050 - Library of Congress Call Number (R)
MARC 21 Bibliographic - Full
October 2000
First Indicator Existence in LC collection # - No information provided 0 - Item is in LC 1 - Item is not in LC
|
Second Indicator Source of call number 0 - Assigned by LC 4 - Assigned by agency other than LC
|
|
|
Subfield Codes
|
$a - Classification number (R) $b - Item number (NR) $3 - Materials specified (NR)
|
$6 - Linkage (NR) $8 - Field link and sequence number (R)
|
FIELD DEFINITION AND SCOPE
Classification or call number that is taken from Library of Congress
Classification or LC Classification Additions and Changes. The brackets
that customarily surround alternate class/call numbers are not carried in the MARC
record; they may be generated based on the presence of repeated $a
subfields.
Second indicator values distinguish between content actually assigned by the Library of
Congress and content assigned by an organization other than LC.
Note that only subfield $u is locally defined. The entire field description
is repeated here for ease of use of this document.
GUIDELINES FOR APPLYING CONTENT DESIGNATORS
■ INDICATORS
First Indicator - Existence in LC collection Whether or not the item is contained in the LC collections.
# - No information provided Used for all call numbers assigned by agencies other than the Library of
Congress.
0 - Item is in LC Item is in the LC collections under the call number given in the field.Other agencies should use this value when transcribing from LC cataloging copy
on which the call number is neither enclosed within brackets nor preceded by a
Maltese cross.
|
|
|
|
|
|
|
|
|
|
050 |
00$aZ695.7$b.B37 1980
|
1 - Item is not in LC Item is not in the LC collections, or that it is not shelved under that
number.Used by other agencies when transcribing from LC copy on which the call number
appears in brackets or is preceded by a Maltese cross. Brackets that
customarily surround call numbers for items not in LC are not carried in the
MARC record; they may be generated for display.
Second Indicator - Source of call number Whether the source of the class/call number is the Library of Congress or another
organization.
0 - Assigned by LC Used when an institution is transcribing from LC cataloging copy.
4 - Assigned by agency other than LC
■ SUBFIELD CODES
$a - Classification number Classification number portion of the call number. The source of the classification
number is Library of Congress Classification and the LC
Classification-Additions and Changes. Subfield $a is repeated
to record an alternative class number. The alternate class number is recorded
following the last subfield of the call number. If the alternate class number also
includes an item number, the item number is included in the same subfield
$a as the alternate class number; it is not separately subfielded.
|
|
|
|
|
|
|
|
|
|
050 |
00$aQC861.2$b.B36
|
050 |
00$aZ695.7$b.B37 1980
|
050 |
00$aZ7164.N3$bL34 no. 9$aZ7165.R42$aHC517.R42
|
050 |
00$aRC951
|
$b - Item number Item number portion of the call number. An item number is the Cutter, date, term,
etc. that is added to a classification number to distinguish an item from any
other item assigned the same classification number.
Organizations that use the Cutter-Sanborn Three-Figure Author Table may
conform to Library of Congress item number practice by applying Subject
Cataloging Manual: Shelflisting conventions.
|
|
|
|
|
|
|
|
|
|
050 |
00$aJX1974.7$b.M5
|
050 |
00$aZ673.L7$bY
|
050 |
10$aHF5726$b.B27 1980
|
|
|
|
|
|
|
|
|
|
|
050 |
00$aE506.5 6th$bG
|
050 |
00$aE514.6 10th$b.T76 1905 [The above two call numbers are call numbers for regimental
histories.] |
$3 - Materials specified Part of the described material to which the field applies. The subfield is used
with archival-type materials; its use is parallel with the use of subfield
$3 in other fields.
$8 - Field link and sequence number
INPUT CONVENTIONS
LCCNs - When the call number field consists only of a class number (letters followed by numbers,
possibly including a period and also a space), no subfield $b is used.
|
|
|
|
|
|
|
|
|
|
050 |
00$aQA37
|
050 |
00$aE525.5 123d
|
General rule is that the item number part of the call number begins at the last capital
letter in the call number or the period, if present, preceding it.
|
|
|
|
|
|
|
|
|
|
050 |
00$aHF5549.5.R44$bM35
|
Exceptions to the general rule for item numbers:
If the call number is followed by only a date, with no Cutter number, the date is
contained in subfield $b.
If the call number is followed by volume numbering that includes uppercase letters,
these letters are ignored in locating the last capital letter.
|
|
|
|
|
|
|
|
|
|
050 |
00$aJX1977$b.A2 St/ESA/35
|
050 |
00$aHA1501$bA, Nr. 615
|
050 |
00$aHD28$b.Y555 vol. 55 Suppl.
|
If the call number begins with CS71, subfield $b contains the date.
If the call number is for a classification schedule (i.e., it is a call number beginning
with Z696.U5), the class letter(s) for the particular classification and any following
digit(s) are recorded in subfield $a (as part of the classification).
Subfield $b contains the date.
|
|
|
|
|
|
|
|
|
|
050 |
00$aZ696.U5E3$b1958
|
050 |
00$aZ696.U5H-HJ$b1981
|
Abbreviations
subser. and
Suppl. are recorded in subfield
$b, even when there is no item number.
Capitalization - Alphabetic characters in the classification number portion of the field are generally
uppercase.
Spacing - Any spaces that are desired as part of the call number must be input.
|
|
|
|
|
|
|
|
|
|
050 |
00$aDK274.3 1968$b.K39
|
050 |
00$aVM341$b.M9 vol. 48
|
050 |
00$aCS71.C323$b1977
|
Display Constant
Brackets that customarily surround call numbers for items not in LC or alternate
class/call numbers are not carried in the MARC record. They may be system generated as a
display constant associated with the first indicator value 1 or additional $a
subfields.
|
|
|
|
|
|
|
|
|
|
|
Content designated field:
|
050 |
10$aHF5726$b.B27 1980
|
|
Display example:
|
|
[HF5726.B27 1980]
|
CONTENT DESIGNATOR HISTORY
Indicator 1 - Existence in LC collection
# - No information provided
Prior to the definition of code 4 in the second indicator position in 1982, the first
indicator in the visual materials specifications was undefined. Visual materials
records created prior to 1982 may contain a # meaning undefined in
the first indicator position.
Indicator 2 - Series call number (SE) [OBSOLETE]
In the serials specifications, the use of the second indicator position to indicate
the type of series was made obsolete in 1976. The values were: 0 (No series
involved), 1 (Main series), 2 (Subseries), 3 (Sub-subseries).
Indicator 2 - Source of call number
# - No information provided [OBSOLETE]
Second indicator was defined in 1982. Prior to that change, 050 was an
agency-assigned field and contained only call numbers assigned by the Library of
Congress. LC records created before the definition of this indicator may contain a
blank (#) meaning undefined in this position.
$d - Supplementary class number (MU) [OBSOLETE, 1981]