X55 Genre/Form Terms - General Information (Variable Data Field)
Each genre/form term field is unique in its definition and scope. For specific information, select from the list below.
155 Heading - Genre/Form Term (NR)
455 See From Tracing - Genre/Form Term (R)
555 See Also From Tracing - Genre/Form Term (R)
755 Established Heading Linking Entry - Genre/Form Term (R)
Record requirements: The National level record requirement
for the genre/form term fields is Mandatory if applicable, except for field 755 which is Optional. For the national level requirements by subfield, see the specific field.
Field repeatability: See the specific field for its repeatability
.
Guidelines for applying content designators:
The content designators identify the subelements occurring in genre/form term headings constructed according to generally accepted thesaurus-building conventions (e.g., Art & Architecture Thesaurus).
Genre terms for textual materials designate specific kinds of materials distinguished by the style or technique of their intellectual contents; for example, biographies, catechisms, essays, hymns, or reviews.
Form terms designate historically and functionally specific kinds of materials as distinguished by an examination of their physical character, characteristics of their intellectual content, or the order of information within them; for example, daybooks, diaries, directories, journals, memoranda, questionnaires, syllabi, or time sheets.
In the context of graphic materials, genre headings denote categories of material distinguished by vantage point, intended purpose, characteristics of the creator, publication status, or method of representation.
The indicators, subfield codes, and input conventions for the genre/form term fields 155, 455, 555, and 755 follow similar patterns. Guidelines for applying them are below. Subfields are grouped by type of entry.
For indicator and subfield code definitions and examples, National level (NLR) record requirements , and designator repeatability , see table below. An asterisk ( * ) in the column indicates that the requirement varies. See table in the specific field.:
Position | Description | NLR | Repeatability |
Field X55 | Genre/Form Terms | * | * |
Indicator: | |||
First | Undefined; contains a blank | M | |
Second | |||
155, 455, 555 | Undefined; contains a blank | M | |
755 | M | ||
0 | A | ||
1 | A | ||
2 | A | ||
3 | A | ||
4 | A | ||
5 | A | ||
6 | A | ||
7 | A | ||
Subfield code: | |||
Main term portion | |||
$a | M | NR | |
Subject subdivision portion | |||
$v | A | R | |
$x | A | R | |
$y | A | R | |
$z | A | R | |
Tracing and linking subfields | |||
$i | Reference instruction phrase [455, 555] | A | NR |
$w | Control subfield [455, 555, 755] | A | NR |
$0 | Record control number [555, 755] | A | R |
$2 | A | NR | |
$5 | Institution to which field applies [455, 555, 755] | A | R |
$6 | A | NR | |
$8 | O | R |
Display constant for X55 fields
Prior to the definition of the X55 fields, X50 (Topical Terms) fields were used for genre/form term headings.
Subfields $v - Record control number [755] [obsolete] [USMARC only]
$0 - Record control number [555, 755] [new]
$3 - Authority record control number [obsolete, 1997] [CAN/MARC only]
In USMARC, from 1993 to 1995, subfield $v was defined as Record control number in the 7XX Heading Linking Entry fields. When subfield $v was adapted for form subdivisions in MARC bibliographic and authority heading fields in 1995, subfield $v was redefined as Form subdivision. In 1997, subfield $0 was added as Record control number in 5XX and 7XX fields.
Related MARC fields or documents:
7XX Heading Linking Entries - General Information
880 Alternate Graphic Representation
Tracing and Reference Fields - General Information
MARC Code List for Organizations
Symbols and Interlibrary Loan Policies in Canada
See also:
