MARC 21 Format for Classification Data: 681: Classification Example Tracing Note (Network Development and MARC Standards Office, Library of Congress)

Note that documents the use of the classification number in field 153 (Classification Number) of the record as an example or reference in field 253 (Complex See Reference), 353 (Complex See Also Reference) and/or 6XX note fields of another record.

Primarily intended to serve as a tracing of the use of classification numbers in examples and notes to assist classifiers in updating records.

It permits the updating of the 253, 353, or 6XX fields in the related record when a change is made to a 153 field. It is often not written in a form adequate for public user display.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

■ SUBFIELD CODES

$a - Classification number-single number or beginning number of span

Classification number in field 153 of the record in which the classification number is cited.

Used to amplify the explanatory text of the note.

$c - Classification number-ending number of span

Ending number of a classification number span from field 153 of the other record in which the classification number is cited.

$i - Explanatory text

Explains the scope of the classification number. This subfield is repeated when other subfields intervene in the explanatory text.

Contains text such as Example under [...], and Confer from [...].

$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, succeeding integers are used for any following add tables found at that number.

$z - Table identification

Identification of the table to which the classification number in the note belongs, if the classification number recorded in field 681 is part of a table. 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#$alcc [Library of Congress Classification]
153	##$aHB1321$cHB1528$hEconomic theory. Demography$hDemography. Population. Vital events $jDeaths. Mortality
681	##$iExample under$aHB848$cHB3697 $iDemography.Population. Vital events


084	0#$alcc [Library of Congress Classification]
153	##$aHB848$cHB3697$hEconomic theory. Demography$jDemography. Population. Vital events
680	0#$iIncluding statistical works on specific aspects of population and vital events, as for example,$aHB1321$cHB1528$iMortality


084	0#$alcc [Library of Congress Classification]
153	##$aKF6571$cKF6594$hUnited States (General)$hPublic finance$hNational revenue$hParticular sources of revenue$hTaxation$hParticular taxes$hOther taxes on capital and income$jEstate, inheritance, and gift taxes
681	##$iExample under$aKF6296$cKF6297.5 $iTax saving. Tax planning


084	0#$alcc [Library of Congress Classification]
153	##$aKF6296$cKF6297.5$hUnited States (General)$hPublic finance$hNational revenue$hParticular sources of revenue$hTaxation$jTax saving. Tax planning
253	0#$iTax planning relating to particular taxes, except income tax, see these taxes, e.g.$aKF6571+$iEstate and gift taxes [The reference note in field 253 does not refer specifically to another number and cannot be made into a tracing.]


084	0#$alcc [Library of Congress Classification]
153	##$zG1$a.E645$hSubject subdivisions$hHuman and Cultural Geography. Anthropogeography. Human Ecology$hSocial and cultural geography. Civilizations$hIntellectual and aesthetic life. The arts$jTheaters. Drama. Motion pictures
681	##$iExample under$zG1$a.A85$iBiographical maps. Maps showing travels of individuals


084	0#$alcc [Library of Congress Classification]
153	##$zG1$a.A85$hSubject subdivisions$hSpecial category Maps and Atlases$jBiographical maps. Maps showing travels of individuals
680	0#$iClass maps showing special groups of people under the subject, e.g., actors are classified in .E645

SCHEME-SPECIFIC CONVENTIONS

Dewey Decimal Classification - Field is not used because the DDC uses field 765 (Synthesized Number Components), to track the use of classification numbers within synthesized numbers.

681 - Classification Example Tracing Note (R)

FIELD DEFINITION AND SCOPE

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

■ SUBFIELD CODES

■ EXAMPLES

SCHEME-SPECIFIC CONVENTIONS

CONTENT DESIGNATOR HISTORY


Subfield Codes
$a - Classification number-single number or beginning number of span (R) $c - Classification number-ending number of span (R) $i - Explanatory text (R) $y - Table sequence number for internal subarrangement or add table (R)	$z - Table identification (R) $6 - Linkage (NR) $8 - Field link and sequence number (R)