Record Type 

BIB 

Input Standards 

Field (Full/Minimal)  
Optional/Optional  
1st Indicator Undefined  
Undefined  
2nd Indicator Undefined  
Undefined  
Subfields (R=Repeatable NR=Nonrepeatable)  Input Standards (Full/Minimal)  
ǂa  Number where instructions are found  Single number or beginning number of span (R)  Optional/Optional 
ǂb  Base number (R)  Required if applicable/Required if applicable 
ǂc  Classification number  Ending number of span (R)  Required if applicable/Required if applicable 
ǂf  Facet designator (NR)  Required if applicable/Required if applicable 
ǂr  Root number (R)  Required if applicable/Required if applicable 
ǂs  Digits added from classification number in schedule or external table (R)  Required if applicable/Required if applicable 
ǂt  Digits added from internal subarrangement or add table (R)  Required if applicable/Required if applicable 
ǂu  Number being analyzed (R)  Optional/Optional 
ǂv  Number in internal subarrangement or add table where instructions are found (R)  Required if applicable/Required if applicable 
ǂw  Table identification  Internal subarrangement or add table (R)  Required if applicable/Required if applicable 
ǂy  Table sequence number for internal subarrangement or add table (R)  Required if applicable/Required if applicable 
ǂz  Table identification (R)  Required if applicable/Required if applicable 
ǂ0  Authority record control number or standard number (R)  Optional/Optional 
ǂ1  Real World Object URI (R)  Optional/Optional 
ǂ6  Linkage (NR)  System supplied/System supplied 
ǂ8  Field link and sequence number (R)  Optional/Optional 
Definition 
Information about how a synthesized classification number or a portion of a synthesized classification number was built. Field 085 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. 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. For the Dewey Decimal Classification the base number (subfield ǂb) is always given first, followed by the location of add instructions (subfields ǂa and ǂc). 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 ǂb 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 ǂf. For more information, see Representation of DDC in MARC 21 Bibliographic Format: An Update. Examples


1st Indicator 
Undefined. The 1st indicator position is undefined and contains a blank.


2nd Indicator 
Undefined. The 2nd indicator position is undefined and contains a blank.


Subfields 

ǂa Number where instructions are found  Single number or beginning number of span  Number (single number or beginning number of span) where instructions are found.


ǂb Base number  Base classification number to which one or more other numbers are added. In many instances it may be the same as subfield ǂa. 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.


ǂc Classification number  Ending number of span  Ending number of a classification span under which an internal subarrangement or add instructions are found.


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


ǂr Root number  Initial digits of the pattern number or span when these digits are not added. If this subfield is present, subfield ǂs or ǂt must also be present to specify the digits that are added.


ǂs 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.


ǂt 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.


ǂu Number being analyzed  Repeated when the same 085 field is applicable to more than one number appearing in the same record.


ǂv 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.


ǂw 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.


ǂy 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.


ǂz Table identification  Identifies the table used in building a number. For a classification number span, subfield ǂz is given only once, before the first number.


ǂ0 Authority record control number or standard number  For information about subfield ǂ0, see Control Subfields. 

ǂ1 Real World Object URI  For information about subfield ǂ1, see Control Subfields. 

ǂ6 Linkage  Data that link fields when nonLatin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields. 

ǂ8 Field link and sequence number  For information about subfield ǂ8, see Control Subfields.


Indexing 
Field 085 is not indexed. 

MARC 21 
For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 085. 
This page last revised: August 27, 2020