Step 2.3

Step 2.3: Field Updates & Deletes

Changes to the MARC21 communications format have made many fields obsolete. If one field has been replaced by another, the change is shown in the Tag Updates table in this section.

If the field has been made obsolete without being replaced, the field is simply deleted from the bibliographic record. Fields that are deleted as part of MARS 2.0 are listed in the Field Deletes List in this section.

Field Updates Table

Fields and subfields converted by MARS 2.0.
(‘x’ represents any 2nd indicator value, ‘#’ represents a blank 2nd indicator value):

From	To		From	To
023	024 [8#]		315	310
211 [0x]	246 [2#]		350$a $b	037$c (CF,CR)
211 [1x]	246 [3#]		350$a	020$c (BK,VM,MU)
212 [0x]	246 [2#]		503	500
212 [1x]	246 [3#]		507	255 (MP)
212 [2x]	246 [3#]		512	500
212 [3x]	246 [3#]		523	500
214 [0x]	246 [2#]		527	500
214 [1x]	246 [3#]		537	500
265 $a	037 $b		543	583
308 $a & b	300 $a		570	500
308 $c, $d & f	300 $b		755	655
308 $e	300 $c		840	830

Field Deletes List

MARS 2.0 removes the following fields:

0XX	2XX	3XX	5XX	6XX	8XX
009	241	302	517	652	851
011		303	582	680
087		304		681
091		359		683

links

2.1 - 2.2 - 2.3 - 2.4 - 2.5 - 2.6 - 2.7 - 2.8

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