 505, 514, 520, 530, 545, and 552. In each case, the addition of $u (URI) has resulted in facilitating user access to online information that is current, complete, and easily maintained.


Like many archival repositories, the Prints & Photographs Division lists its physical address in field 852 in order to help users of catalog records contact the repository for additional information about a collection or item. Providing a link to the Division's home page (its virtual or online address) would help users connect more quickly to general access information, such as repository hours, and to e-mail accounts to submit questions about a specific collection. Similar to the use of $u in Field 545 which links to lengthy biographical or historical data, $u in field 852 would connect users to information too extensive for a bibliographic record. These homepages, owing to their completeness and currency, have in many cases evolved to become the preferred source of information about the institution and collections. As a result patrons will be connected to the source and the context for item-level records regardless of the system in which they find the catalog record. Other stakeholders in the expansion of Field 852 to define subfield $u (URI) include any repository that provides name and address information in Field 852, such as the Manuscript Division at the Library of Congress. Note that field 856 is used to link to the actual resource being described in the record. 852$u would link to the repository that holds the item (regardless of whether the item is analog or digital), which is also recorded as an organization code or text in 852$a (Location) and (if applicable) $b (Sublocation).

Field 852 is defined as follows:

852 - LOCATION   (R)
      First - Shelving scheme
         # - No information provided
         0 - Library of Congress classification
         1 - Dewey Decimal classification
         2 - National Library of Medicine classification
         3 - Superintendent of Documents classification
         4 - Shelving control number
         5 - Title
         6 - Shelved separately
         7 - Source specified in subfield $2
         8 - Other scheme
      Second - Shelving order
         # - No information provided
         0 - Not enumeration
         1 - Primary enumeration
         2 - Alternative enumeration
   Subfield Codes
      $a - Location  (NR)
      $b - Sublocation or collection  (R)
      $c - Shelving location  (R)
      $e - Address  (R)
      $f - Coded location qualifier  (R)
      $g - Non-coded location qualifier  (R)
      $h - Classification part  (NR)
      $i - Item part  (R)
      $j - Shelving control number  (NR)
      $k - Call number prefix  (R)
      $l - Shelving form of title  (NR)
      $m - Call number suffix  (R)
      $n - Country code  (NR)
      $p - Piece designation  (NR)
      $q - Piece physical condition  (NR)
      $s - Copyright article-fee code (R)
      $t - Copy number  (NR)
      $x - Nonpublic note (R)
      $z - Public note  (R)
      $2 - Source of classification or shelving scheme (NR)
      $3 - Materials specified  (NR)
      $6 - Linkage (NR)
      $8 - Sequence number (NR)


Define subfield $u (Uniform Resource Identifier) in Field 852 of the MARC 21 Bibliographic and Holdings Formats


    852 ## $aLibrary of Congress$bPrints and Photographs Division$eWashington, D.C. 20540 USA

[Data in subfield $u is for the Library of Congress Prints and Photographs Division home page]

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