Library of Congress >> MARC >> Bibliographic >> 01X-09X >> 085

085 - Synthesized Classification Number Components (R)


MARC 21 Bibliographic - Full
October 2008

First Indicator
Undefined
# - Undefined

Second Indicator
Undefined
# - Undefined


Subfield Codes
$a - Number where instructions are found-single number or beginning number of span (R)
$b - Base number (R)
$c - Classification number-ending number of span (R)
$f - Facet designator (R)
$r - Root number (R)
$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)
$v - Number in internal subarrangement or add table where instructions are found (R)
$w - Table identification-Internal subarrangement or add table (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

Information about how a synthesized classification number or a portion of a synthesized classification 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 085 is given for each instruction.


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

SUBFIELD CODES

$a - Number where instructions are found-single number or beginning number of span
$b - Base number
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 085 fields is the number resulting from the immediately preceding addition.
$c - Classification number-ending number of span
Ending number of a classification number span under which an internal subarrangement or add instructions are found.
$f - Facet designator
Extra character(s) to be added to classification numbers that indicate facets.
$r - Root number
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
Digits that have been added from a classification number in a schedule or external table to make up the synthesized number.
$t - Digits added from internal subarrangement or add table
Digits that have been added from an internal subarrangement or add table to make up the synthesized number.
$u - Number being analyzed
Repeated when the same 085 field is applicable to more than one number appearing in the same record.
$v - Number in internal subarrangement or add table where instructions are found
Number (single number or beginning number of span) in an internal subarrangement or add table under which add instructions are found.
$w - Table identification-Internal subarrangement or add table
Classification number (single number or beginning number of span) under which an internal subarrangement or add table is found.
$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, and succeeding integers are used for any following add tables found at that number.
$z - Table identification
Identifies the table used in building a number. 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

082 00$81$a346.0469516$222
085 ##$81.1$b346.046 $a346.046$r333$s95
085 ##$81.1$b346.046 $a346.046$r333$s95
The Dewey number in the 082 field--346.0469516--means law providing for government control and regulation of biological resources for the sake of conserving them. The first 085 field shows that the number 346.04695 was built with 346.046 Law of government control and regulation of specific kinds of natural resources plus 95 from 333.95 Biological resources, following the instructions at 346.046. The second 085 field shows that the number 346.0469516 was built with 346.04695 plus 16 Conservation from the first add table under 333.7-333.9, as instructed under 333.7-333.9.
082 04$81$a599.0994$c22
083 0#$82$a 598.0994$222
085 ##$81.1$b599 $z1$s09
085 ##$81.2$b599.09 $z1$a093$c099 $z2$s94
085 ##$82.1$b598 $z1$s09
085 ##$82.2$b598.09 $z1$a093$c099 $z2$s94
The first two 085 fields show how the Dewey number in the 082 field - 599.0994 - was built. The first 085 field shows that 599.09 was built with 599 Mammals plus 09 Geographic treatment from Table 1 Standard subdivisions. The second 085 field shows that 599.0994 was built with 599.09 plus 94 Australia from Table 2 Areas, following instructions at 093-099 in Table 1. The second t wo 085 fields show how the Dewey number in the 083 field - 598.0994 - was built.

INPUT CONVENTIONS

Dewey Decimal Classification - Primary use for this field is for the Dewey Decimal Classification, which is based on the concept of number building. Field 085 is repeated each time an addition is made to the base number.
Order of subfields - For the Dewey Decimal Classification the base number (subfield $b) is always given first, followed by the location of add instructions (subfields $a and $c). When there are multiple additions to a synthesized number, a cumulative base number (the number which resulted from the previous addition) is used in subfield $b of the following 085 field. 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).

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