MARC 21 Concise Classification: Number Building Fields (76X)

This is an ARCHIVED VERSION of the 2000 electronic edition of the MARC 21 Concise Formats. Please see www.loc.gov/marc/concise/ for the most up-to-date version of the electronic MARC 21 Concise Formats.

Fields 761-768 provide instructions for building onto classification numbers from sources within the schedule and tables of the scheme identified in field 084 (Classification Scheme and Edition). Such fields are highly structured, and many are intended to assist the classifier in constructing classification numbers. The information in these fields is not written in a form adequate for public display.

Footnotes containing instructions that apply to several classification numbers are converted to the appropriate 6XX or 76X field.

761 - ADD OR DIVIDE LIKE INSTRUCTIONS (R)

Information necessary to construct a classification number by adding numbers from other parts of a schedule or from a table or by basing it on numbers defined in other part of a schedule (dividing it the way numbers in other parts of the schedule are divided).

Indicators

First - Undefined
- # - Undefined
Second - Combined note types
A value that specifies whether the add or divide like instruction is combined with another type of instruction that is logically tied to the add or divide like note. If the note is a combination, it is split into separate but consecutive 761 fields according to note type and the second indicator value shows which type is contained in each 761 field.
- 0 - Not a combined note
- 1 - Add or divide like portion of a combined note
- 2 - Class elsewhere portion of a combined note
- 3 - Relocation portion of a combined note

Subfield Codes

$a - Number where instructions are found--single number or beginning number of span (R)
$b - Base number (NR)
$c - Classification number--Ending number of span (R)
$d - Divided like number (R)
$e - Example class number (R)
$f - Facet designator (R)
$i - Explanatory text (R)
$n - Negative example class number (R)
An example of the incorrect classification number for the topic used to illustrate the add or divide like instruction.
$r - Root number (R)
The initial digits of the pattern number or span when these digits are not added. If this subfield is present, subfield $d (Divided like number) must also be present to specify the digits that are added.
$x - Other classification number (R)
Classification numbers other than those that belong in one of the other defined subfields. If the number is part of a classification number span, subfield $c is used for the ending number in the span.
$z - Table identification (R)
$6 - Linkage (NR) See Control Subfields
$8 - Field link and sequence number (NR) See Control Subfields

Examples

761	#0$iAdd country number in table to$b910
761	#0$iAdd to base number$b025.29$inotation$z2$d1$c 9$ifrom Table 2, e.g., acquisition of materials from Latin America$e025.298
761	#1$81.1$iAdd to base number$b338.17$ithe numbers following$r63$iin$d633$c638$i e.g., rice or seed rice$e338.17318,$iforestry$e338.1749,$i forest products$e338.17498;$ihowever,
761	#2$81.2$ifor supply of timber in nature, see$x333.7511;
761	#2$81.3$ifor demand for timber, see$x333.7512
761	#1$81.1$iAdd to base number$b660.2844$ithe numbers following$r547.2$iin$d547.21$c547.29, $ie.g., fermentation$e660.28449;$ihowever,
761	#3$81.2$ipolymerization relocated from$x660.28448$ito$x668.92
761	#1$81.1$iAdd to base number$b333.85$ithe numbers following$r553$iin$d553.2$c553.9, $ie.g., tin$e333.85453,$iuranium$e333.854932;$i however,
761	#2$81.2$ifor fossil fuels, see$x333.82;
761	#2$81.3$ifor groundwater, see$x333.9104
761	#1$81.1$iAdd to base number$b759$ithe numbers following$z2$r4$iin notation$z2$d43$c48$ifrom Table 2, e.g., painting and paintings of France$e759.4;$ihowever,
761	#3$81.2$iindividual painters from countries of former Soviet Central Asia relocated from$x759.7$ito$x759.9584$c759.9587
761	#0$iAdd as instructed under$a102$c108
761	#0$iAdd country number in table to$bNB200
761	#0$iAdd to base number$b025.06$inotation$d001$c999, $ie.g., MEDLINE$e025.0661
761	#0$iDivide like$dND1309$cND1309.6
761	#0$iAdd to base number$b016 notation$d001$c999$ie.g., bibliographies of philosophy$e016.1,$iof novels$e016.80883
761	#0$iAdd to base number$b780.0$ithree-digit notation$d001$c999,$ie.g., music and literature$e780.08,$imusic and Welsh literature$e780.0891$i(not$n780.089166),$i music and the performing arts$e780.079$i(not$n780.07902)
761	#0$iAdd$f00$ifor standard subdivisions; see instructions at beginning of Table 1
761	#0$iSubarrange like$dQC793.5.A22$cQC793.5.A229
761	#0$iAdd to base number$b88$ias instructed at the beginning of Table 3 e.g., a collection of classical Greek poetry;$e881.008$ihowever, observe the special interpretations of and exceptions to notation from Table 3 that appear below, e.g., collections of classical Greek poetry of the medieval and Byzantine periods$e881.0208,$icritical appraisal of classical Greek epic poetry and fiction of the ancient period$e883.0109
761	#0$iAdd to base number$b014$ithe numbers following$r03$iin$d031$c039$i (but not notation 02 for books of miscellaneous facts), e.g., bibliographies and catalogs of anonymous and pseudonymous works in French$e014.41
761	#0$81.1$iAdd to base number$b755$ithe numbers following$r704.948$iin$d704.9482$c704. 9489,$ie.g., paintings of Holy Family$e755.56$i; however,
761	#0$iAdd to$z4$b24$inotation$z6$d1 $c9$ifrom Table 6, e.g., French words in the language$z4$e2441,$iFrench words in English$e422.441

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762 - TABLE IDENTIFICATION (R)

The identification of a table which provides an arrangement for or additions to the classification number or number span recorded in field 153. Field 762 is repeated for each table if more than one table applies to the classification number or number span recorded in field 153. If the classification number recorded in field 153 is itself part of a table, the identification of the table to which the classification number belongs is recorded in subfield $z of field 153.

Indicators

First - Table application sequence
- # - First
- 2 - Second
- 3 - Third
- 4 - Fourth
Second - Undefined
- # - Undefined

Subfield codes

$i - Explanatory text (R)
$z - Table number (NR)
$6 - Linkage (NR) See Control Subfields
$8 - Field link and sequence number (R) See Control Subfields

Examples

762	##$zH7$imodified
762	##$zN5$imodified
762	##$zG

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763 - INTERNAL SUBARRANGEMENT OR ADD TABLE ENTRY (R)

One entry in an internal classification subarrangement or add table. The entry may consist of a classification number and its associated caption, a note, or a see reference. A classification number that is part of an external table is recorded in field 153 (Classification Number) with the table identification recorded in subfield $z (Table identification) of that field. An internal table may also be coded as an external one and identified in subfield $z of field 153 to the record to which it applies. In this case, the table which provides the arrangement for or addition to the classification number or number span recorded in 153 is recorded in subfield $z of this field.

Indicators

First - Classification number validity
A value that specifies whether field 763 contains a standard valid, standard invalid, optional valid, optional invalid, or obsolete classification number. A standard classification number is one from the standard part of the schedules or tables; it may be valid or invalid for use in a bibliographic or authority record. An optional classification number is one which is provided as an optional alternative to the standard part of the schedule or tables; it may be valid or invalid for use in a bibliographic or authority record. An obsolete classification number is one that had been used in an earlier edition, but has been relocated to another number or discontinued.
- 0 - Not a classification number entry
- 1 - Standard valid classification number
- 2 - Standard invalid classification number
- 3 - Optional valid classification number
- 4 - Optional invalid classification number
- 5 - Obsolete classification number
Second - Type of classification number
A value that specifies whether field 763 contains a single number, a defined number span, or a summary number span.
- 0 - Single number
- 1 - Defined number span
- 2 - Summary number span
- 8 - Other

Subfield Codes

$a - Classification number--single number or beginning number of span (R)
$b - Base number (NR)
$c - Classification number--ending number of span (R)
$d - Divided like number (R)
$e - Example class number (R)
$h - Caption hierarchy (R)
A caption for each higher level of the caption hierarchy that precedes the caption in subfield $j (Caption) that is associated with a classification number as part of an internal subarrangement entry. A caption for a classification number in a summary number span in the Dewey Decimal Classification is contained in subfield $k (Summary number span caption hierarchy).
$i - Explanatory text (R)
$j - Caption (NR)
$k - Summary number span caption hierarchy (R)
The caption at a level higher than the last for a summary number span in the Dewey Decimal Classification scheme. Caption hierarchies for a single classification number, defined number span, or other type of summary number span are contained in subfield $h.
$m - Manual note (NR)
A note from the a classification manual that is part of an internal classification subarrangement. A reference from a schedule internal subarrangement to a manual is recorded in subfield $i (Explanatory text).
$n - Number where instructions are found (R)
$p - Corresponding classification field (R)
The field tag of the field in which the internal subarrangement data would appear if it were not part of an internal subarrangement. Subfield $p may be repeated for option notes to show that the note would appear in field 683 (Application Instruction Note) or in some other field if it were not an option.
$r - Root number (R)
The initial digits of the pattern number or span when these digits are not added. If this subfield is present, subfield $d must also be present to specify the digits that are added.
$s - See reference (R)
The classification number to which a see reference in an internal classification subarrangement refers.
$x - Other classification number (R)
Classification numbers other than those that belong in one of the other defined subfields.
$y - Type of division (R)
An identification of the type of division to which a table specified in subfield $z applies.
$z - Table identification (R)
$6 - Linkage (NR) See Control Subfields
$8 - Field link and sequence number (NR) See Control Subfields

Examples

763	08$81.3$iIncluding state documents$p680
763	08$81.34$iClass here comprehensive works on emergency therapy for specific diseases or kinds of diseases$p680
763	18$81.61$a071$ivs.$a 01$jEtiology vs. Microbiology$p684
763	08$81.12$iAdd to$b21$ithe numbers following$r352.1$iin$d352.105$c352.19, $ie.g., international administration$e211$p761
763	10$81.3$a62$kSpecific forms of action$hControl$jStandards
763	08$81.5$mDo not use$x06$mby itself under numbers whose meaning is limited to surgery, since surgery is a therapy. [. . .]$p684
763	08$81.9$iDo not use; class in$s027$p253
763	08$81.16$iAdd to$b009$ithe numbers following$z2$r1$iin notation$z2$d11$c18$ifrom Table 2, e.g., urban regions$e009732$p761
763	50$81.16$a[042]$hSpecial topics$jArchitecture for persons with disabilities$iRelocated to$x087$p685
763	08$iUnder each:
763	08$zG6041.S$yhistory
763	08$81.20$iClass persons of a specific period in$s01$c09,$iplus notation$z1$a092$ifrom Table 1$p253
763	08$81.14$i5 nos.
763	08$81.18$i(OPTIONAL PERIOD TABLE FOR SPANISH
763	30$81.29$a(5$j2000- )$p683
763	08$81.2$iAs modified under$x616.1$c616.9$p683 [ ... ]

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764 - RULE IDENTIFICATION (R)

An identification of a rule number that is used to build a number by applying a table. Each unique rule number may be translated into a sequence of steps used by a system to calculate the number in classification schemes that have multiple rules for building specific classification numbers.

Indicators

First - Undefined
- # - Undefined
Second - Undefined
- # - Undefined

Subfield Codes

$a - Rule number (NR)
Identifies a particular rule that is used to apply a specific table to a classification number or span in a classification scheme that has multiple number building rules.
$i - Explanatory text (R)
The textual form of the rule as a sequence of steps to be followed in building a number from a table applied to a classification number span.
$6 - Linkage (NR) See Control Subfields
$8 - Field link and sequence number (R) See Control Subfields

Examples

764	##$a1$iAdd table number to number in 153/a or to number specified in 761/b if present
764	##$a2$iSubtract 1 from number in 153/a and add table number to resulting number

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765 - SYNTHESIZED NUMBER COMPONENTS (R)

Information about how a synthesized number or a portion of a synthesized number was built. It traces the different components of a synthesized number, showing the different portions of the number and where the add instructions are given. If a number was built using two or more instructions, a separate field 765 is given for each instruction.
The information in this field is primarily intended to serve as a tracing of how classification numbers are synthesized to assist classifiers. It facilitates computer manipulation of synthesized numbers, both for validation that the numbers have been synthesized correctly and for index-building, to allow searching every use of a specific number.

Indicators

First - Field of number analyzed
A value that specifies the field containing the number being analyzed by the 765 field. This indicator facilitates different indexing of field 765 for public users trying to locate books on topics of interest and for classifiers and maintainers of the data base.
- 0 - 153 field
- 1 - Other field
Second - Undefined
- # - Undefined

Subfield Codes

$a - Number where instructions are found--single number or beginning number of span (R)
$b - Base number (R)
The base classification number to which one or more other numbers are added. In many instances it may be the same as subfield $a. When two or more additions are used to build one number, the base number for the second and following 765 fields is the number resulting from the immediately preceding addition.
$c - Number where instructions are found--Ending number of span (R)
$f - Facet designator (R)
Extra character(s) to be added to classification numbers that indicate facets.
$r - Root number (R)
The initial digits of the pattern number or span when these digits are not added. If this subfield is present, subfield $s or $t must also be present to specify the digits that are added.
$s - Digits added from classification number in schedule or external table (R)
$t - Digits added from internal subarrangement or add table (R)
$u - Number being analyzed (R)
Identifies the number being analyzed. Subfield $u is repeated when the same 765 field is applicable to more than one number appearing in the same record. If the number being analyzed is in field 153 (Classification Number), indicated by value 0 in the first indicator, this subfield need not be used unless both numbers in a classification number span are being analyzed.
$v - Number in internal subarrangement or add table where instructions are found (R)
$w - Table identification--internal subarrangement or add table (R)
$z - Table identification (R)
$6 - Linkage (NR) See Control Subfields
$8 - Field link and sequence number (R) See Control Subfields

Examples

765	0#$b362.196994$a616.9942$c616. 9949$r611$s2
765	0#$b346.046$a346.046$r333$s95
765	0#$b346.04695$a333.7$w333.7 $t16
765	0#$b372.1$a372.11$c372.18 $r371$s1
765	0#$b372.11$a371.1008$c371.1009 $f0$z1$s092
765	1#$b787.2$a784$c788$w 784$c788$t1$u787.219369
765	1#$b787.21$a784$c788$v 18$c19$r784.1$s9369$u787.219369
765	0#$b255.9$a255.91$c255.97 $r271.9$s1$u255.91
765	0#$b255.9$a255.91$c255.97 $r271.9$s7$u255.97
765	1#$b255.9$a255.91$c255.97 $r271.9$s72$u255.972$u255.97200941$u 255.97206
765	1#$b255.972$a255.1$c255.7 $f0$z1$s09$u255.97200941
765	1#$b255.972009$z1$a093$c 099$z2$s41$u255.97200941
765	1#$b255.972$a255.1$c255.7 $w255.1$c255.7$t06$u255.97206

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768 - CITATION AND PREFERENCE ORDER INSTRUCTIONS (R)

Instructions for determining either the order of the elements in a synthesized classification number or the preference for the classification of different characteristics of a topic.

Indicators

First - Type of instruction
- 0 - Citation and preference order note
- 1 - Table of preference
Second - 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)
The 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 (R)
An 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 (R)
$x - Exception to table of preference (R)
$z - Table identification--Table number (R)
$6 - Linkage (NR) See Control Subfields
$8 - Field link and sequence number (NR) See Control Subfields

Examples

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
768	0#$iObserve table of preference under$a800
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$n641.5635$io r$n641.5638)
768	1#$81.3$jLabor force by personal characteristics$a331.3$c331.6
768	1#$81.7$jLabor by industry and occupation$a331.7$x(except$a331.702)
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$z1$n 014):
768	1#$81.2$jSpecial topics$z1$a04
768	1#$81.7$jManagement$z1$a 068
768	1#$81.16$jTreatment by specific continents, countries, localities; extraterrestrial worlds$z1$a093$c099....

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