765 Synthesized Number Components (R) (Variable Data Field)
Field definition and scope: This field documents the components of a synthesized classification number and the location of the add instructions that were used. 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.
A synthesized number in field 153 (Classification Number) may be identified by code b in 008/12 (Synthesized number indication) . Synthesized numbers may also appear in other fields.
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.
Field 765 is repeatable .
Guidelines for applying Content Designators:
Indicators
First Field of number analyzed
Second Undefined; contains a blank (#)
Subfield Codes
$a Number where instructions are found - Single number or beginning number of span (R)
$c Number where instructions are found - Ending number of span (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)
$v Number in internal subarrangement or add table where instructions are found (R)
$w Table identification - Internal subarrangement or add table (R)
$y Table identification - Schedule (R)
$z Table identification - Table number (R)
Conventions: Dewey Decimal Classification (Scheme-Specific)
Related USMARC fields or documents:
008/12 Synthesized number indication
684 Auxiliary Instruction Note
761 Add or Divide Like Instructions
See also:
