Library of Congress >> MARC >> Classification >> 76X >> 768

768 - Citation and Preference Order Instructions (R)

MARC 21 Classification - Full
October 2008
First Indicator
Type of instruction
0 - Citation and preference order note
1 - Table of preference

Second Indicator
Undefined
# - Undefined

Subfield Codes
$a - Classification number-Single number or beginning number of span (R)
$c - Classification number-Ending number of span (R)
$e - Example class number (R)
$i - Explanatory text (R)
$j - Caption (R)
$n - Negative example class number (R) 		$t - Topic used as example of citation and preference order instruction (R)
$x - Exception to table of preference (R)
$y - Table sequence number for internal subarrangement or add table (R)
$z - Table identification-Table number (R)
$6 - Linkage (NR)
$8 - Field link and sequence number (NR)

FIELD DEFINITION AND SCOPE

Note or table with instructions about the order in which elements are to be applied in synthesizing a classification number or instructions about preference for the classification of different characteristics of a topic.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

First Indicator - Type of instruction
Type of instruction note.
0 - Citation and preference order note
Note that contains instructions about the order in which elements are to be applied in synthesizing a classification number or instructions about preference for the classification of different characteristics of a topic.
1 - Table of preference
Part of a table of preference for the classification of different characteristics of a topic.
Second Indicator - Undefined
Undefined and contains a blank (#).

■ SUBFIELD CODES

$a - Classification number-Single number or beginning number of span
Single classification number or the beginning number of a span that is part of the citation and preference order note or table.
$c - Classification number-Ending number of span
Ending of a classification number span that is part of the citation and preference order note or table.
$e - Example class number
Example of the correct classification number for the topic used to illustrate the citation and preference order instruction.
$i - Explanatory text
Text of the citation and preference order note or table.
$j - Caption
Caption for the immediately following classification number in a table of preference. This caption usually matches the caption in field 153 (Classification Number) for that classification number.
$n - Negative example class number
Example of the incorrect classification number for the topic used to illustrate the citation and preference order instruction.
$t - Topic used as example of citation and preference order instruction
$x - Exception to table of preference
Start of an exception note in a table of preference.
$y - Table sequence number for internal subarrangement or add table
Sequence number or other identifier for an internal classification subarrangement or add table. If the first or only add table found at a classification number is the number 1, and succeeding integers are used for any following add tables found at that number.
$z - Table identification-Table number
Identification of the number of the table to which a classification number recorded in field 768 belongs. For a classification number span, subfield $z is given only once, before the first number.
$6 - Linkage
See the description of this subfield in Appendix A: Control Subfields.
$8 - Field link and sequence number
See the description of this subfield in Appendix A: Control Subfields.

■ EXAMPLES

084 0#$addc$c21
153 ##$a382.093$c382.099$hSocial sciences$hCommerce, communications, transportation$kInternal and international commerce (trade)$hInternational commerce (Foreign trade)$hHistorical, geographic, persons treatment$jInternational commerce in specific continents, countries, localities
683 2#$81.2$i(Option: Give priority in notation to the continent, country, locality requiring local emphasis, e.g., libraries in United States class trade between United Kingdom and United States in$a382.0973041)
768 0#$81.1$iGive priority in notation to the continent, country, locality emphasized. If emphasis is equal, give priority to the one coming first in Table 2
 
Display example:
382.093 - International commerce in specific continents, countries, localities
  Give priority in notation to the continent, country, locality emphasized. If emphasis is equal, give priority to the one coming first in Table 2 International commerce in specific continents, countries, localities (Option: Give priority in notation to the continent, country, locality requiring local emphasis, e.g., libraries in United States class trade between United Kingdom and United States in $a382.0973041)
084 0#$addc$c21
153 ##$a808.1$c808.7$hLiterature (Belles-lettres) and rhetoric$hRhetoric and collections of literary texts from more than two literatures$kRhetoric$jRhetoric in specific literary forms
768 0#$iObserve table of preference under$a800
084 0#$addc$c21
153 ##$a641.563$hTechnology (Applied sciences)$hHome economics and family living $hFood and drink$kFood preservation, storage, cooking$hCooking$hCooking for special situations, reasons, ages$jCooking for health, appearance, personal reasons
768 0#$iUnless other instructions are given, class a subject with aspects in two or more subdivisions of$a641.563$iin the number coming first, e.g.,$tlow-carbohydrate, low-calorie cooking for persons with diabetes$e641.56314$i(not$n641.5635$ior$n 641.5638)
084 0#$addc$c21
153 ##$a331$hSocial sciences$hEconomics$kEconomics of labor, finance, land, energy $jLabor economics
768 1#$81.1$iUnless other instructions are given, observe the following table of preference, e.g.,$tcompensation of women in banking$e331.42813321$i(not$n331.2813321$ior$n331.7613321)
768 1#$81.2$jChoice of vocation$a331.702
768 1#$81.3$jLabor force by personal characteristics$a331.3$c331.6
768 1#$81.4$jLabor force and market$a331.1
768 1#$81.5$jConditions of employment$a331.2
768 1#$81.6$jLabor unions (Trade unions), labor-management (collective) bargaining and disputes$a331.8
768 1#$81.7$jLabor by industry and occupation$a331.7$x(except$a331.702)
[Since this is a table of preference (indicated by value 1 in the first indicator) separate 768 fields are used, ordered by subfield $8.]
 
Display example:
331 - Labor economics
  Unless other instructions are given, observe the following table of preference, e.g., compensation of women in banking 331.42813321 (not 331.2813321 or 331.7613321)
    Choice of vocation: 331.702
    Labor force by personal characteristics: 331.3-331.6
    Labor force and market: 331.1
    Compensation and other conditions of employment: 331.2
    Labor unions (Trade unions), labor-management
    (collective) bargaining and disputes: 331.8
    Labor by industry and occupation: 331.7
    (except 331.702)
084 0#$addc$c21
153 ##$z1$a0$jStandard Subdivisions
768 1#$81.1$iUnless other instructions are given, observe the following table of preference, e.g.,$tlanguage and communication in education and research$z1$e07$i(not$z1$n014):
768 1#$81.2$jSpecial topics$z1$a04
768 1#$81.3$jPersons$z1$a092
768 1#$81.4$jAuxiliary techniques and procedures; apparatus, equipment, materials$z1$a028$x(except$z1$a0288)
768 1#$81.5$jDrafting illustrations$z1$a0221
768 1#$81.6$jEducation, research, related topics$z1$a07$x(except$z1$a074,$z1$a075,$z1$a076,$z1$a077)
768 1#$81.7$jManagement$z1$a068
768 1#$81.8$jPhilosophy and theory$z1$a01$x(except$z1$a0112,$z1$a014)
768 1#$81.9$jThe subject as a profession, occupation, hobby$z1$a023
768 1#$81.10$jThe subject for persons in specific occupations$z1$a024
768 1#$81.11$jDirectories of persons and organizations$z1$a025
768 1#$81.12$jPatents and identification marks$z1$a027
768 1#$81.13$jCommercial miscellany$z1$a029
768 1#$81.14$jStandards$z1$a0218
768 1#$81.15$jFormulas and specifications$z1$a0212
768 1#$81.16$jOrganizations$z1$a0601$c0609
768 1#$81.17$jOrganizations (without subdivision)$z1$a06
768 1#$81.15$jHistory and description with respect to kinds of persons$z1$a08
768 1#$81.16$jTreatment by specific continents, countries, localities; extraterrestrial worlds$z1$a093$c099....
 
Display example:
              Table 1. Standard Subdivisions
Unless other instructions are given, observe the following table of preference, e.g.,language and communication in education and research 1 07 (not 1 014):
    Special topics: --04
    Persons: --092
    Auxiliary techniques and procedures;
    apparatus, equipment, materials: --028
      (except --0288)
    Drafting illustrations: --0221
    Education, research, related topics: --07
      (except --074, --075, --076, --077)
    Management: --068
    Philosophy and theory: --01
      (except --0112, --014)
    The subject as a profession, occupation, hobby: --023
    The subject for persons in specific occupations: --024
    Directories of persons and organizations: --025
    Patents and identification marks: --027
    Commercial miscellany: --029
    Standards: --0218
    Formulas and specifications: --0212
    Organizations: --0601-609
    Organizations (without subdivision): --06

SCHEME-SPECIFIC CONVENTIONS

Dewey Decimal Classification - A see reference that serves also as a preference order note is recorded in field 253 (Complex See Reference) or field 553 (Valid Number Tracing). An add or divide like note that serves also as a citation order note is recorded in field 761 (Add or Divide Like Instructions). An optional citation and preference order instruction is contained in field 683 (Application Instruction Note).

Order of display of the fields in the record is not necessarily related to the order of the tags. For instance, if an option note is given in field 683 and field 768 contains the citation and preference order instructions for the standard schedule, the standard instructions must be given first. Subfield $8 is used to link and sequence 6XX and 76X fields.

If the instruction is that of a table of preference each entry is recorded in a separate 768 field. If subfield $8 is used, the sequence number is assigned according to the order of the elements in the table.

CONTENT DESIGNATOR HISTORY

$y - Table sequence number for internal subarrangement or add table [NEW, 2008]
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