MARC 21 Format for Classification Data: 761: Add or Divide Like Instructions (Network Development and MARC Standards Office, Library of Congress)

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 parts of a schedule (dividing it the way numbers in other parts of the schedule are divided).

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

Second Indicator - Combined note types

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.

An example is a statement of exceptions to an add note, where the pattern span cannot be used for a particular topic because the topic is classed elsewhere.

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

Classification number (single number or beginning number of span) under which an add table or further instructions are found.


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$z3B$a30872$hSubdivisions for the Arts, for Individual Literatures, for Specific Literary Forms$hSubdivisions for Works by or about More than One Author $kSpecific forms$hFiction$kFiction of specific scopes and kinds$hSpecific kinds of fiction$hAdventure fiction$jDetective, mystery, suspense, spy, Gothic fiction
761	#0$iAdd as instructed under$a102$c107

$b - Base number

Base classification number to which one or more other numbers will be added.


084	0#$alcc [Library of Congress Classification]
153	##$aNB201$cNB1114$hSculpture$hHistory$jSpecial countries
761	#0$iAdd country number in table to$bNB200
762	##$zN5 $imodified


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$a025.06001$c025.06999$hComputer science, information, general works$hLibrary and information sciences$hOperations of libraries, archives, information centers$hInformation storage and retrieval systems devoted to specific disciplines and subjects$jSpecific disciplines and subjects
761	#0$iAdd to base number$b025.06$inotation $d001$c999,$ie.g., MEDLINE$e 025.0661

$c - Classification number-ending number of span

Identifies the ending number of a classification number span. The beginning number of the span may be in subfield $a, $d, $e, $r or $x.


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$a725.1$hThe arts. Fine and decorative arts$hArchitecture$kSpecific aspects of architecture$kSpecific types of structures$hPublic structures$jGovernment buildings
761	#0$iAdd as instructed under$a721$c729

$d - Divided like number

Classification number or span that will be used as the pattern for constructing another classification number. If the number is part of a classification number span, subfield $c is used for the ending number in the span.


084	0#$alcc [Library of Congress Classification]
153	##$aND1314$cND1314.6$hPainting$hSpecial subjects of painting$hPortraits. Group portraits. Self-portraits$hHistory$hSpecial countries$hEurope$jGreat Britain
761	#0$iDivide like$dND1309$cND1309.6


084	0#$addc$c21 [Dewey Decimal Classification]
153	##$a016$hGeneralities$hBibliography$kBibliographies and catalogs of individuals, of works by specific classes of authors, of anonymous and pseudonymous works, of works from specific places, of works on specific subjects or in specific disciplines$j Bibliographies and catalogs of works on specific subjects or in specific disciplines
761	#0$iAdd to base number$b016 notation$d001$c999,$ie.g., bibliographies of philosophy$e016.1,$iof novels$e016.80883

$e - Example class number

Example of the classification number resulting from the add or divide like instruction.


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$a780.0001$c780.0999$hThe arts. Fine and decorative arts$hMusic$jRelation of music to other subjects
761	#0$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 $n780.089166),$imusic and the performing arts$e780.079$i(not$n780.07902)

$f - Facet designator

Extra character(s) to be added to classification numbers that indicate facets.


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$a327.123$c327.129$hSocial sciences$hPolitical science (Politics and government)$hInternational relations$hForeign policy and specific topics in international relations$hEspionage and subversion$jEspionage and subversion by specific nations
761	#0$iAdd to base number$b327.12$inotation $z2$d3$c9$ifrom Table 2, e.g., espionage by France$e327.1244 ;$ithen for espionage and subversion by that country in another area add$f0$iand to the result add notation$z2$d1$c9 $ifrom Table 2, e.g., espionage by France in developing countries$e327.124401724
761	#0$iAdd$f00 $ifor standard subdivisions; see instructions at beginning of Table 1

$i - Explanatory text


084	0#$alcc [Library of Congress Classification]
153	##$aQC793.5.G552$cQC793.5.G5529$hPhysics$hNuclear and particle physics. Atomic energy. Radioactivity$hElementary particle physics$hSpecial nuclear and subnuclear particles, antiparticles, and families of particles, A-Z$jGluons
761	#0$iSubarrange like$dQC793.5.A22$cQC793.5.A229


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$a880.1$c888$hLiterature (Belles-lettres) and rhetoric$kLiteratures of specific languages and language families$hLiteratures of Hellenic languages. Classical Greek literature$jSubdivisions of classical Greek literature
761	#0$iAdd to base number$b88$ias instructed at beginning of Table 3, e.g., a collection of classical Greek literature$e880.8;$ihowever, observe the special interpretations of and exceptions to notation from Table 3 that appear below, e.g., classical Greek poetry of the ancient period$e881.01,$iclassical Greek epic poetry and fiction of the ancient period$e883.01

$n - Negative example class number

Example of the incorrect classification number for the topic used to illustrate the add or divide like instruction.


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$a780.0001$c780.0999$hThe arts. Fine and decorative arts$hMusic$jRelation of music to other subjects
761	#0$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 $n780.089166),$imusic and the performing arts$e780.079$i(not$n780.07902)

$r - Root number

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.


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$a014$hComputer science, information, general works$hBibliography$kBibliographies and catalogs of individuals, of anonymous and pseudonymous works, of works from specific places, of works on specific subjects or in specific disciplines$jBibliographies and catalogs of anonymous and pseudonymous works
761	#0$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 Russian$e014.71

$x - Other classification number

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.


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$a755$hThe arts. Fine and decorative arts$hPainting and paintings$kIconography$jReligion
761	#1$81.1$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	#2$81.2$ifor individual painters, see$x759.1$c759.9

$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

Table identification to which a classification number recorded in field 761 belongs. Subfield $z is not repeatable; it is input before the classification number to which it refers.


084	0#$addc$c22 [Dewey Decimal Classification]
153	##$z4$a24$hSubdivisions of Individual Languages$kDescription and analysis of the standard form of the language$hEtymology of the standard form of the language $jForeign elements
761	#0$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

SCHEME-SPECIFIC CONVENTIONS

Library of Congress Classification - May be used to record divide like notes only if it is impractical to indicate the subarrangement either in separate classification schedule or table records.

Dewey Decimal Classification - For the DDC, this field includes instructions about how many zeros to add for standard subdivisions. In these cases, the zeros are recorded in subfield $f (Facet designator). This field does not include general advice about number building, such as that at the start of DDC Table 3; such general advice is recorded in fields 683 (Application Instruction Note) or 684 (Auxiliary Instruction Note).

In DDC, a single add note may be a combination of an add note and a class elsewhere note or a relocation note, or (rarely) all three. The DDC add note at 659.29001-659.29999 is an example of a note with all three types. A system may display all three portions together in one paragraph, as is done in the printed volumes; it may display them as separate but consecutive notes; or it may suppress display of the add portion while displaying the class elsewhere or relocation part.

In DDC, subfield $d (Divided like number) is used for pattern numbers or spans when either a complete number or an incomplete number is added (concatenated). If digits are dropped from the beginning of the pattern number or span and only the remaining digits added, subfield $r (Root number) must be present to specify the digits dropped.

761 - Add or Divide Like Instructions (R)

FIELD DEFINITION AND SCOPE

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

■ SUBFIELD CODES

SCHEME-SPECIFIC CONVENTIONS

CONTENT DESIGNATOR HISTORY


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) $r - Root number (R) $t - Topic (R) $x - Other classification number (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 (NR)


761	#0$iAdd to base number$b025.29$inotation $z2$d1$c9$ifrom Table 2, e.g.,$tacquisition of materials from Latin America$e025.298