453 - Invalid Number Tracing (R)
MARC 21 Classification - Concise
2008
Tracing for a cross reference from an invalid classification number.
Indicators
First - Source of classification number
0 - Schedule
1 - Table
Second - Undefined
# - Undefined
Subfield Codes
$a - Classification number element--single number or beginning number of span (R)
$c - Classification number element--ending number of span (R)
$h - Caption hierarchy (R)
Caption for each higher level of the caption hierarchy that precedes the caption
for a classification number or span that is contained in subfield $j
(Caption). The caption at the highest level is recorded in the first subfield
$h. The caption at each successive level is recorded in sequence in
separate subfields $h up to and including the level that precedes the
caption contained in subfield $j. Captions for all levels of the
hierarchy are recorded in the field. If the caption in subfield $j is
the highest level of the hierarchy, subfield $h is not used. (However,
some systems may wish to omit some levels of the hierarchy for display purposes.)
A caption hierarchy for classification numbers in a summary number span in the
Dewey Decimal Classification is contained in subfield $k
(Summary number span caption hierarchy).
$i - Reference instruction phrase (NR)
$j - Caption (NR)
Lowest caption in the caption hierarchy for a classification number or span.
$k - Summary number span caption hierarchy (R)
Caption at a level higher than the last for a summary number span when the
classification scheme identified in field 084 (Classification Scheme and Edition)
is the Dewey Decimal Classification. Caption hierarchies for single
classification numbers, defined numbers spans, or other types of summary number
spans are contained in subfield $h. The last caption in the caption
hierarchy for a summary number span in field 153 (008/07, Type of number, code c
for summary number span) is recorded in subfield $j.
$t - Topic (NR)
Topic to which the tracing applies.
$w - Control subfield (NR)
/0 - Special relationship
/1 - Hierarchical relationship
/2 - Reference display
/3 - History reference
$y - Table sequence number for internal subarrangement or add table (R)
$z - Table identification (R)
$8 - Field link and sequence number (R)
Examples
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| 453 |
0#$wj$aH61.5$hSocial Science (General)$hTheory. Method. Relation to other subjects$jStatistical methods
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| 453 |
0#$wj$aNA3640.52$hArchitecture$hArchitectural decoration$jPainted decoration (Color use)
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| 453 |
0#$wmnna$a621.3883320288$hTechnology (Applied sciences)$hEngineering and allied operations$hApplied physics$hElectrical, magnetic, optical, communications, computer
engineering; electronics, lighting$hElectronics, communications engineering$kSpecific communications systems$hTelevision$hComponents and devices$hVideorecorders and videorecordings$hMiscellany$hAuxiliary techniques and procedures; apparatus, equipment,
materials$jMaintenance and repair
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| 453 |
1#$wm$z4$a0148$hSubdivisions of Individual Languages and Language Families$hPhilosophy and theory$hLanguage and communication$jAbbreviations and symbols$tabbreviations and symbols as part of writing
systems
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| 453 |
0#$wm$a130.112$h##$a133.3$hPhilosophy, parapsychology and occultism, psychology$hParapsychology and occultism$hPhilosophy and theory$hSystems$jForecasting and forecasts$tcomprehensive works on parapsychological and occult
forecasting and forecasts
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| 453 |
00$wj$aHD1501.2$hIndustries. Land use. Labor$hAgricultural economics$jLandlord
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| 453 |
1#$wanna$z2$a71335$hGeographic Areas, Historical Periods, Persons$kSpecific continents, countries, localities;
extraterrestrial worlds$kThe modern world; extraterrestrial worlds$hNorth America$hCanada$hOntario$kSouthern Ontario$hLake Erie region$jSt. Thomas
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| 453 |
0#$wanna$a652.5$hTechnology (Applied sciences)$hManagement and auxiliary sciences$kAuxiliary services$hProcesses of written communication$jWord processing
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