Saturday, October 24, 2015

Thursday, October 22, 2015

Tuesday, October 20, 2015

Library Cataloging Research

RDA Bibliography
RDA Bibliography


This new RDA Blog post discusses status and availability of researches on library descriptive cataloging with reference to Masters, M.Phil. and Ph.D. thesis and dissertations on library cataloging which may be available in print and/or online.

It argues that with the emergence of Resource Description & Access (RDA), as the successor of Anglo-American Cataloging Rules (AACR2), it becomes necessary to do quality research works on the descriptive cataloging using RDA and AACR2 and evaluating its significance and impact on librarianship and library services.

It seeks suggestions for potential topics on which researches should be carried out in Library Descriptive cataloging using RDA and AACR2

#RDABLOG #RDABIBLIOGRAPHY #RDA #CATALOGING

Friday, October 16, 2015

Subject Approach to Information in Libraries

Subject Approach to Information in Libraries


Subject Approach to Information in Libraries

Most of the users approach information sources not with names, who might have been responsible for their creation, but with a question that requires an answer, or a topic for study. Users seek documents or information on a particular subject. In order to make provision for this common approach, it is necessary to arrange documents on the shelf and entries in catalogs in such a way that items on a specific subject can be retrieved. In other words, it may be said that subject approach is very important in the access to and exploitation of documents in a library. Before we actually discuss the methods developed by librarians and information workers to meet this requirement, let us consider the question "What is a subject?" while talking about a subject we normally refer to a given area of knowledge, or the contents of a document of a given scope. A subject may be defined by:

a. an area of interest, 

b. an area in which an individual researcher or professional works, 

c. an area in which an individual writes, and 

d. an area of knowledge being studied.

Let us consider a well known area such as Physics. To understand this subject, let us first ask a student studying this subject, as to what constitutes this subject. Also, let us find out the definition of physics from a few dictionaries and encyclopedias. We may come across different definitions and different boundaries for this subject area alone. We may also find that different users and separate pieces of literature hold different perspectives on a subject. The points of divergence in perspective can be categorized into two types:

a. different labels (names) that are used for a subject, and 

b. different concepts about scope and associations with other subjects that are evident. 

Essentially, these factors form the basis of problems in identifying a satisfactory subject approach and the need to have a vast array of tools to explain the subject approach to knowledge or information. It is possible and convenient to select a particular view point on the scope, associations and labels for subjects which coincides with the way in which subjects are handled in the literature. In libraries, most devices for the organisation of knowledge concern themselves primarily with organizing documents, based on literary warrant. This approach is known as pragmatic approach. Collection dependency of the resulting tool. There is retrieval devices, and that is to build schemes, which depend upon theoretical views about the nature and structure of knowledge. This theoretical approach is important in determining the nature of subject devices required for the organisation of knowledge. A subject device normally seeks to fulfill two functions:

a. to show what a library or information center has on a particular subject; and 

b. to show what a library or information center has on related subjects. 

Different devices for the organization of knowledge place different emphasis based on the relative importance of these two functions. However, the two functions are inter-dependent and neither can be excluded without impairing the effectiveness of the other.

Classification schemes, as well as alphabetical indexing systems, attempt to fulfill both the basic functions mentioned earlier. The distinction arises from different emphasis. Classification schemes specialize in showing a network of subjects and displaying relationships between subjects while alphabetical indexing systems specialize in establishing specific labels for subjects and providing direct access to individual subjects. Also, it may be stated here that author and title catalogs enable the user to locate documents of which the user knows either the name of the author or title of the documents, while subject catalog enables him to find out documents of his interest even without knowing any of these items of information.

The subject approach may totally be alphabetical or it might be classified supported by alphabetical indexes. 

In a classified system, the arrangement of library materials is done using a classification scheme. The classification scheme provides a library with a systematic arrangement of materials according to their subject content. The second and the most commonly used method is indexing the library materials through the use of a subject heading list or controlled vocabulary. This method provides access to the intellectual content of a library. Classification provides a logical approach to the arrangement of documentary materials, whereas subject cataloging provides an alphabetic approach to the concepts discussed in these materials. These two methods offer two alternative modes of access to the library collection.

This new post of Librarianship Studies & Information Technology Blog answers following questions:
  • What are the Subject Approach to Information in Libraries
  • How library users seek information on a particular subject?
  • How library materials are arranged on shelves and catalogs to be located by subject?
  • What is a subject?
  • What methods and tools catalogers use to show what a library or information center has on a particular subject?
  • What methods and tools catalogers use to show what a library or information center has on related subjects?
  • How classification schemes are used for subject approaches?
  • How subject headings are used for subject approaches?

Source: (Chapter 1) Information Access Through The Subject : An Annotated Bibliography / by Salman Haider. - Online : OpenThesis, 2015. (408 pages ; 23 cm.)




SEE ALSO

ARTICLE AUTHOR
  • Salman Haider - Librarian Cataloger Author Blogger

ARTICLE HISTORY
  • Last Updated: 2018-05-25
  • Written: 2015-10-16

FEEDBACK
  • Help us improve this article! Contact us with your feedback. You can use the comments section below, or reach us on social media.

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Wednesday, October 14, 2015

022 - International Standard Serial Number (R)

MARC 21

First Indicator
Level of international interest
# - No level specified
0 - Continuing resource of international interest
1 - Continuing resource not of international interest
Second Indicator
Undefined
# - Undefined

Subfield Codes
$a - International Standard Serial Number (NR)
$l - ISSN-L (NR)
$m - Canceled ISSN-L (R)
$y - Incorrect ISSN (R) 
$z - Canceled ISSN (R)
$2 - Source (NR)
$6 - Linkage (NR)
$8 - Field link and sequence number (R) 

FIELD DEFINITION AND SCOPE

International Standard Serial Number (ISSN), a unique identification number assigned to a continuing resource, and/or any incorrect or canceled ISSN.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

 INDICATORS

First Indicator - Level of international interest
Value that specifies whether the continuing resource is of international interest or of local or ephemeral interest only.
# - No level specified
Level of international interest is unknown or not specified. Used by all institutions other than the ISSN Centers when recording the ISSN from an issue or from a bibliography.
0 - Continuing resource of international interest
Of international interest, thus a full record has been registered with the ISSN Network. Used for all continuing resources for which individual ISSN Centers receive ISSN requests from abstracting and indexing services or other ISSN Network centers. Also used for all other continuing resources that are not within the scope defined for value 1. This value may be input only by the ISSN Centers.
1 - Continuing resource not of international interest
Not of international interest, thus an abbreviated record has been registered with the ISSN Network. Used for continuing resources judged to be of local or ephemeral interest. ISSN Centers have defined publications of local or ephemeral interest as those in which interest is likely to be limited to a certain geographic area, e.g., local newspapers, or certain span of time, e.g., calendars of events. In case of doubt, value 0 is used. This value may only be input by the ISSN Centers.
Second Indicator - Undefined
Undefined and contains a blank (#).

 SUBFIELD CODES

$a - International Standard Serial Number
Valid ISSN for the continuing resource. ISSN may be generated for display.
022##$a0376-4583
$l - ISSN-L
ISSN that links together various media versions of a continuing resource. ISSN-L may be generated for display.
0220#$a1234-1231$l1234-1231
$m - Canceled ISSN-L
Canceled ISSN-L that has been associated with the resource. Each canceled ISSN-L is contained in a separate subfield $m. ISSN-L (canceled) may be generated for display.
0220#$a1560-1560$l1234-1231$m1560-1560
$y - Incorrect ISSN
Incorrect ISSN that has been associated with the continuing resource. Each incorrect ISSN is contained in a separate subfield $y. A canceled ISSN is contained in subfield $z.
ISSN (incorrect) may be generated for display.
0220#$a0046-225X$y0046-2254
$z - Canceled ISSN
Canceled ISSN that is associated with the continuing resource. Each canceled ISSN is contained in a separate subfield $z.
ISSN (canceled) may be generated for display.
0220#$a0145-0808$z0361-7106
0220#$z0027-3473
$2 - Source
ISSN Center responsible for assigning and maintaining ISSNs and related data.
Code from: ISSN National Centres code list online at: www.issn.org, National Centres.
$6 - Linkage
See description of this subfield in Appendix A: Control Subfields.
$8 - Field link and sequence number
See description of this subfield in Appendix A: Control Subfields.

INPUT CONVENTIONS

ISSN Structure - ISSN is an agency-assigned data element. ISSNs are assigned to continuing resource publications by national centers under the auspices of the ISSN Network. An ISSN consists of eight digits comprising two groups of four digits each, separated by a hyphen. The eighth digit is a check digit used as a computer validity check; it consists of a number between 0 and 9 or an uppercase X (for the arabic numeral 10). A description of the ISSN structure and the procedure for validation of the ISSN by calculating the check digit is in International Standard Serial Numbering (ISSN) (ISO 3297).
Punctuation - Field 022 does not end with a period.
Display Constants
ISSN[associated with the content of subfield $a]
ISSN-L[associated with the content of subfield $l]
ISSN-L (canceled)[associated with the content of subfield $m]
ISSN (incorrect)[associated with the content of subfield $y]
ISSN (canceled)[associated with the content of subfield $z]
ISSN usually appears on an item with the prefix ISSN and as two groups of four digits separated by a hyphen. The hyphen separating the two groups of digits is carried in the MARC record. The initialisms ISSN and ISSN-L and the phrases ISSN-L (canceled)ISSN (incorrect) and ISSN (canceled) are not input. They may be system generated as display constants associated with the content of subfields $a, $l, $m, $y, and $z, respectively.
Content designated field:
0220#$a0018-5817$y0018-5811
Display example: 
ISSN 0018-5817 ISSN (incorrect) 0018-5811





NOTE
  • This article is a Stub. It will be expanded to achieve the level of a proper encyclopedia article. 

REFERENCES
  1. Library of Congress. https://www.loc.gov/marc/bibliographic/bd022.html (accessed October 12, 2017)

SEE ALSO

AUTHOR

HISTORY
  • Written: 2017-10-14

PERMALINK

FEEDBACK
  • Help us improve this article! Contact us with your feedback. 

Thanks all for your love, suggestions, testimonials, likes, +1, tweets, and shares ...

650 - Subject Added Entry-Topical Term (R)

MARC 21


First IndicatorSecond Indicator
Level of subject
# - No information provided
0 - No level specified
1 - Primary
2 - Secondary
Thesaurus
0 - Library of Congress Subject Headings
1 - LC subject headings for children's literature
2 - Medical Subject Headings
3 - National Agricultural Library subject authority file
4 - Source not specified
5 - Canadian Subject Headings
6 - Répertoire de vedettes-matière
7 - Source specified in subfield $2

Subfield Codes
Main term portion
  • $a - Topical term or geographic name entry element (NR)
  • $b - Topical term following geographic name entry element (NR)
  • $c - Location of event (NR)
  • $d - Active dates (NR)
  • $e - Relator term (R)
  • $g - Miscellaneous information (R)
  • $4 - Relationship (R)

Subject subdivision portion
  • $v - Form subdivision (R)
  • $x - General subdivision (R)
  • $y - Chronological subdivision (R)
  • $z - Geographic subdivision (R)
Control subfields
  • $0 - Authority record control number or standard number (R)
  • $2 - Source of heading or term (NR)
  • $3 - Materials specified (NR)
  • $6 - Linkage (NR)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Subject added entry in which the entry element is a topical term.
Topical subject added entries may consist of general subject terms including names of events or objects. Subject added entries are assigned to a bibliographic record to provide access according to generally accepted thesaurus-building rules (e.g., Library of Congress Subject Headings (LCSH), Medical Subject Headings (MeSH)). Field 650 may be used by any institution assigning subject headings based on the lists and authority files identified in the second indicator position or in subfield $2 (Source of heading or term).
A title (e.g., Bible and atheism), a geographic name (e.g., Iran in the Koran), or the name of a corporate body (e.g., Catholic Church and humanism) used in a phrase subject heading are also recorded in field 650.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

 INDICATORS

First Indicator - Level of subject
Used to distinguish primary and secondary descriptors.
# - No information provided
0 - No level specified
Level of the subject term could be determined but is not specified.
65000$aFlour industry$vPeriodicals.
1 - Primary
Main focus or subject content of the material.
65017$aCareer Exploration.$2ericd
650#7$aCareer Exploration.$2ericd
65017$aCooks.$2ericd
2 - Secondary
Less important aspect of the content of the material.
65027$aFood Service.$2ericd
65027$aJunior High Schools.$2ericd
65027$aSimulation.$2ericd
[Primary and secondary subject content identified.]
Second Indicator - Thesaurus
Subject heading system or thesaurus used in constructing the subject heading.
0 - Library of Congress Subject Headings
Subject added entry conforms to and is appropriate for use in the Library of Congress Subject Headings (LCSH) and the Name authority files that are maintained by the Library of Congress.
1 - LC subject headings for children's literature
Subject added entry conforms to the "AC Subject Headings" section of the Library of Congress Subject Headings and is appropriate for use in the LC Annotated Card Program.
2 - Medical Subject Headings
Subject added entry conforms to and is appropriate for use in the National Library of Medicine authority files.
3 - National Agricultural Library subject authority file
Subject added entry conforms to and is appropriate for use in the National Agricultural Library subject authority file.
4 - Source not specified
Subject added entry conforms to a controlled list that cannot be identified by second indicator values 0-3, 5-6 or by a code in subfield $2. Field 653 (Index Term-Uncontrolled) is used to record terms that are not derived from controlled subject heading lists.
5 - Canadian Subject Headings
Subject added entry conforms to and is appropriate for use in the Canadian Subject Headings that is maintained by the Library and Archives Canada.
6 - Répertoire de vedettes-matière
Subject added entry conforms to the Répertoire de vedettes-matière that is maintained by the Bibliothèque de l'Université Laval.
7 - Source specified in subfield $2
Subject added entry conforms to a set of subject heading system/thesaurus building rules. The identifying code is given in subfield $2.

 SUBFIELD CODES

$a - Topical term or geographic name entry element
Topical subject or a geographic name used as an entry element for a topical term. Parenthetical qualifying information associated with the term is not separately subfield coded.
650#0$aAmish.
650#0$aKalmyk cattle.
650#0$aAstronauts.
650#0$aEgypt in the Bible.
650#0$aBASIC (Computer program language)
650#0$aBull Run, 2d Battle, 1862.
650#0$aConcertos (String orchestra)
650#0$aVocal music$zFrance$y18th century.
650#0$aDentistry$vJuvenile films.
650#5$aCanadian wit and humor (English)
$b - Topical term following geographic name entry element
Topical term that is entered under a geographic name contained in subfield $a. This construction is not used in AACR2 formulated records.
650#0$aCaracas.$bBolivar Statue.
$c - Location of event
$d - Active dates
Time period during which an event occurred.
$e - Relator term
Specifies the relationship between the topical heading and the described materials, e.g., depicted.
650#0$aSeabiscuit (Race horse),$edepicted.
[Photograph of Seabiscuit, the race horse.]
650#0$aUnicorns,$edepicted.
[Bayeux Tapestry, showing a unicorn.]
$g - Miscellaneous information
Data element that is not more appropriately contained in another defined subfield.
$v - Form subdivision
Form subdivision that designates a specific kind or genre of material as defined by the thesaurus being used. Subfield $v is appropriate only when a form subject subdivision is added to a main term.
650#0$aScuba diving$vPeriodicals.
650#0$aVomiting$xTreatment$vHandbooks, manuals, etc.
$x - General subdivision
Subject subdivision that is not more appropriately contained in subfields $v (Form subdivision), $y (Chronological subdivision), or $z (Geographic subdivision). Subfield $x is appropriate only when a general topical subdivision is added to a main term.
650#0$aRacetracks (Horse-racing)$zUnited States$xHistory.
650#0$aNumismatics$xCollectors and collecting.
$y - Chronological subdivision
Subject subdivision that represents a period of time. Subfield $y is appropriate only when a chronological subject subdivision is added to a main term.
650#0$aMusic$y500-1400.
$z - Geographic subdivision
Geographic subject subdivision. Subfield $z is appropriate in field 650 only when a geographic subject subdivision is added to a main term.
650#0$aWorld War, 1939-1945$xCampaigns$zTunisia.
650#0$aReal property$zMississippi$zTippah County$vMaps.
$0 - Authority record control number or standard number
See description of this subfield in Appendix A: Control Subfields.
$2 - Source of heading or term
MARC code that identifies the source list from which the subject added entry was assigned. It is used only when the second indicator position contains value 7 (Source specified in subfield $2). Code from: Subject Heading and Term Source Codes.
650#7$aEducational buildings$zWashington (D.C.)$y1890-1910.$2lctgm
65017$aAcoustic measurement.$2test
$3 - Materials specified
Part of the described materials to which the field applies.
$4 - Relationship
Code or URI that specifies the relationship from the entity described in the record to the entity referenced in the field. A source of relationship codes is: MARC Code List for Relators.
$6 - Linkage
See description of this subfield in Appendix A: Control Subfields.
$8 - Field link and sequence number
See description of this subfield in Appendix A: Control Subfields.

INPUT CONVENTIONS

Ambiguous Headings - See Appendix E.
Punctuation - Field 650 ends with a mark of punctuation or a closing parenthesis. If the final subfields are subfield $2 or $3, the mark of punctuation precedes those subfields.
65017$aCareer Exploration.$2ericd
650#0$aBallads, English$zHudson River Valley (N.Y. and N.J.)
Main term portion followed by a subject subdivision does not end with a mark of punctuation unless the main term portion ends with an abbreviation, initial/letter, or open date.
650#0$aRain and rainfall$zWashington (State)$zSeattle$vMaps.
Spacing - No spaces are used in initialisms, acronyms, or abbreviations.
650#0$aMARC formats.
650#0$aC.O.D. shipments.
Display Constant
-[dash associated with the content of subfield $v, $x, $y, or $z]
Dash ( - ) that precedes a subject subdivision in an extended subject heading is not carried in the machine-readable record. It may be system generated as a display constant associated with the content of subfield $v, $x, $y, and $z.
 
Content designated field :
650#0$aNuclear energy$xHistory.
Display example:
Nuclear energy-History.
Initial Article - Initial articles (e.g., The) occurring at the beginning of topical subject added entry fields are usually omitted in most languages (except when the intent is to file on the article).
Any diacritics and/or special characters occurring at the beginning of fields are retained. Note that such characters are usually ignored for purposes of sorting and filing.

CONTENT DESIGNATOR HISTORY

$b - Topical term following geographic name as entry element [OBSOLETE, 1981]
Subfield was restored for use in retrospective record conversion in 1987.
$g - Miscellaneous information [NEW, 2014]
$4 - Relator code [NEW, 2005]
$4 - Relator code [RENAMED, 2017] [REDESCRIBED, 2017]
Subfield $4 was renamed and redescribed to allow for the recording of relationship URIs in addition to MARC and non-MARC codes.



NOTE
  • This article is a Stub. It will be expanded to achieve the level of a proper encyclopedia article. 

REFERENCES
  1. Library of Congress. https://www.loc.gov/marc/bibliographic/bd650.html (accessed December 8, 2015)

SEE ALSO

AUTHOR

HISTORY
  • Written: 2015-10-14

PERMALINK

FEEDBACK
  • Help us improve this article! Contact us with your feedback. 

Thanks all for your love, suggestions, testimonials, likes, +1, tweets, and shares ...

050 - Library of Congress Call Number (R)

MARC 21


First IndicatorSecond Indicator
Existence in LC collection
# - No information provided
0 - Item is in LC
1 - Item is not in LC
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)
  • $0 - Authority record control number or standard number (R)
  • $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.
050#4$aNB933.F44$bT6
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.
05000$aZ695.7$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.
05010$aBJ1533.C4$bL49
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.
05000$aJK609$b.M2
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 $a as the alternate class number; it is not separately subfielded.
05000$aQC861.2$b.B36
05000$aZ695.7$b.B37 1980
05000$aZ7164.N3$bL34 no. 9$aZ7165.R42$aHC517.R42
05000$aRC951
$b - Item number
Item number portion of the call number. An item number is the Cutter, date, term, etc. that is added to a classification number to distinguish an item from any other item assigned the same classification number.
Organizations that use the Cutter-Sanborn Three-Figure Author Table may conform to Library of Congress item number practice by applying Subject Cataloging Manual: Shelflisting conventions.
05000$aJX1974.7$b.M5
05000$aZ673.L7$bY
05010$aHF5726$b.B27 1980
05000$aE506.5 6th$bG
05000$aE514.6 10th$b.T76 1905
[The above two call numbers are call numbers for regimental histories.]
$0 - Authority record control number or standard number
See description of this subfield in Appendix A: Control Subfields.
$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.
$6 - Linkage
See description of this subfield in Appendix A: Control Subfields.
$8 - Field link and sequence number
See description of this subfield in Appendix A: Control Subfields.

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 $b is used.
05000$aQA37
05000$aE525.5 123d
General rule is that the item number part of the call number begins at the last capital letter in the call number or the period, if present, preceding it.
05000$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 $b.
05000$aE457.92$b1967
If the call number is followed by volume numbering that includes uppercase letters, these letters are ignored in locating the last capital letter.
05000$aJX1977$b.A2 St/ESA/35
05000$aHA1501$bA, Nr. 615
05000$aHD28$b.Y555 vol. 55 Suppl.
If the call number begins with CS71, subfield $b contains the date.
05000$aCS71.C323$b1977
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 $b contains the date.
05000$aZ696.U5E3$b1958
05000$aZ696.U5H-HJ$b1981
Abbreviations subser. and Suppl. are recorded in subfield $b, even when there is no item number.
Capitalization - Alphabetic characters in the classification number portion of the field are generally uppercase.
Spacing - Any spaces that are desired as part of the call number must be input.
05000$aDK274.3 1968$b.K39
05000$aVM341$b.M9 vol. 48
05000$aCS71.C323$b1977
Display Constant
[ ... ][brackets]
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:
05010$aHF5726$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]
$0 - Authority record control number or standard number [NEW, 2017]



NOTE
  • This article is a Stub. It will be expanded to achieve the level of a proper encyclopedia article. 

REFERENCES
  1. Library of Congress. https://www.loc.gov/marc/bibliographic/bd050.html (accessed October 14, 2015)

SEE ALSO

AUTHOR

HISTORY
  • Written: 2017-10-14

PERMALINK

FEEDBACK
  • Help us improve this article! Contact us with your feedback. 

Thanks all for your love, suggestions, testimonials, likes, +1, tweets, and shares ...