Page History

MARC 21   Definition 

Tag 

LTS   Abbreviated Level Requirement 

Library of   Congress Control No.

010

Mandatory   if applicable.  Enter any DLC label   mounted on the cover.

ISBN

020

Enter |a   if it appears on the item (|z if you know it can’t possibly be valid, for   example if it’s not 10 or 13 digits long)

System   Control Number

035

Retain the   OCLC control number if present.  Do not   include an OCLC control number for a different manifestation.  Do not include an OCLC control number for a   non-English record (that is, 040 |b  must be blank or “eng”).

Cataloging   Source

040

Subfields   |a, |b, |c mandatory; |e rda and |d if applicable

LC Call   No.

050

Mandatory; see guidelines in this   procedurethis procedure

Authorized   access point

1xx

Mandatory   if applicable (includes 100, 110, 111, 130)

Preferred   title

240

Enter a   preferred title if known or readily inferred from the item; otherwise, omit

Title area

245

Subfield   |a is mandatory; |b and|c if applicable

Varying   form of title

246

Optional ;   use judgment

Edition   area

250

Mandatory   if applicable

Imprint

264: 1: (RDA);   260 (usually AACR2)

Mandatory   if applicable; |a, |b and |c should be present

Physical description

300

Subfields   |a and |c are mandatory; all other subfields are optional

Content,   Media, Carrier

336, 337,   338

Mandatory   on RDA records.  Use macro #r1 for   print monographs.

Series

490:0 :

Transcribe    series if present.  Do not trace the   series in an 830.  Remove an 830 if one   happens to be present on the in-process record.

Uncontrolled   Subject Terms

653

Mandatory   if applicable; see guidelines in this procedure

Added entries

7xx

All added   entries are optional