685 - History Note (R)
MARC 21 Classification - Concise
2007
This is an ARCHIVED VERSION of the
2007 electronic edition of the MARC 21 Concise
Formats. Please see loc.gov/marc/concise/
for the most up-to-date version of the electronic MARC 21
Concise Formats.
Information about the history of the use and meaning of a
classification number that is contained either in field 153
(Classification Number) unless a 453 (Invalid Number Tracing)
or 553 (Valid Number Tracing) field contains code a (History
reference, field 685 used) in control subfield $w/3 (History
reference).
Indicators
First - Result of change
Result of the change recorded in
field 685 to the meaning of the number in field 153, 453, or
553.
0 - Completely new number
1 - Completely vacated number
2 - Partially changed number
3 - Reused after being vacated
4 - Immediately reused
8 - Other
Second - Type of history information
0 - Relocation
1 - Formerly
2 - Discontinuation
3 - Expansion
8 - Other
Subfield Codes
$a - New number-single number or beginning number of span (R)
Used to amplify the explanatory text of the note.
$b - Previous number-single number or beginning number of
span (R)
Old number from which the topic has been moved. If the old
number is the same as the number in field 153, 453, or 553,
this subfield is not used.
$c - Classification number-ending number of span (R)
$d - Date of implementation at authoritative agency (NR)
$e - Local implementation date (NR)
$f - Title and publication date (NR)
Code or a title and publication date string that identifies
the source where the classification number change first
appeared if the change occurred in other than a published
edition identified in subfield $2 (Edition number). The
field may also contain a volume and number if appropriate,
following the title and publication date or coded data.
$i - Explanatory text (R)
Explains the scope of the classification number. This
subfield is repeated when other subfields intervene in the
explanatory text.
$t - Topic (R)
Topic that is being added to or subtracted from the meaning
of the number in field 153, 453, or 553 of this or another
record.
$z - Table identification (R)
$2 - Edition number (R)
$5 - Institution to which field applies (R)
$8 - Field link and sequence number (NR)
Examples
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685 |
01$tMultimedia systems,
interactive video, comprehensive works on computer
graphics and computer sound
synthesis$iall formerly located
in$a006.6$d19960930
$221 |
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685 |
12$iProvision
discontinued because without meaning in
context$d19960930$221 |
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685 |
22$iUse of this number
for$tcooperation$idiscontinued;
class in$a158$d19960930
$221 |
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685 |
10$tCritical appraisal
of a person's work$irelocated
to$z1$a092$d19650501
$217 |
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685 |
31$tMen$iformerly
located
in$z1$b088041$d19890306
$220 |
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685 |
41$tYiddish$iformerly
located
in$b437.947$d19960930
$221 |
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685 |
42$iUse of this number
for$tcomprehensive works on Old Low
Germanic languages$idiscontinued; class
in$a439$d19960930
$221 |
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685 |
40$tOld
Frisian$irelocated
to$a439.2$d19960930
$221 |
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685 |
88$iThis schedule is
extensively revised, 370.1, 370.7, 375-377, and
378.14-378.19 in particular departing from earlier
editions. A comparative table giving both old and new
numbers for relocated topics, and equivalence tables
showing the numbers in the old and new schedules appear
in volume 1 of this
edition$d19960930$221 |
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685 |
03$iExpanded
from$a796.324$tNetball
$d19960930$221 |
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685 |
88$iExcept for military
science (355-359), this schedule is new and has been
prepared with little or no reference to previous
editions. Most numbers have been reused with new
meanings. A comparative table giving both old and new
numbers for a substantial list of topics and equivalence
tables showing the numbers in the old and new schedules
appear in volume 1 of this
edition$d19960930$221 |
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685 |
01$tData processing.
Computer science$iformerly located
in$b001.6$d19850501
$fDDC 004-006, data processing and
computer science and changes in related disciplines,
1985$219 |
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685 |
03$tSocialization by
the
family$d19820315$fDDC
301-307, sociology, 1982$219 |
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685 |
01$tQuantum
electrodynamics$iformerly located
in$b537.67$d19990901
$fNew and Changed Entries, September
1999$221 |
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685 |
20$tPopulation size and
composition$irelocated
to$a304.6$d19960930
$221 |
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685 |
01$tHainan Province
(Hainan Sheng)$iformerly located
in$z2$b5127$d19910501
$220 |
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