Music Cataloging at Yale MARC Tagging

Use of the 045 field is optional. 045 is for the date of composition of the piece(s). A common error is use of the field for date of performance.

Indicators:
1st indicator	= no specific date 0 = one work with a specific date of composition 1 = more than one work with a date of composition for each work 2 = one work with a range of dates of composition
2nd indicator	= always blank

Subfields:
‡a: ‡b:	time period formatted date	a letter represents the century; a number represents the decade first four digits represent the year; two digits for the month; two digits for the day

Examples:
045 045 0 045 0 045 2 045 1	‡a x6x7 ‡b d1971 ‡b d19710211 ‡b d1971 ‡b d1974 ‡b d1971 ‡b d1974	from the 1960s or 70s (x = century; 6 and 7 = decade) one work, one date of composition one work, one date of composition: 2-11-1971 one work, multiple dates of composition: from 1971-1974 multiple works; multiple dates of composition; 1st work from 1971; 2nd work from 1974