Page 127 - Cataloging and Classification for Library Technicians, 2nd Edition

Cataloging on Computers 113

tracting in formation from the item re mains the same, the rules ap -
plied will follow AACR2R for de scrip tive cat a log ing, Sears or
LCSH for sub ject heading, and LCC or DDC for clas si fi ca tion num-
ber. As in the card en vironment, where pieces of in formation are ar -
ranged on the card, in the com puter en vironment, the necessary
information re quires its proper place. The Li brary of Con gress
MARC for mat pro vides the struc ture that is fol lowed.

THE MARC FORMAT

All au tomated libraries fol low the MARC for mat. Fig ure 8.1 dem -
onstrates how a MARC re cord is or ganized, by fields with tag num bers
attached. This chart will pro vide you with some gen eral knowl edge of
what a MARC re cord in cludes and how it compares to the in forma-
tion placed on the cat alog card.
Within each hun dred group, much in formation can be expressed
by the “XX”. For ex ample, within the 1XX field for main en try, there
may be a 100 field for per sonal au thor, a 110 field for cor porate name,
or 111 field for con ference as main en try. In the 2XX field, there may
be 240 for uni form ti tle, 245 for ti tle and statement of re sponsibility,
250 for edi tion statement, and 260 for imprint state ment. These three-
digit tag num bers tell the com puter what kind of in formation is to fol -
low.

FIGURE 8.1. Fields in a MARC Record

0XX Con trol in for ma tion, such as the iden ti fi ca tion num ber, clas si fi ca tion num-
ber, etc.
1XX Main en try, usu ally name of the au thor
2XX Ti tle and state ment of re spon si bil ity
3XX Phys i cal de scrip tion, etc.
4XX Se ries state ment
5XX Notes
6XX Sub ject head ings
7XX Added en tries
8XX Series added en tries
9XX Reserved for lo cal use