Library of Congress >> MARC >> Classification >> Tracings and References >> 253

253 - Complex See Reference (R)


MARC 21 Classification - Full
October 2008

First Indicator
Type of reference
0 - See reference
1 - Standard subdivisions do-not-use reference
2 - Class elsewhere reference

Second Indicator
Undefined
# - Undefined


Subfield Codes
$a - Classification number referred to-single number or beginning number of span (R)
$c - Classification number referred to-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)

FIELD DEFINITION AND SCOPE

Explanatory text and the Classification number referred to that are required when a see reference relationship exists between classification numbers that cannot be adequately conveyed by one or more simple cross references generated from a 453 (Invalid Number Tracing) or 553 (Valid Number Tracing) tracing field.

A see also reference that directs the user to a related number is contained in field 353 (Complex See Also Reference).

A cross reference display may be constructed from the 153 and 253 fields of the record. Field 153 (Classification Number) contains the classification number or span referred from. Field 253 contains the explanatory text for the reference and the other classification number(s) or span(s) referred to. When several reference notes are associated with a classification number, each may be recorded in a separate field or they may be combined and recorded in a single field. References providing information about use of numbers discontinued in whole or in part for a topic and about topics relocated in whole or in part to other numbers are contained in field 685 (History Note).


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

First Indicator - Type of reference
Type of reference contained in the field.
0 - See reference
See reference to a classification number or span is in another classification record.
084 0#$alcc
[Library of Congress Classification]
153 ##$aHE198$hTransportation and communications$jGovernment ownership (General)
253 0#$iFor government ownership of a specific mode of transportation, see the mode
1 - Standard subdivisions do-not-use reference
Instructions prohibiting the use of one or more standard subdivisions.
084 0#$addc$c22
[Dewey Decimal Classification]
153 ##$a130.112$hPhilosophy, parapsychology and occultism, psychology$hParapsychology and occultism$hPhilosophy and theory$hSystems$jForecasting and forecasts
253 1#$iDo not use for comprehensive works on parapsychological and occult forecasting and forecasts; class in$a133.3.$iClass a specific type of forecasting or forecast with the type, without adding notation$z1$a0112 $ifrom Table 1, e.g., astrological methods of forecasting$a133.5
2 - Class elsewhere reference
Instructions to class a specified topic in another number that is not a subdivision of the number in field 153 (Classification Number). Often the reference cannot be made into a tracing because it does not refer to a particular classification number but is a general instruction.
084 0#$addc$c22
[Dewey Decimal Classification]
153 ##$a303.6$hSocial sciences$kSpecific topics in sociology and anthropology$hSocial processes$jConflict and conflict resolution
253 2#$iClass conflict in a specific social relation with the relation, e.g., racial conflict$a305.8;$iclass a specific conflict considered an historical event with the event in$a900,$ie.g., disturbances of May-June 1968 in France$a944.0836
Second Indicator - Undefined
Undefined and contains a blank (#).

SUBFIELD CODES

$a - Classification number referred to-single number or beginning number of span
Either a single classification number or the beginning number of a classification number span to which reference is made from the classification number(s) in field 153 of the record.
084 0#$addc$c22
[Dewey Decimal Classification]
153 ##$612.39$hTechnology (Applied sciences)$hMedicine and health$hHuman physiology$kSpecific functions, systems, organs$hDigestion$jMetabolism
253 2#$iFor metabolism within a specific function, system, or organ, see the function, system, or organ, e.g., metabolism of plasma$a612.116
084 0#$afcps
[Canadian PS8000 Classification]
153 ##$aPS8005$hCanadian literature$hGeneral$jSocieties
253 2#$iSocieties devoted to literature in general are classed in$aPN21$cPN29
$c - Classification number referred to-ending number of span
Ending number of a classification number span to which reference is made from the classification number(s) in field 153 of the record.
084 0#$addc$c22
[Dewey Decimal Classification]
153 ##$a745.674$hThe arts. Fine and decorative arts$hDrawing and decorative arts$hDecorative arts$hCalligraphy, heraldic design, illumination$hIllumination of manuscripts and books$jIlluminated manuscripts and books by language
253 2#$iClass illuminated manuscripts and books in specific languages produced in specific countries and localities in$a745.67093$c745.67099
$i - Explanatory text
Explanatory text of the see reference or see note. The text may be broken up by subfield $a or $c data and may be only a connector term, such as e.g. or and.
084 0#$alcc
[Library of Congress Classification]
153 ##$zKF1$a7.5$c7.529$hTable of form divisions (20 nos.)$hStatutes. Regulations. Rules of practice$hFederal legislation$hRegulations. Rules of practice$jParticular regulations or rules of practice (or groups of regulations or rules adopted as a whole)
253 0#$iFor rules of practice before a separately classed agency, see the issuing agency
[The example is for a table record, as identified in 008/06 (Kind of record), code b (Table).]
084 0#$addc$c22
[Dewey Decimal Classification]
153 ##$a003$hComputer science, information, general works$jSystems
253 2#$iClass systems in a specific subject or discipline with the subject or discipline, plus notation$z1$a011 $ifrom Table 1, e.g., systems theory in the social sciences$a300.11
[A Complex See Reference must include all of the instructions needed for applying the table to the number.]
$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 a classification number recorded in field 253 belongs, if the classification number is part of a table. For a classification number span, subfield $z is given only once, before the first number. Subfield $z is input before the first element of the classification number in the first subfield $a. The identification of the table by which a classification number or span is further sub-arranged is contained in field 762 (Table Identification).
084 0#$addc$c22
[Dewey Decimal Classification]
153 ##$z1$a089$hStandard subdivisions$hHistory and description with respect to kinds of persons$jEthnic and national groups
253 2#$iClass persons treatment (e.g., biography) of members of a specific ethnic or national group in$z1$a0923$iclass treatment with respect to specific ethnic and national groups in places where they predominate in$z1$a091$c099. $iClass treatment with respect to miscellaneous specific kinds of persons of a specific ethnic or national group with the kind of person in$z1$a081$c088, $ie.g., Chinese children$z1$a083
[The reference note is too complex to be included in field 453 (Invalid Number Tracing) or field 553 (Valid Number Tracing).]
$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.

INPUT CONVENTIONS

Applicable input conventions - Input conventions described in the X53 Classification Numbers-General Information section are also applicable to this field.
Display constants - Display constants for a reference instruction phrase may be system generated on the basis of the field tag. However, because several types of standard wording may be used for see references, it may not be desirable to use display constants. In cases where display constants are not used, all terms to be displayed are recorded explicitly in field 253 subfield $i (Explanatory text).

SCHEME-SPECIFIC CONVENTIONS

Scheme-specific conventions - Scheme-specific conventions described in the X53 Classification Numbers-General Information section are also applicable to this field.
Library of Congress Classification - For LCC, field 253 is used for the following situations:

CONTENT DESIGNATOR HISTORY

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

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