686 - Relationship to Source Note (R)
MARC 21 Classification - Full
October 2008
First Indicator
Type of relationship
0 - Number from other source edition
1 - Expansion
2 - Option
3 - Adaptation, other
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Second Indicator
Undefined
# - Undefined
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Subfield Codes
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$a - Number in edition described in field
084--single number or beginning number of span (R)
$b - Number in primary source edition--single number or
beginning number of span (R)
$c - Ending number of span (R)
$i - Explanatory text (R)
$o - Number where instructions are found--single number or
beginning number of span (R) |
$t - Topic (R)
$y - Table sequence number for
internal subarrangement or add table (R)
$z - Table identification (R)
$2 - Edition identifier (R)
$5 - Institution to which field applies (R)
$6 - Linkage (NR)
$8 - Field link and sequence number (NR) |
FIELD DEFINITION AND SCOPE
Information about the relationship of a number to the source
edition when the number is different from the standard number
for the same topic in the primary source edition. This field is
used for numbers based on a source other than the primary
source, expansions, implemented options, and adaptations. The
information in this field is intended primarily for computer
processing or to guide classifiers and is often not written in
a form adequate for public user display.
GUIDELINES FOR APPLYING CONTENT DESIGNATORS
■ INDICATORS
First Indicator - Type of relationship
Type of relationship between the number in the 153 field
and the standard number for the same topic in the source
edition.
0 - Number from other source edition
Classification number in field 153 is based on a source
other than the primary source. If the classification
number in field 153 is the implementation of an option
described in the other source edition, use indicator
value 2.
1 - Expansion
Classification number in field 153 represents a more
specific number in the same hierarchy as the standard
number in the primary source edition for the topic
identified in subfield $t. If this number is based on
another source edition, use indicator value 0.
2 - Option
Classification number in field 153 represents the
implementation of an option described in the primary
source or other source edition.
3 - Adaptation, other
Classification number in field 153 is different from
the number in the primary source edition for the topic
identified in subfield $t, and none of the types of
relationships described in the other indicator values
is applicable.
Second Indicator - Undefined
Undefined and contains a blank (#).
■ SUBFIELD CODES
$a - Number in edition described in field 084--single
number or beginning number of span
Classification number in the edition described in field 084
for the topic identified in subfield $t.
Subfield $a is not used if it would be the same as the
number in field 153.
$b - Number in primary source edition--single number
or beginning number of span
Standard number in the primary source edition for the topic
identified in subfield $t, or if there is no subfield $t,
then in subfield $j or field 153.
Subfield $b is not used if it would be the same as subfield
$o (Number where instructions are found).
$c - Ending number of span
Ending number of a classification number span cited in
field 686. The beginning number of the span is recorded in
subfields $a, $b or $o.
$i - Explanatory text
Explains the scope of the classification number. This
subfield is repeated when other subfields intervene in the
explanatory text.
$o - Number where instructions are found--single
number or beginning number of span
Number in the source edition where instructions are given
for the option that is being implemented in the number in
field 153. The subfield is used only for an option
described in the primary source edition or another source
edition (indicator value 2).
$t - Topic
Topic that is being added to or subtracted from the meaning
of the number in field 153.
Subfield $t is not used if it would be the same as subfield
$j (Caption) in field 153.
$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 686 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.
$2 - Edition identifier
Edition number, date, or other textual designation of the
classification scheme edition used as the source for the
classification number in field 153 when that source is not
the primary source.
Used with indicator value 0, and with indicator value 2
when the option is described in the other source edition.
This subfield is not used to record the edition identifier
of the primary source edition; that edition identifier is
recorded in subfield $c or $d of the 084 field.
$5 - Institution to which field applies
$8 - Field link and sequence number
■ EXAMPLES
Number from other source edition:
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| 084 |
8#$addc$bSistema de Clasificación$c20$ncontains parts of
edition 21 in revised Table 2 notation for former Soviet
Union and Table 6 expansions for North and South American
Languages$espa |
| 153 |
##$z2$4771$hEuropa Europa Occidental$hEuropa oriental
Rusia $hUcrania $jProvincia de Crimea |
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686 |
0#$221 |
Expansion:
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| 084 |
8#$addc$bClassificazione Decimale Dewey$c20$eita |
| 153 |
##$z2$a454126$hEuropa Europa occidentale$hPenisola
italiana e isole adiacenti Italia $hRegione
dell'Emilia-Romagna e San Marino$hProvincia di
Bologna$hNordovest della provincia di
Bologna$jCrevalcore |
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686 |
1#$z2$b4541 |
Option:
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| 084 |
8#$addc$bClassificazione Decimale Dewey$c20$eita |
| 153 |
##$a222.86$hReligione$hBibbia$hLibri storici dell'Antico
Testamento$hNeemia (Esdra 2)$jTobia |
| 683 |
2#$i(Opzione:
Classificare in$a229.22)$p253 |
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686 |
2#$o229.22 |
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| 084 |
8#$addc$bDewey
Onlu Siniflama ve Bagintili Dizin$c20$etur |
| 153 |
##$a412$hDil ve
dilbilim$hBelirli diller$hTürk dili$jStandart Türkçe'nin
kökenbilimi (etimolojisi) |
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686 |
2#$b494.352$o410 |
Adaptation, other:
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| 084 |
8#$addc$bDewey
Onlu Siniflama ve Bagintili Dizin$c20$etur |
| 153 |
##$z2$a56226$hTablo: Cografi Alanlar, Tarihi Dönemler,
Kisiler$hAsya Dogu (Orient) Uzakdogu$hOrta Dogu (Yakin
Dogu)$hEge Bölgesi (Bati Anadolu) ve Marmara Bölgesi
$hMarmara Bölgesi$jIstanbul |
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686 |
3#$tComprehensive works
and European portion of Istanbul
province$z2$b49618 |
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686 |
3#$tAsian portion of
Istanbul
province$z2$b563 |
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| 084 |
8#$addc$bClassificazione Decimale Dewey$c20$eita |
| 153 |
##$a641.815$hTecnologia (Scienze applicate)$hEconomia
domestica e vita familiare$hCibi e bevande
(Alimenti)$hConservazione, immagazzinamento, cucina degli
alimenti$hCucina di specifici tipi di piatti$hPiatti
preliminari e di accompagnamento $jPane e affini |
| 680 |
1#$iEsempî:
cialde, crackers, crêpes, focacce, panini, pizze,
schiacciate |
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686 |
3#$tPizza$b641.824 |
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| 084 |
8#$addc$bClassificazione Decimale Dewey$c20$eita |
| 153 |
##$a641.824$hTecnologia (Scienze applicate)$hEconomia
domestica e vita familiare$hCibi e bevande
(Alimenti)$hConservazione, immagazzinamento, cucina degli
alimenti$hCucina di specifici tipi di piatti$hPiatti
principali$jSformati di carne e torte di formaggio |
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686 |
3#$tPizza$a641.815S |
SCHEME-SPECIFIC CONVENTIONS
Dewey Decimal Classification - Only longer
numbers in the same hierarchy are expansions.
CONTENT DESIGNATOR HISTORY
$y - Table sequence number for internal subarrangement or
add table [NEW, 2008]