| First Indicator | Second Indicator |
|---|---|
| Type of heading # - Basic 0 - Faceted |
Thesaurus 0 - Library of Congress Subject Headings 1 - LC subject headings for children's literature 2 - Medical Subject Headings 3 - National Agricultural Library subject authority file 4 - Source not specified 5 - Canadian Subject Headings 6 - Répertoire de vedettes-matière 7 - Source specified in subfield $2 |
| Subfield Codes | |
|---|---|
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Terms indicating the genre, form, and/or physical characteristics of the materials being described. A genre term designates the style or technique of the intellectual content of textual materials or, for graphic materials, aspects such as vantage point, intended purpose, characteristics of the creator, publication status, or method of representation. A form term designates historically and functionally specific kinds of materials distinguished by their physical character, the subject of their intellectual content, or the order of information within them. Physical characteristic terms designate historically and functionally specific kinds of materials as distinguished by an examination of their physical character, subject of their intellectual content, or the order of information with them.
Examples of genre terms for textual materials are: biographies, catechisms, essays, hymns, or reviews. Examples of form and physical characteristic terms are: daybooks, diaries, directories, journals, memoranda, questionnaires, syllabi, or time sheets.
May contain terms constructed from a faceted vocabulary. For each term found in the field, an identification is given as to the facet/hierarchy in the thesaurus from which the term came. In addition, identification is given as to which term is the focus term of the expression.
Standard published lists are used for the genre and form terms. The lists are identified either by the second indicator (Thesaurus) or by subfield $2 (Source of term).
First Indicator - Type of heading
Type of genre/form heading in the field.
Genre/form data is recorded in a single occurrence of subfield $a.
Each genre/form term is recorded in a separate subfield $a or $b. A subfield $c (Facet/hierarchy designation) precedes each term in subfields $a and $b; it denotes the facet/hierarchy of each term in a particular thesaurus.
Second Indicator - Thesaurus
Subject heading system or thesaurus used in constructing the subject heading.
Subject added entry conforms to and is appropriate for use in the Library of Congress Subject Headings (LCSH) and the Name authority files that are maintained by the Library of Congress.
Conforms to LCSH is defined as:
Subject added entry conforms to the "AC Subject Headings" section of the Library of Congress Subject Headings and is appropriate for use in the LC Annotated Card Program.
Subject added entry conforms to and is appropriate for use in the National Library of Medicine authority files.
Subject added entry conforms to and is appropriate for use in the National Agricultural Library subject authority file.
Subject added entry conforms to a controlled list that cannot be identified by second indicator values 0-3, 5-6 or by a code in subfield $2.
Field 653 (Index Term-Uncontrolled) is used to record terms that are not derived from controlled subject heading lists.
Subject added entry conforms to and is appropriate for use in the Canadian Subject Headings that is maintained by the Library and Archives Canada.
Subject added entry conforms to the Répertoire de vedettes-matière that is maintained by the Bibliothèque de l'Université Laval and/or name authority files maintained by libraries in Canada using French as the language of description.
Subject added entry conforms to a set of subject heading system/thesaurus building rules. The identifying code is given in subfield $2.
$a - Genre/form data or focus term
All genre, form, or physical characteristics data when the first indicator is #. For faceted headings (first indicator is value 0), it consists of the focus term. A focus term is the concrete thing forming the basis of the expression.
| 655 | #7$aBird's-eye views$y1874.$2gmgpc | ||||||||
| 655 | #7$aCartoons$y1952.$2gmgpc | ||||||||
| 655 | #7$aGampi fibers (Paper)$zJapan$y1955$2rbpap | ||||||||
| 655 | #2$aFestschrift. | ||||||||
| 655 | #2$aDiaries. | ||||||||
Heading: Laminated marblewood bust
| 655 | 07$ck$bLaminated$cm$bmarblewood$cv$abust.$2aat | ||||||||
$b - Non-focus term
Term other than that considered the focus in a faceted heading (first indicator is value 0).
Heading: Black Hmong cotton courtship balls
| 655 | 07$cd$bBlack$cf$bHmong$cm$bcotton$ck$bcourtship$ct$aballs.$2aat | ||||||||
$c - Facet/hierarchy designation
Facet/hierarchy for each term found in subfields $a and $b in faceted headings (first indicator is value 0). The designations differ, depending on the thesaurus used (as specified by the code found in subfield $2). The designations and their associated facets/hierarchies can be found in the thesaurus identified by subfield $2. Subfield $c always precedes the data to which it is associated.
See the examples under the descriptions of subfields $a and $b.
$v - Form subdivision
Form subdivision that designates a specific kind or genre of material as defined by the thesaurus being used. Subfield $v is appropriate only when a form subject subdivision is added to a genre/form term.
$x - General subdivision
Subject subdivision that is not more appropriately contained in subfield $v (Form subdivision), subfield $y (Chronological subdivision), or subfield $z (Geographic subdivision). Subfield $x is appropriate only when a topical subdivision is added to a term with a first indicator of # (Basic).
| 655 | #7$aDictionaries$xFrench$y18th century.$2rbgenr | ||||||||
| 655 | #7$aPhotoprints$xColor$zPanama Canal Zone$y1900-1950.$2gmgpc | ||||||||
$y - Chronological subdivision
Subject subdivision that represents a period of time. Subfield $y is appropriate only when a chronological subject subdivision is added to a term.
| 655 | #7$aCompetition drawings$y1984.$2gmgpc | ||||||||
$z - Geographic subdivision
Geographic subject subdivision. Subfield $z is appropriate only when a geographic subject subdivision is added to a term.
| 655 | #7$aHymnals$zMassachusetts$y18th century.$2rbgenr | ||||||||
| 655 | #7$aSigning patterns (Printing)$zGermany$y18th century.$2rbpri | ||||||||
$0 - Authority record control number or standard number
See description of this subfield in Appendix A: Control Subfields.
$1 - Real World Object URI
See description of this subfield in Appendix A: Control Subfields.
$2 - Source of term
MARC code that identifies the source list from which the index term was assigned. It is used only when the second indicator position contains value 7 (Source specified in subfield $2). Code from: Genre/Form Code and Term Source Codes.
| 655 | #7$aEmblem books$zGermany$y17th century.$2rbgenr | ||||||||
| 655 | #7$aLithographs$zGermany$y1902.$2gmgpc | ||||||||
$3 - Materials specified
Part of the described materials to which the field applies.
| 655 | #7$3Municipal Fire Station records$aFire reports$zAtlanta, Georgia$y1978.$2[thesaurus code] | ||||||||
$5 - Institution to which field applies
See description of this subfield in Appendix A: Control Subfields.
| 655 | #7$aAnnotations (Provenance)$zSweden$y18th century.$2rbprov$5MH-H | ||||||||
$6 - Linkage
See description of this subfield in Appendix A: Control Subfields.
$8 - Field link and sequence number
See description of this subfield in Appendix A: Control Subfields.
Punctuation - Subfield preceding subfield $2 in field 655 ends with a mark of punctuation or a closing parenthesis.
| 655 | #7$aDiaries$zBelgium.$2 [thesaurus code] | ||||||||
Term followed by a subject subdivision does not end with a mark of punctuation unless the preceding term ends with an abbreviation, initial/letter, open date, or other data that end with a mark of punctuation.
| 655 | #7$aPrayer books$zRhode Island$y18th century.$2 [thesaurus code] | ||||||||
Spacing - No spaces are used in initialisms, acronyms, or abbreviations. A data element that contains an open-ended date ends with one space when it is followed by a subject subdivision.
Subfield $y Imprint Date Data - Imprint date (i.e., the date found in 260$c) may be used in subfield $y of field 655. In subfield $y, the date data are recorded following Library of Congress Rule Interpretations 21.30M. Brackets are not used even though they may be present in 260$c. When the dates are preceded by alphabetic data in subfield $y, the first letter of the alphabetic data is capitalized, e.g., Not before [imprint date]; Not after [imprint date]; Ca. [imprint date].
| 260 | ##$a [place of publication] :$b [publisher] ,$c[1885] | ||||||||
| 655 | #7$aAddresses$zMassachusetts$zBoston$y1885.$2rbgenr | ||||||||
Display Constant
| - | [dash associated with the content of subfield $v, $x, $y, and $z] |
Dash (-) that precedes a subdivision in an extended genre/form heading is not carried in the MARC record. It may be system generated as a display constant associated with the content of subfields $v, $x, $y, and $z.
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Content designated field :
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| 655 | #7$aAgenda$xWeekly$y1980-1985.$2 [thesaurus code] | ||||||||
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Display example: Agenda-Weekly-1980-1985.
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In headings having a first indicator 0 (Faceted), the dash (-) that precedes any non-focus term that follows a focus term is not carried in the MARC record. It may be generated as a display constant associated with subfield $b.
Until field 755 (Added Entry-Physical Characteristics) was made obsolete in 1995, physical characteristics were recorded in field 755 instead of field 655.