2 # blank (not defined)

Subfields Description

The first or unique date that is associated with the entity described in the 2XX field.

This date includes:

Date Reliability 1 9

The data element Era is mandatory if the subfield is used.

The latest date in the period that is associated with the entity described in the 2XX field.

This date includes:

# certain date

? uncertain date

Related Fields

122 CODED DATA FIELD - TIME

the dates to be used in the authorized access point. For

recording other dates or periods, use field 640.

EX 1

104 ##$a#1803#####$b#1869#####

authorized access points. Dates of birth and death that include the month and day associated with the

places are entered in field 640.

EX 2

104 ##$a#1637#####$b#1714#####

dates of birth and death associated with the places and the residence period in Paris are entered in

repeated fields 640. The date of birth may also include the month and day of the person’s birth.

EX 3

104 ##$a#1946#####$b#1958#####

640 1#$aFR$f#19461128#

640 2#$aFR$f#19581208#

EX 4

104 ##$a#19911107#

According to the cataloguing rules, the adoption date of the treaty is chosen as the main date for the

entity. Other dates (e.g., the ratification date, date of signature, etc.), are entered in fields 640.

EX 5

104 ##$a#1862#####

because the title, author, and reference number of the work in a thematic catalogue (241 $s) are more

relevant for the identification of the work.

EX 6

104 ##$a#1929#####

The main date of the entity (field 104) is not needed in the access points for this expression of a musical

work.

EX 7

104 ## $a#1990#####

arrangement of work) is performed by the same performers on different dates.