674 - Segmentation Instruction (R)
MARC 21 Classification - Full
October 2008
First Indicator
Undefined
# - Undefined
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Second Indicator
Undefined
# - Undefined
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Subfield Codes
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$a - Classification number-single number or beginning number of span (R)
$c - Classification number-ending number of span (R)
$i - Explanatory text (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 (NR) |
FIELD DEFINITION AND SCOPE
Number-building instructions to give segmentation information that cannot be expressed
using a single number or number span.
GUIDELINES FOR APPLYING CONTENT DESIGNATORS
■ INDICATORS
- Both indicators are undefined; each contains a blank (#).
■ SUBFIELD CODES
$a - Classification number-single number or beginning number of span
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| 674 |
##$iSegment as shown in$a599.2$c599.8$i, e.g.,$a636.9205$i,$a636.92/9$i,$a636.935/6
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$c - Classification number-ending number of span
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| 674 |
##$iSegment as shown in$a371.1$c371.8$i, e.g.,$a373.18235/2
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$i - Explanatory text Explains the segmentation instruction of the classification number. This subfield
is repeated when other subfields are embedded in the explanatory text.
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| 674 |
##$iSegment as shown in Table 2
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$y - Table sequence number for internal subarrangement or add table Sequence number or other identifier for an internal classification subarrangement
or add table. If the first or only add table found at a classification number is
the number 1, and succeeding integers are used for any following add tables found
at that number.
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| 674 |
##$iSegment notation with standard subdivisions as shown in
Table 1, and segment notation$z3B$a1$c8$y1$a801$c808$iand$z3B$a1$c8$y1$a91$c99$iafter the$z3B$a1$c8$y1$a8$ior$z3B$a1$c8$y1$a9$i, e.g.,$z3B$a1$c8$y1$a8/032$i,$z3B$a1$c8$y1$a9/9282
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$z - Table identification Identification of the table to which the classification number in the note
belongs. For a classification number span, subfield $z is given only
once, before the first number.
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| 674 |
##$iSegment as shown in table under$z3B$a1$c8$i, e.g.,$z3B$a1008/032
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$8 - Field link and sequence number
SCHEME-SPECIFIC CONVENTIONS
Dewey Decimal Classification - Primary use of this field is for the Dewey Decimal Classification. Segmentation
marks are used to show the end of the Abridged edition part of a Full edition number. In
the past, segmentation marks were also used to show where Table 1 (Standard subdivision)
notation was added to DDC numbers.