Dividing the Categories
Most of these ten broad categories mirror the various sections of the AACR2 cataloging rules, giving structure to the MARC format. As seen in the above list, again as in the DDC, it is possible to create a range of numbers within each category that covers many different types of information. MARC cataloging done by the Library of Congress uses the unabridged AACR2 rules, allowing for several different ways of entering the information in each descriptive area, depending on the level of detail needed. For example, an author might be a single word, a forename-surname combination, a name with an honorary title, the name of a business or corporation, the name of a meeting or conference, a government department, etc. In the 1XX section of MARC, a different tag can be assigned to each of these possibilities, making the cataloging information very precisely coded. An example of some of these options is:
100 Main entry—personal name
First indicator 0 Forename
An example of the use of this tag and indicator would be:
100 0 $aSaki,$d1870-1916.
First indicator 1 Single surname
An example of the use of this tag and indicator would be:
100 1 $aWoolls, Blanche.
First indicator 2 Multiple surname
An example of the use of this tag and indicator would be:
100 2 $aGarcía Márquez, Gabriel,$d1928-
110 Main entry—corporate name
First indicator 0 Inverted name
First indicator 1 Jurisdiction name
An example of the use of this tag and indicator would be:
110 1 $aUnited States.$bCongress.$bSenate.$bSpecial Committee on Aging.
First indicator 2 Name in direct order
An example of the use of this tag and indicator would be:
110 2 $aRussell Sage Foundation.$bCharity Organization Dept.
110 2 $aPlymouth Cordage Company, Plymouth, Mass.
111 Main entry—conference name
First indicator 0 Inverted name
First indicator 1 Jurisdiction name
First indicator 2 Name in direct order
An example of the use of this tag and indicator would be:
111 2 $aWorkshop on Intelligent NDE Sciences for Aging and Futuristic Aircraft $d(1997 :$cUniversity of Texas at El Paso)
Each of these different tags very clearly defines the type of Main entry that follows, and the correct use of these tags can make very detailed searches of the cataloging information possible. If needed, a computer program can be designed to specify just corporate authors, or just conference names, etc. While very few, if any, libraries use this detail of search in their catalogs, the possibilities are built into the MARC format, allowing for future development of this option.
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