This link has been bookmarked by 150 people . It was first bookmarked on 24 Apr 2008, by Mary Carroll.
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06 Apr 18
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bibliographic information (author, title, call number, etc.) is called a "field
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the same length
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longer physical descriptions
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prevents duplication of work and allows libraries to better share bibliographic resource
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acquire cataloging data
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ommercially available library automation systems to manage library operation
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14 Mar 17
rebeccatobler2Furrie, B. (2009). What is a MARC record, and why is it important?
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01 Aug 16
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MA chine-Readable Cataloging record.
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a computer, can read and interpret the data
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The computer needs a means of interpreting the information found on a cataloging record.
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called a "field."
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hy one standard? You could devise your own method of organizing the bibliographic information, but you would be isolating your library, limiting its options, and creating much more work for yourself.
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Using the MARC standard also enables libraries to make use of commercially available library automation systems to manage library operations.
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FIELDS are marked by TAGS
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Each field is associated with a 3-digit number called a "tag."
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Some fields are further defined by INDICATORS.
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It is the convention to represent a blank, or undefined, indicator position by the character "#".
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14
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1
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"4" so that the first four characters (the "T," the "h," the "e," and the space) will be skipped
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subfield: Most fields contain several related pieces of data
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$a 675 p
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delimiter
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subfield codes are $a for the extent
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CONTENT DESIGNATORS
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Access points:
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"Authority control" means following a recognized or established form.
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"local authority control." Local authority control allows the librarian to look at the list of subject headings or the list of author names and ask to reuse one that has already been entered.
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Many librarians have chosen to maximize limited resources by acquiring cataloging data rather than creating it themselves.
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Once computers became available, it was no longer necessary for librarians everywhere to constantly "reinvent the wheel."
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the contents of the bibliographic records will determine the success of a library's automated operations to a very great extent, for you and your patrons. It is very important to ensure receipt of the highest quality records available.
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07 Jul 16
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30 Jan 16
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1) a description of the item, 2) main entry and added entries, 3) subject headings, and 4) the classification or call number. (MARC records often contain much additional information.)
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1) a description of the item, 2) main entry and added entries, 3) subject headings, and 4) the classification or call number. (MARC records often contain much additional information.)
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Anglo-American Cataloguing Rules
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marks the physical description (often referred to as the "collation" when describing books) -
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Indicators: Two character positions follow each tag (with the exception of Fields 001 through 009). One or both of these character positions may be used for indicators.
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In some fields, only the first or second position is used; in some fields, both are used; and in some fields, like the 020 and 300 fields, neither is used.
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It is the convention to represent a blank, or undefined, indicator position by the character "#".
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Even though two indicators together may look like a 2-digit number, they really are two single-digit numbers.
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first indicator value of 1 in the title field indicates that there should be a separate title entry in the catalog.
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Nonfiling characters: One of the more interesting indicators is the second indicator for the title field. It displays the number of characters at the beginning of the field (including spaces) to be disregarded by the computer in the sorting and filing process. For the title The emperor's new clothes, the second indicator is set to "4" so that the first four characters (the "T," the "h," the "e," and the space) will be skipped and the title will be filed under "emperor's."
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A subfield: Most fields contain several related pieces of data. Each type of data within the field is called a subfield, and each subfield is preceded by a subfield code. Fields 001 through 009 have no subfields.
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A delimiter is a character used to separate subfields.
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The three kinds of content designators -- tags, indicators, and subfield codes -- are the keys to the MARC 21 notation system. In his book, MARC for Library Use (2nd ed. (Boston: G.K. Hall & Co., 1989), p. 5), Walt Crawford calls the MARC system a "shorthand notation" system. The three types of content designators are the shorthand symbols that label and explain the bibliographic record.
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A. Tags divided by hundreds. The basic divisions of the MARC 21 bibliographic record are:
0XX Control information, numbers, codes 1XX Main entry 2XX Titles, edition, imprint (in general, the title, statement of responsibility, edition, and publication information ) 3XX Physical description, etc. 4XX Series statements (as shown in the book) 5XX Notes 6XX Subject added entries 7XX Added entries other than subject or series 8XX Series added entries (other authoritative forms) -
The 9XXs have been left for locally-defined uses, such as local barcode numbers. Local libraries, vendors, or systems can define and use them for attaching other types of information to records. (X9Xs in each of these groups -- 09X, 59X, etc. -- are also reserved for local use, except 490.)
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B. Access points: Access points (a main entry, subject added entries, and other added entries) are an important part of the bibliographic record. These are the headings for which separate cards were created for the traditional card catalog, and which a patron or librarian can search in an online catalog. Most of the access points are in:
1XX fields (main entries) 4XX fields (series statements) 6XX fields (subject headings) 7XX fields (added entries other than subject or series) 8XX fields (series added entries) -
"Authority control" means following a recognized or established form. Usually, a cataloger chooses subject and name headings from a list of approved headings. In a conversation, if you talked about visiting the "Getty Museum" and the "J. Paul Getty Museum" in California, your listener would know you meant the same thing. But if a cataloger sometimes uses "Getty Museum" and other times uses "J. Paul Getty Museum" as headings in a catalog, the library user will have a difficult time finding all the books on that subject. If a cataloger follows the Library of Congress's list of established forms for names, he or she will use the heading "J. Paul Getty Museum." As long as the cataloger always uses one established form, all the books on that museum will be found in one place in the catalog.
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http://authorities.loc.gov
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What is more important on the computer-based library catalog is what is termed "local authority control." Local authority control allows the librarian to look at the list of subject headings or the list of author names and ask to reuse one that has already been entered. In that way, all headings for the same person or same subject will be entered exactly the same way -- which is the point of authority control
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"retrospective conversion" describes a project that converts bibliographic records from their present form -- such as shelflist cards or a brief circulation record -- to full machine-readable bibliographic records.
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X00 Personal names X10 Corporate names X11 Meeting names X30 Uniform titles X40 Bibliographic titles X50 Topical terms X51 Geographic names -
if the subject of the book is a topic (Railroads), the tag will be 650
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A. Leader: The leader is the first 24 characters of the record.
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B. Directory: MARC records are called "tagged" records.
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immediately following the leader is a block of data called a directory. This directory tells what tags are in the record and where they are placed (by a count of the characters to the position where each field begins).
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C. The 008 field: The 008 field is referred to as Fixed-Length Data Elements, or Fixed Field Codes. Its 40 characters contain important information, but in an abbreviated form.
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The details required for interpreting the 008 field for books are in Part X.
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Cataloging in Publication (CIP) data found on the verso of the title page of many books.
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After the MARC record was developed, libraries shared in the benefits of machine-readable cataloging whether they had an online system or not. The cards, purchased from the Library of Congress or from a jobber, were computer-printed from bibliographic records based on Library of Congress MARC files.
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010 tag marks the Library of Congress Control Number (LCCN) 020 tag marks the International Standard Book Number (ISBN) 100 tag marks a personal name main entry (author) 245 tag marks the title information (which includes the title, other title information, and the statement of responsibility) 250 tag marks the edition 260 tag marks the publication information 300 tag marks the physical description (often referred to as the "collation" when describing books) 490 tag marks the series statement 520 tag marks the annotation or summary note 650 tag marks a topical subject heading 700 tag marks a personal name added entry (joint author, editor, or illustrator)
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1) a description of the item, 2) main entry and added entries, 3) subject headings, and 4) the classification or call number. (MARC records often contain much additional information.)
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includes the title, statement of responsibility, edition, material specific details, publication information, physical description, series, notes, and standard numbers.
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title main entry" item (no author)
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ears List of Subject Headings (Sears), the Library of Congress Subject Headings (LCSH), or some other list
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means of interpreting the information found on a cataloging record.
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each MARC record contains a little "table of contents" to the record
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Using the MARC standard prevents duplication of work and allows libraries to better share bibliographic resources
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more efficient use of computer storage space.
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under Format Integration, one group of tags is used for records of all types of materials rather than having a tag set defined for each type.
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may show the tag immediately followed by indicators (making it appear to be a 4- or 5-digit number), the tag is always the first 3 digits.
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Two character positions follow each tag (with the exception of Fields 001 through 009)
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When an indicator position is not used, that indicator is referred to as "undefined" and the position is left blank.
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represent a blank, or undefined, indicator position by the character "#"
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letters are uncommon
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they really are two single-digit numbers.
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A first indicator value of 1 in the title field indicates that there should be a separate title entry in the catalog.
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A first indicator value of 0 would mean that a title main entry is involved;
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the second indicator is set to "4" so that the first four characters (the "T," the "h," the "e," and the space) will be skipped and the title will be filed under "emperor's."
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Fields 001 through 009 have no subfields
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Subfield codes are one lowercase letter (occasionally a number) preceded by a delimiter.
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9XXs have been left for locally-defined uses, such as local barcode numbers
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X9Xs in each of these groups -- 09X, 59X, etc. -- are also reserved for local use, except 490.
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Local authority control allows the librarian to look at the list of subject headings or the list of author names and ask to reuse one that has already been entered.
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"Format Integration" means that the same "signposts" are used to mark data in records for all types of publications, rather than having different sets of "signposts" for each type. More technically, under Format Integration, one group of tags is used for records of all types of materials rather than having a tag set defined for each type.
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Each bibliographic record is divided logically into fields.
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These fields are subdivided into one or more "subfields."
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represented by 3-digit tags.
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Each field is associated with a 3-digit number called a "tag." A tag identifies the field -- the kind of data -- that follows.
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The Cataloging Distribution Service of the Library of Congress distributes a detailed listing of all tags in both the 2-volume publication MARC 21 Format for Bibliographic Data and a summarized single volume work entitled MARC 21 Concise Formats
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In the MARC record, 10% of the tags are used over and over, and the other 90% are seen only occasionally or rarely.
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Two character positions follow each tag (with the exception of Fields 001 through 009).
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In the example which follows, the first 3 digits are the tag (245 defines this as a title field) and the next 2 digits (a 1 and a 4) are indicator values. The 1 is the first indicator; 4 is the second indicator.
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A first indicator value of 1 in the title field indicates that there should be a separate title entry in the catalog.
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It displays the number of characters at the beginning of the field (including spaces) to be disregarded by the computer in the sorting and filing process.
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Most fields contain several related pieces of data. Each type of data within the field is called a subfield, and each subfield is preceded by a subfield code. Fields 001 through 009 have no subfields.
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Subfield codes are one lowercase letter (occasionally a number) preceded by a delimiter.
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Different software programs use different characters to represent the delimiter on the screen or on printouts. Examples are a double dagger (
), an "at sign" (@), a dollar sign ($), an underline ( _ ), or the graphic symbol "
". -
The three kinds of content designators -- tags, indicators, and subfield codes -- are the keys to the MARC 21 notation system.
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Walt Crawford calls the MARC system a "shorthand notation" system.
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There are some general rules that help define what all the numbers used as field tags mean.
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Please note that in discussions of MARC 21 tags, the notation XX is often used to refer to a group of related tags. For example, 1XX refers to all the tags in the 100s: 100, 110, 130, and so on.
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The basic divisions of the MARC 21 bibliographic record are:
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The 9XXs have been left for locally-defined uses, such as local barcode numbers.
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These are the headings for which separate cards were created for the traditional card catalog, and which a patron or librarian can search in an online catalog. Most of the access points are in:
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"Authority control" means following a recognized or established form.
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Usually, a cataloger chooses subject and name headings from a list of approved headings.
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For names, the best authority is the Library of Congress Name Authority file.
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This file is available in machine-readable format from the Cataloging Distribution Service (CDS) of the Library of Congress or online at http://authorities.loc.gov.
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For topics or geographic names, the common subject authority lists are the Library of Congress Subject Headings or the Sears List of Subject Headings.
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What is more important on the computer-based library catalog is what is termed "local authority control." Local authority control allows the librarian to look at the list of subject headings or the list of author names and ask to reuse one that has already been entered.
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The term "retrospective conversion" describes a project that converts bibliographic records from their present form -- such as shelflist cards or a brief circulation record -- to full machine-readable bibliographic records.
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The 008 field is referred to as Fixed-Length Data Elements, or Fixed Field Codes. Its 40 characters contain important information, but in an abbreviated form.
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Once computers became available, it was no longer necessary for librarians everywhere to constantly "reinvent the wheel."
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14 Feb 14
Leslie RainsWHAT IS A MARC RECORD,
AND WHY IS IT IMPORTANT?
Part I: What Does MARC Mean?
Part II: Why Is a MARC Record Necessary?
Part III: MARC Terms and Their Definitions
Part IV: Where do MARC Records Originate?
Part V: MARC Data Issues
Part VI: In Conclusion
It is impossible these days to read a library journal, attend a library conference, or even have an informal chat with other librarians without hearing the phrases "MARC format," "MARC records," or "MARC-compatible." Many library professionals have not had an opportunity to take formal courses explaining the important topics of library automation and the role of MARC, yet automated library systems may be important parts of their libraries.
This booklet will explain -- in the simplest terms possible -- what a MARC record is, and it will provide the basic information needed to understand and evaluate a MARC record. -
04 Feb 14
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MA chine-Readable Cataloging record
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can read and interpret the data in the cataloging record
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bibliographic record, or the information traditionally shown on a catalog card. The record includes (not necessarily in this order): 1) a description of the item, 2) main entry and added entries, 3) subject headings, and 4) the classification or call number
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Anglo-American Cataloguing Rules, 2nd ed
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paragraph sections of a card
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title, statement of responsibility, edition, material specific details, publication information, physical description, series, notes, and standard numbers.
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Access points are the retrieval points in the library catalog where patrons should be able to look up the item
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For this book, should there be entries in the catalog for more than one author or more than one title? Should the title of the series be noted? How should the author's name be written? Is this a "title main entry" item (no author)?
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Use of an approved list is important for consistency, to ensure that all items on a particular subject are found under the same heading and therefore in the same place in the catalog.
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The patron does not have to imagine all the possible synonyms for the word he is looking for.
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The purpose of the call number is to place items on the same subject together on the same shelf in the library
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he MARC record contains a guide to its data, or little "signposts," before each piece of bibliographic information.
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The place provided for each of these pieces of bibliographic information (author, title, call number, etc.) is called a "field."
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each MARC record contains a little "table of contents"
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Data "signposts:" The computer must have assistance if it is to read and interpret the bibliographic record.
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Using the MARC standard prevents duplication of work and allows libraries to better share bibliographic resources.
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A comparison of the same record with textual information and with MARC tags illustrates the compactness of the MARC 21 format.
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The MARC 21 format uses "260" "$a" "$b" and "$c" to mark the field that holds imprint data instead of storing the words "publication area," "place of publication," "name of publisher," and "date of publication" in each record. This convention makes more efficient use of computer storage space
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The emphasis will be on those areas commonly used in cataloging for schools
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under Format Integration, one group of tags is used for records of all types of materials rather than having a tag set defined for each type.
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The proper names of these "signposts" are field, tag, indicator, subfield, subfield code, and content designator
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Each bibliographic record is divided logically into fields
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fields are subdivided into one or more "subfields."
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they are represented by 3-digit tags
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Each field is associated with a 3-digit number called a "tag
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The tags used most frequently are:
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10% of the tags are used over and over, and the other 90% are seen only occasionally or rarely
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Librarians who work with MARC records soon memorize the numbers for the fields common to the materials they catalog
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Two character positions follow each tag (with the exception of Fields 001 through 009). One or both of these character positions may be used for indicators.
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It is the convention to represent a blank, or undefined, indicator position by the character "#"
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Even though two indicators together may look like a 2-digit number, they really are two single-digit numbers
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first 3 digits are the tag (245 defines this as a title field) and the next 2 digits (a 1 and a 4) are indicator values
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A first indicator value of 1 in the title field indicates that there should be a separate title entry in the catalog.
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One of the more interesting indicators is the second indicator for the title field. It displays the number of characters at the beginning of the field (including spaces) to be disregarded by the computer in the sorting and filing process. For the title The emperor's new clothes, the second indicator is set to "4" so that the first four characters (the "T," the "h," the "e," and the space) will be skipped and the title will be filed under "emperor's.
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Each type of data within the field is called a subfield, and each subfield is preceded by a subfield code.
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delimiter is a character used to separate subfields
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In the example above, the subfield codes are $a for the extent, $b for other physical details, and $c for dimensions
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three kinds of content designators -- tags, indicators, and subfield codes -- are the keys to the MARC 21 notation system
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The three types of content designators are the shorthand symbols that label and explain the bibliographic record
-
The 9XXs have been left for locally-defined uses, such as local barcode numbers. Local libraries, vendors, or systems can define and use them for attaching other types of information to records.
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headings for which separate cards were created for the traditional card catalog, and which a patron or librarian can search in an online catalog
-
As long as the cataloger always uses one established form, all the books on that museum will be found in one place in the catalog.
-
Local authority control allows the librarian to look at the list of subject headings or the list of author names and ask to reuse one that has already been entered. In that way, all headings for the same person or same subject will be entered exactly the same way -- which is the point of authority control.
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"retrospective conversion" describes a project that converts bibliographic records from their present form -- such as shelflist cards or a brief circulation record -- to full machine-readable bibliographic records
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The fields requiring authority control are also the fields that use parallel tag construction
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Therefore, for a main entry (1XX) that is a personal name (X00), the correct tag is 100
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X00 Personal names X10 Corporate names X11 Meeting names X30 Uniform titles X40 Bibliographic titles X50 Topical terms X51 Geographic names -
The leader is the first 24 characters of the record
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MARC records are called "tagged" records
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The 008 field is referred to as Fixed-Length Data Elements, or Fixed Field Codes
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can be used to identify and retrieve records matching specific criteria.
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For example, there is a code in this field to indicate whether a book is large-print, a code to identify the country of publication, a code to identify juvenile materials, a code to indicate the language of the text, and so on
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Colleges and universities with large library budgets joined bibliographic utilities such as OCLC, WLN, RLIN, and A-G Canada.
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powerful, inexpensive computers are available for the management of library operations in all types and sizes of libraries.
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Although the MARC format was originally developed by the Library of Congress and the MARC 21 format documentation is maintained and published there, the Library does not make changes or revisions unilaterally.
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The Machine-Readable Bibliographic Information (MARBI) Committee is a committee of the American Library Association (ALA) and is composed of three representatives from each of the three function-oriented divisions of ALA: ALCTS (technical services function); LITA (automation); and RUSA (reference).
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MARBI meets in conjunction with the MARC Advisory Committee at each ALA conference (annual and mid-winter). The major activity of the Committee is the review of discussion papers and proposals submitted by or through the Library of Congress for changes or additions to existing MARC formats, or the development of new MARC format support in emerging area
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Library automation systems vendors should be able to design their systems to correctly receive and process standard MARC records. Individual librarians using computers to manage their libraries are the direct beneficiaries of all this MARC 21 standards work.
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MARC Data Issues
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What is the quality of the MARC data? Which MARC 21 fields are present? Is the data based on Library of Congress MARC records? If so, is the full information that is available on those files evident in the records? Is anything added to the record?
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the contents of the bibliographic records will determine the success of a library's automated operations to a very great extent, for you and your patrons.
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Does the library automation system being evaluated make full use of the cataloging information? Does it retain all the data and the MARC 21 content designators?
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The MARC format is an industry-wide standard. As additional programs become available, a library's ability to participate in them could hinge on the quality of its bibliographic records
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You've learned to d efine and identify the three types of MARC content designators: tags, subfield codes, and indicators.
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As you become more familiar with MARC, the simpler it will become.
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Cataloging record" means a bibliographic record, or the information traditionally shown on a catalog card. The record includes (not necessarily in this order): 1) a description of the item, 2) main entry and added entries, 3) subject headings, and 4) the classification or call number. (MARC records often contain much additional information.)
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Call number
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The purpose of the call number is to place items on the same subject together on the same shelf in the library.
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21 Jan 14
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26 Oct 13
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A delimiter: Different software programs use different characters to represent the delimiter on the screen or on printouts. Examples are a double dagger (
), an "at sign" (@), a dollar sign ($), an underline ( _ ), or the graphic symbol "
". In this publication the dollar sign ($) is used as the delimiter portion of the subfield code.In the example above, the subfield codes are $a for the extent, $b for other physical details, and $c for dimensions.
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There are some general rules that help define what all the numbers used as field tags mean. Please note that in discussions of MARC 21 tags, the notation XX is often used to refer to a group of related tags. For example, 1XX refers to all the tags in the 100s: 100, 110, 130, and so on.
<!-- Lengthy blockquote section of section 5 in Part III -->A. Tags divided by hundreds. The basic divisions of the MARC 21 bibliographic record are:
0XX Control information, numbers, codes 1XX Main entry 2XX Titles, edition, imprint (in general, the title, statement of responsibility, edition, and publication information ) 3XX Physical description, etc. 4XX Series statements (as shown in the book) 5XX Notes 6XX Subject added entries 7XX Added entries other than subject or series 8XX Series added entries (other authoritative forms) The 9XXs have been left for locally-defined uses, such as local barcode numbers. Local libraries, vendors, or systems can define and use them for attaching other types of information to records. (X9Xs in each of these groups -- 09X, 59X, etc. -- are also reserved for local use, except 490.)
The list of the most common tags shows how each fits into one of these divisions: 100 is an author main entry, 520 is a summary note, and so on.
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Preceding the main bibliographic record parts -- which are known to all librarians because of their presence on catalog cards -- the MARC record contains some less familiar information. Automated cataloging systems usually provide default data or prompts to help a cataloger input this information.
A. Leader: The leader is the first 24 characters of the record. Each position has an assigned meaning, but much of the information in the leader is for computer use. MARC record creation and editing programs usually provide a window or prompts to assist the cataloger in filling in any leader data elements that require input. The details required for interpreting the leader are in Part IX of this brochure.
B. Directory: MARC records are called "tagged" records. Before it becomes a tagged record, a MARC record (in what is called the MARC communications format), looks very different -- like one long run-on sentence. In the communications format, the fields are not preceded by tags. However, immediately following the leader is a block of data called a directory. This directory tells what tags are in the record and where they are placed (by a count of the characters to the position where each field begins). The directory is constructed (by computer) from the bibliographic record, based on the cataloging information, and, if any of the cataloging information is altered, can be reconstructed in the same way. Part XI displays a record in MARC 21 communications format, including its directory.
C. The 008 field: The 008 field is referred to as Fixed-Length Data Elements, or Fixed Field Codes. Its 40 characters contain important information, but in an abbreviated form. Although it is not yet used to its fullest in online catalog systems, this field can be used to identify and retrieve records matching specific criteria.
For example, there is a code in this field to indicate whether a book is large-print, a code to identify the country of publication, a code to identify juvenile materials, a code to indicate the language of the text, and so on. The details required for interpreting the 008 field for books are in Part X.
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24 Jul 13
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22 Jun 13
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13 Apr 13
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what librarians using a library automation system will see and need to understand on their computer screens when adding, editing, or examining records.
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Each bibliographic record is divided logically into fields
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3. SUBFIELDS are marked by SUBFIELD CODES and DELIMITERS.
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A delimiter: Different software programs use different characters to represent the delimiter on the screen or on printouts. Examples are a double dagger (
), an "at sign" (@), a dollar sign ($), an underline ( _ ), or the graphic symbol "
". In this publication the dollar sign ($) is used as the delimiter portion of the subfield code.In the example above, the subfield codes are $a for the extent, $b for other physical details, and $c for dimensions.
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06 Mar 13
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02 Mar 13
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15 Feb 13
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1XX Main entry -
2XX Titles, edition, imprint (in general, the title, statement of responsibility, edition, and publication information ) -
3XX Physical description, etc.
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05 Feb 13
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23 Aug 12
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03 Jun 12
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12 Mar 12
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11 Mar 12
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05 Mar 12
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11 Feb 12
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What Does MARC Mean?
What is a MARC record? A MARC record is a MA chine-Readable Cataloging record.
And what is a machine-readable cataloging record?
Machine-readable: "Machine-readable" means that one particular type of machine, a computer, can read and interpret the data in the cataloging record.
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Cataloging record" means a bibliographic record,
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Description
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Main entry and added entries
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Access points are the retrieval points in the library catalog where patrons should be able to look up the item
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For this book, should there be entries in the catalog for more than one author or more than one title?
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Should the title of the series be noted? How should the author's name be written? Is this a "title main entry" item (no author)?
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The librarian uses the Sears List of Subject Headings (Sears), the Library of Congress Subject Headings
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Subject headings (subject added entries)
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Use of an approved list is important for consistency
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MARC enables libraries to acquire cataloging data that is predictable and reliable.
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A tag: Each field is associated with a 3-digit number called a "tag." A tag identifies the field -- the kind of data -- that follows. Even though a printout or screen display may show the tag immediately followed by indicators (making it appear to be a 4- or 5-digit number), the tag is always the first 3 digits.
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Indicators: Two character positions follow each tag
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A subfield code: Subfield codes are one lowercase letter (occasionally a number) preceded by a delimiter. A delimiter is a character used to separate subfields. Each subfield code indicates what type of data follows it.
-
A delimiter: Different software programs use different characters to represent the delimiter on the screen or on printouts. Examples are a double dagger (
), an "at sign" (@), a dollar sign ($), an underline ( _ ), or the graphic symbol "
". In this publication the dollar sign ($) is used as the delimiter portion of the subfield code.In the example above, the subfield codes are $a for the extent, $b for other physical details, and $c for dimensions.
-
"Authority control" means following a recognized or established form. Usually, a cataloger chooses subject and name headings from a list of approved headings.
-
If a cataloger follows the Library of Congress's list of established forms for names, he or she will use the heading "J. Paul Getty Museum."
-
all the books on that museum will be found in one place in the catalog.
-
Library of Congress Name Authority file.
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06 Feb 12
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MA chine-Readable Cataloging record.
-
"Machine-readable"
-
one particular type of machine, a computer, can read and interpret the data in the cataloging record
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Cataloging record" means a bibliographic record
-
follow the rules in Anglo-American Cataloguing Rules, 2nd ed., 2002 revision to compose the bibliographic description of a library item.
-
ncludes the title, statement of responsibility, edition, material specific details, publication information, physical description, series, notes, and standard numbers
-
Sears List of Subject Headings (Sears), the Library of Congress Subject Headings
-
Subject headings
-
for consistency
-
purpose of the call number is to place items on the same subject together on the same shelf in the library
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The place provided for each of these pieces of bibliographic information (author, title, call number, etc.) is called a "field."
-
to allow proper cataloging of books and other library items, the best file structure allows for records with an unlimited number of fields and unlimited field lengths
-
necessary because not all titles are the same length
-
computer must have assistance if it is to read and interpret the bibliographic record
-
Data "signposts:"
-
Using the MARC standard prevents duplication of work and allows libraries to better share bibliographic resources
-
The MARC 21 format
-
more efficient use of computer storage space.
-
"Format Integration" means that the same "signposts" are used to mark data in records for all types of publications, rather than having different sets of "signposts" for each type. More technically, under Format Integration, one group of tags is used for records of all types of materials rather than having a tag set defined for each type.
-
A tag
-
3-digit number
-
identifies the field -- the kind of data -- that follows
-
Subfield codes are one lowercase letter (occasionally a number) preceded by a delimiter. A delimiter is a character used to separate subfields. Each subfield code indicates what type of data follows it. (For each field in the MARC 21 bibliographic format, the MARC 21 documentation lists and describes the valid subfield codes.)
-
"retrospective conversion" describes a project that converts bibliographic records from their present form
-
to full machine-readable bibliographic records
-
Usually the retrospective conversion is done by "matching" a library's old records (whether on cards or in a non-MARC format) to a database of full records in machine readable form
-
-
04 Feb 12
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Use of an approved list is important for consistency, to ensure that all items on a particular subject are found under the same heading and therefore in the same place in the catalog.
-
The box chart in the previous section <!-- on page 4 --> showed a MARC record labelled with "signposts." The proper names of these "signposts" are field, tag, indicator, subfield, subfield code, and content designator.
-
010 tag marks the Library of Congress Control Number (LCCN) 020 tag marks the International Standard Book Number (ISBN) 100 tag marks a personal name main entry (author) 245 tag marks the title information (which includes the title, other title information, and the statement of responsibility) 250 tag marks the edition 260 tag marks the publication information 300 tag marks the physical description (often referred to as the "collation" when describing books) 490 tag marks the series statement 520 tag marks the annotation or summary note 650 tag marks a topical subject heading 700 tag marks a personal name added entry (joint author, editor, or illustrator) -
Indicators:
-
When an indicator position is not used, that indicator is referred to as "undefined" and the position is left blank. It is the convention to represent a blank, or undefined, indicator position by the character "#".
-
One of the more interesting indicators is the second indicator for the title field. It displays the number of characters at the beginning of the field (including spaces) to be disregarded by the computer in the sorting and filing process.
-
A subfield:
-
Subfield codes are one lowercase letter (occasionally a number) preceded by a delimiter
-
( _ )
-
CONTENT DESIGNATORS
-
Please note that in discussions of MARC 21 tags, the notation XX is often used to refer to a group of related tags. For example, 1XX refers to all the tags in the 100s: 100, 110, 130, and so on.
-
0XX Control information, numbers, codes 1XX Main entry 2XX Titles, edition, imprint (in general, the title, statement of responsibility, edition, and publication information ) 3XX Physical description, etc. 4XX Series statements (as shown in the book) 5XX Notes 6XX Subject added entries 7XX Added entries other than subject or series 8XX Series added entries (other authoritative forms) -
The 9XXs have been left for locally-defined uses, such as local barcode numbers.
-
X9Xs in each of these groups -- 09X, 59X, etc. -- are also reserved for local use, except 490
-
B. Access points:
-
1XX fields (main entries) 4XX fields (series statements) 6XX fields (subject headings) 7XX fields (added entries other than subject or series) 8XX fields (series added entries) -
"Authority control"
-
As long as the cataloger always uses one established form, all the books on that museum will be found in one place in the catalog.
-
For names, the best authority is the Library of Congress Name Authority file.
-
Library of Congress Subject Headings or the Sears List of Subject Headings.
-
"local authority control."
-
Local authority control allows the librarian to look at the list of subject headings or the list of author names and ask to reuse one that has already been entered. In that way, all headings for the same person or same subject will be entered exactly the same way --
-
C. Parallel content: The fields requiring authority control are also the fields that use parallel tag construction. In general, in the 1XX, 4XX, 6XX, 7XX and 8XX fields, a personal name will have the last two digits 00. Therefore, for a main entry (1XX) that is a personal name (X00), the correct tag is 100. For a subject heading (6XX) that is a personal name, the tag is 600, and so on. This parallel content can be summarized as follows:
-
X00 Personal names X10 Corporate names X11 Meeting names X30 Uniform titles X40 Bibliographic titles X50 Topical terms X51 Geographic names -
The leader is the first 24 characters of the record
-
mmediately following the leader is a block of data called a directory. This directory tells what tags are in the record and where they are placed
-
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09 Jan 12
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17 Oct 11
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22 Sep 11
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06 Aug 11
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02 Aug 11
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15 Jul 11
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A MARC record is a MA chine-Readable Cataloging record.
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delimiter is a character used to separate subfields. Each subfield code indicates what type of data follows it.
-
"Authority control" means following a recognized or established form
-
Local authority control allows the librarian to look at the list of subject headings or the list of author names and ask to reuse one that has already been entered. In that way, all headings for the same person or same subject will be entered exactly the same way -- which is the point of authority control.
-
X00 Personal names X10 Corporate names X11 Meeting names X30 Uniform titles X40 Bibliographic titles X50 Topical terms X51 Geographic names -
By combining this chart with the chart "Tags divided by hundreds" (above), it becomes evident that if the subject of a book (6XX) is a person (Lincoln, Abraham), the tag will be 600; if the subject of the book is a corporation (Apple Computer, Inc.), the tag will be 610; if the subject of the book is a topic (Railroads), the tag will be 650; if the subject of a book is a place (United States), the tag will be 651. An added entry (7XX) for a joint author (a personal name) will have tag 700.
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11 Jul 11
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10 Jul 11
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09 Jul 11
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28 Jun 11
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16 Jun 11
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14 Jun 11
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27 Apr 11
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30 Mar 11
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18 Mar 11
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14 Mar 11
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01 Mar 11
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20 Dec 10
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17 Dec 10
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23 Oct 10
Courtney WalkerMARC record explanation
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22 Sep 10
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10 Sep 10
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03 Aug 10
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28 Jun 10
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MA chine-Readable Cataloging record.
-
a computer, can read and interpret the data in the cataloging record.
-
1) a description of the item, 2) main entry and added entries, 3) subject headings, and 4) the classification or call number.
-
Anglo-American Cataloguing Rules
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Description
-
to compose the bibliographic description
-
rules for determining "access points" to the record
-
Main entry and added entries
-
retrieval points in the library catalog where patrons should be able to look up the item.
-
Subject headings (subject added entries)
-
Use of an approved list is important for consistency, to ensure that all items on a particular subject are found under the same heading and therefore in the same place in the catalog.
-
Call number
-
The purpose of the call number is to place items on the same subject together on the same shelf in the library.
-
place provided for each of these pieces of bibliographic information (author, title, call number, etc.) is called a "field."
-
each MARC record contains a little "table of contents" to the record, according to a predefined standard
-
"signposts
-
rograms can be written to search for and retrieve certain types of information within specific fields, and also to display lists of items meeting the search criteria.
-
isolating your library, limiting its options, and creating much more work for yourself.
-
allows libraries to better share bibliographic resources.
-
acquire cataloging data that is predictable and reliable.
-
LC MARC format, a system of using brief numbers, letters, and symbols within the cataloging record itself to mark different types of information.
-
"subfields
-
Each field is associated with a 3-digit number called a "tag." A tag identifies the field -- the kind of data -- that follows.
-
Two character positions follow each tag
-
When an indicator position is not used, that indicator is referred to as "undefined" and the position is left blank
-
Even though two indicators together may look like a 2-digit number, they really are two single-digit numbers
-
It displays the number of characters at the beginning of the field (including spaces) to be disregarded by the computer in the sorting and filing process.
-
Each type of data within the field is called a subfield
-
subfield code
-
Subfield codes are one lowercase letter (occasionally a number) preceded by a delimiter
-
. A delimiter is a character used to separate subfields
-
content designators -- tags, indicators, and subfield codes -
-
0XX Control information, numbers, codes 1XX Main entry 2XX Titles, edition, imprint (in general, the title, statement of responsibility, edition, and publication information ) 3XX Physical description, etc. 4XX Series statements (as shown in the book) 5XX Notes 6XX Subject added entries 7XX Added entries other than subject or series 8XX Series added entries (other authoritative forms) -
The 9XXs have been left for locally-defined uses, such as local barcode numbers.
-
Access points (a main entry, subject added entries, and other added entries) are an important part of the bibliographic record.
-
ollowing a recognized or established form
-
If a cataloger follows the Library of Congress's list of established forms for names, he or she will use the heading "J. Paul Getty Museum." As long as the cataloger always uses one established form, all the books on that museum will be found in one place in the catalog.
-
"local authority control."
-
Local authority control allows the librarian to look at the list of subject headings or the list of author names and ask to reuse one that has already been entered.
-
"retrospective conversion" describes a project that converts bibliographic records from their present form
-
parallel tag construction
-
X00 Personal names X10 Corporate names X11 Meeting names X30 Uniform titles X40 Bibliographic titles X50 Topical terms X51 Geographic names -
first 24 characters of the record
-
position has an assigned meaning
-
immediately following the leader is a block of data called a directory
-
tells what tags are in the record and where they are placed
-
Fixed-Length Data Elements, or Fixed Field Codes
-
-
23 Jun 10
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10 May 10
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23 Mar 10
-
15 Feb 10
-
27 Jan 10
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"Machine-readable" means that one particular type of machine, a computer, can read and interpret the data in the cataloging record
-
The record includes (not necessarily in this order): 1) a description of the item, 2) main entry and added entries, 3) subject headings, and 4) the classification or call number.
-
Librarians follow the rules in Anglo-American Cataloguing Rules, 2nd ed., 2002 revision to compose the bibliographic description of a library item. This "description" is shown in the paragraph sections of a card. It includes the title, statement of responsibility, edition, material specific details, publication information, physical description, series, notes, and standard numbers.
-
AACR2 also contains rules for determining "access points" to the record (usually referred to as the "main entry" and "other added entries"), and the form these access points should take.
-
Access points are the retrieval points in the library catalog where patrons should be able to look up the item.
-
The librarian uses the Sears List of Subject Headings (Sears), the Library of Congress Subject Headings (LCSH), or some other list of standard subject headings to select the subjects under which the item will be listed. Use of an approved list is important for consistency, to ensure that all items on a particular subject are found under the same heading and therefore in the same place in the catalog.
-
The computer needs a means of interpreting the information found on a cataloging record. The MARC record contains a guide to its data, or little "signposts," before each piece of bibliographic information.
The place provided for each of these pieces of bibliographic information (author, title, call number, etc.) is called a "field."
-
However, to allow proper cataloging of books and other library items, the best file structure allows for records with an unlimited number of fields and unlimited field lengths.
-
If a bibliographic record has been marked correctly and saved in a computer data file, computer programs can then be written to punctuate and format the information correctly for printing a set of catalog cards, or for displaying the information on a computer screen. Programs can be written to search for and retrieve certain types of information within specific fields, and also to display lists of items meeting the search criteria.
-
Using the MARC standard prevents duplication of work and allows libraries to better share bibliographic resources. Choosing to use MARC enables libraries to acquire cataloging data that is predictable and reliable.
-
Using the MARC standard also enables libraries to make use of commercially available library automation systems to manage library operations.
-
The MARC standard also allows libraries to replace one system with another with the assurance that their data will still be compatible.
-
The Library of Congress serves as the official depository of United States publications and is a primary source of cataloging records for US and international publications.
-
The original LC MARC format evolved into MARC 21 and has become the standard used by most library computer programs.
-
Recently approved changes, some of which have already been implemented, to the MARC 21 bibliographic format have involved the concept of Format Integration. "Format Integration" means that the same "signposts" are used to mark data in records for all types of publications, rather than having different sets of "signposts" for each type. More technically, under Format Integration, one group of tags is used for records of all types of materials rather than having a tag set defined for each type.
-
Each bibliographic record is divided logically into fields. There is a field for the author, a field for title information, and so on. These fields are subdivided into one or more "subfields." As previously noted, the textual names of the fields are too lengthy to be reproduced within each MARC record. Instead they are represented by 3-digit tags. (Though online catalogs may display the names of the fields, the names are supplied by the system software, not by the MARC record.)
-
Each field is associated with a 3-digit number called a "tag." A tag identifies the field -- the kind of data -- that follows.
-
Even though a printout or screen display may show the tag immediately followed by indicators (making it appear to be a 4- or 5-digit number), the tag is always the first 3 digits.
-
Two character positions follow each tag (with the exception of Fields 001 through 009). One or both of these character positions may be used for indicators.
-
When an indicator position is not used, that indicator is referred to as "undefined" and the position is left blank. It is the convention to represent a blank, or undefined, indicator position by the character "#".
-
Even though two indicators together may look like a 2-digit number, they really are two single-digit numbers.
-
value of 1 in the title field indicates that there should be a separate title entry in the catalog. In the card catalog environment, this means that a title card should be printed for this item and an entry for "Title" added to the tracings. A first indicator value of 0 would mean that a title main entry is involved; the card would be printed with the traditional hanging indention, and no additional tracing for the title would be required (since it is the main entry).
-
It displays the number of characters at the beginning of the field (including spaces) to be disregarded by the computer in the sorting and filing process.
-
Most fields contain several related pieces of data. Each type of data within the field is called a subfield, and each subfield is preceded by a subfield code.
-
: Subfield codes are one lowercase letter (occasionally a number) preceded by a delimiter. A delimiter is a character used to separate subfields. Each subfield code indicates what type of data follows it.
-
Different software programs use different characters to represent the delimiter on the screen or on printouts. Examples are a double dagger (
), an "at sign" (@), a dollar sign ($), an underline ( _ ), or the graphic symbol -
three kinds of content designators -- tags, indicators, and subfield codes
-
The 9XXs have been left for locally-defined uses, such as local barcode numbers. Local libraries, vendors, or systems can define and use them for attaching other types of information to records. (X9Xs in each of these groups -- 09X, 59X, etc. -- are also reserved for local use, except 490.)
-
Access points (a main entry, subject added entries, and other added entries) are an important part of the bibliographic record. These are the headings for which separate cards were created for the traditional card catalog, and which a patron or librarian can search in an online catalog.
-
These are the fields that are under authority control.
-
means following a recognized or established form. Usually, a cataloger chooses subject and name headings from a list of approved headings.
-
For names, the best authority is the Library of Congress Name Authority file.
-
For topics or geographic names, the common subject authority lists are the Library of Congress Subject Headings or the Sears List of Subject Headings.
-
What is more important on the computer-based library catalog is what is termed "local authority control." Local authority control allows the librarian to look at the list of subject headings or the list of author names and ask to reuse one that has already been entered. In that way, all headings for the same person or same subject will be entered exactly the same way -- which is the point of authority control.
-
The term "retrospective conversion" describes a project that converts bibliographic records from their present form -- such as shelflist cards or a brief circulation record -- to full machine-readable bibliographic records. The term retrospective is used because the project is done for a library's existing collection -- everything placed in the library up to the present time. Usually the retrospective conversion is done by "matching" a library's old records (whether on cards or in a non-MARC format) to a database of full records in machine readable form. Rather than rekeying old records, a librarian can purchase the equivalent MARC records.
-
The fields requiring authority control are also the fields that use parallel tag construction. In general, in the 1XX, 4XX, 6XX, 7XX and 8XX fields, a personal name will have the last two digits 00.
-
The leader is the first 24 characters of the record. Each position has an assigned meaning, but much of the information in the leader is for computer use
-
MARC records are called "tagged" records. Before it becomes a tagged record, a MARC record (in what is called the MARC communications format), looks very different -- like one long run-on sentence. In the communications format, the fields are not preceded by tags. However, immediately following the leader is a block of data called a directory. This directory tells what tags are in the record and where they are placed (by a count of the characters to the position where each field begins). The directory is constructed (by computer) from the bibliographic record, based on the cataloging information, and, if any of the cataloging information is altered, can be reconstructed in the same way
-
The 008 field is referred to as Fixed-Length Data Elements, or Fixed Field Codes. Its 40 characters contain important information, but in an abbreviated form.
-
For example, there is a code in this field to indicate whether a book is large-print, a code to identify the country of publication, a code to identify juvenile materials, a code to indicate the language of the text, and so on.
-
Many librarians have chosen to maximize limited resources by acquiring cataloging data rather than creating it themselves. For almost a century they have been able to order sets of catalog cards for their new books from the Library of Congress, or, more recently, from book jobbers.
-
Others typed their own cards, using the Cataloging in Publication (CIP) data found on the verso of the title page of many books. Librarians also adapted the partial or full cataloging records printed in library journals or in bibliographies.
-
Colleges and universities with large library budgets joined bibliographic utilities such as OCLC, WLN, RLIN, and A-G Canada. For an on-going fee plus communication costs, their technical service departments went online with the utilities' powerful mainframe computers. These ventures allowed those libraries to use and contribute MARC records. Catalog cards could be ordered, and a printer could be hooked up to the system to receive data over the phone lines and print book labels.
-
Computer software programs allow an individual library to have its own self-contained circulation system or online public access catalog. These programs often can read, store, and print MARC records.
-
Two groups which are responsible for reviewing and revising MARC 21 format documentation are MARBI and the MARC Advisory Committee.
-
MARBI meets in conjunction with the MARC Advisory Committee at each ALA conference (annual and mid-winter). The major activity of the Committee is the review of discussion papers and proposals submitted by or through the Library of Congress for changes or additions to existing MARC formats, or the development of new MARC format support in emerging areas.
-
With the proliferation of computer systems in libraries, it became apparent that a standard was also needed for the exchange of MARC records on floppy diskette.
-
More recently, specifications have been developed also for the distribution of MARC records via file transfer (FTP)
-
When bibliographic records are evaluated, some important questions which need to be addressed are: What is the quality of the MARC data? Which MARC 21 fields are present? Is the data based on Library of Congress MARC records? If so, is the full information that is available on those files evident in the records? Is anything added to the record?
Some librarians ask several vendors of bibliographic data for printed examples of their MARC records in order to compare their fullness and compliance with MARC 21 standards.
-
The next logical questions to ask are: Does the library automation system being evaluated make full use of the cataloging information? Does it retain all the data and the MARC 21 content designators?
Does the system load in the full record, with no unreasonable or false limitations on such things as the number of subject headings it will index or the length of the note fields? Even though the disk contained excellent, full records, any library automation system will be able to use only what was transferred to the hard disk.
-
Are the MARC tags, indicators, and subfield codes still present on the librarian's data entry screen? Are the indicators used correctly? Are the subfield codes used correctly?
-
That brings up one other point. Does the system allow for downloading, or writing the records back out to a disk, to use in other projects such as a union catalog project? Will a program be available to write them in the MARC communications format?
-
-
22 Jan 10
-
A MARC record is a MA chine-Readable Cataloging record.
-
bibliographic record,
-
the information traditionally shown on a catalog card.
-
description
-
main entry
-
subject headings
-
call numb
-
title
-
publication information
-
"access points"
-
Access points are the retrieval points
-
select the subjects under which the item will be listed.
-
The patron does not have to imagine all the possible synonyms for the word he is looking for.
-
Dewey Decimal
-
Library of Congress
-
The purpose of the call number is to place items on the same subject together on the same shelf in the library.
-
-
24 Sep 09
-
18 Jul 09
-
29 Jun 09
Rhonda FrancisMARC Records
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06 May 09
-
10 Apr 09
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26 Mar 09
-
14 Feb 09
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11 Feb 09
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28 Oct 08
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23 Oct 08
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30 Aug 08
Tepcat KlingonThis document contains parts 1 to 6 of Understanding MARC Bibliographic
From Internet Explorer Links Library Class Assignments Cataloging
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01 Jul 08
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WHAT IS A MARC RECORD,
-
Authority control" means following a recognized or established form. Usually, a cataloger chooses subject and name headings from a list of approved headings.
-
Library of Congress Name Authority file
-
The term "retrospective conversion" describes a project that converts bibliographic records from their present form -- such as shelflist cards or a brief circulation record -- to full machine-readable bibliographic records.
-
Two groups which are responsible for reviewing and revising MARC 21 format documentation are MARBI and the MARC Advisory Committee.
-
-
08 May 08
Mary CarrollEasy cataloguing exercise
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14 Feb 08
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03 Feb 08
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20 Jan 08
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13 Jan 08
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04 Oct 07
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17 May 07
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10 Mar 07
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13 Feb 07
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02 May 06
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