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Contents
A - Detailed
Date Encoding | B
- Examples | C
- MARC21 to DLDD Conversion | D
- Change Log
A.
Detailed Date Encoding Instructions
|
DLDD TAG
|
ELEMENT NAME
|
CONTENT
|
COMMENTS
|
| ddDateValue |
Date Value |
Date numeric in ISO 8601 Format
|
e.g.,
2002
17970110
|
| ddDateRange |
Date Range |
's' Single date
'b' Beginning date of a range
'c' Start date of (serial) item
currently published
'e' Ending date of a range
'a' Alternate single date |
|
| ddDateSchema |
Date Schema |
'b' Common Era BCE
(BC)
'c' Common Era CE (AD)
'h' Hebrew calendar
'a' Arabic calendar
'o' Other, not specified |
|
| ddDateType |
Date Type |
'o' Date of original
'r' Date of reproduction
'm' Date of intermediate item
'c' Copyright Date
|
Corrected from "ddDateVersion"
10/31/02. |
| ddDateConfidence |
Date Confidence |
'1' Known date
'2' Date identified with
high degree
of certainty
'5' Probable date
'7' Highly speculative date
'9' Date known to be incorrect |
|
| ddDateOther |
Other Date
Attribute |
'sc' Serial item
still being published
'sx' Serial item no longer being published
'ib' Inclusive dates of bulk of collection
|
Not yet implemented |
B. Examples:
Detail Date Encoding vs. Simple Date Encoding
1) Original probably created between BCE 1000
BCE 500. Reproduction created in 1997.
|
Option 1
ddDateValue | 1 | 1000
ddDateRange | 1 | b
ddDateSchema | 1 | b
ddDateType | 1 | o
ddDateConfidence
| 1 | 5
ddDateValue | 2 | 500
ddDateRange | 2 | e
ddDateSchema | 2 | b
ddDateType | 2 | o
ddDateConfidence | 2 | 5
|
ddDateValue | 3 | 1997
ddDateRange | 3 | s
ddDateSchema | 3 | c
ddDateType | 3 | r
ddDateConfidence | 3 | 1
|
|
|
|
Option 2
|
dd046_a | 2 |
m
dd046 | 2 | -1000
dd046 | 2 | -500 |
dd046_a | 1 |
s
dd046 | 1 | 1997
|
|
2) Original created in either 25 BCE or 34
CE.
|
Option 1
ddDateValue | 1 | 25
ddDateRange | 1 | s
ddDateSchema | 1 | b
ddDateType | 1 | o
ddDateConfidence | 1 | 5
ddDateValue | 2 | 34
ddDateRange | 2 | a
ddDateSchema | 2 | c
ddDateType | 2 | o
ddDateConfidence | 2 | 5
|
|
|
|
Option 2
dd046_a | 1 | m
dd046 | 1 | -25
dd046 | 1 | 34
|
|
C. MARC21
to DLDD Conversion
008/06
code
|
ddDateRange |
ddDateSchema |
ddDateType |
ddDate-
Confidence |
Comments
|
|
b
|
n/a |
n/a |
n/a |
n/a |
Do not convert |
| c |
b |
c |
o |
1 |
Serial current |
| d
- Date1 |
b |
c |
o |
1 |
Serial ceased |
| d
- Date2 |
e |
c |
o |
1 |
Serial ceased |
| e |
s |
c |
o |
1 |
Detailed date |
| i
- Date1 |
b |
c |
o |
1 |
Inclusive dates |
| i
- Date2 |
e |
c |
o |
1 |
Inclusive dates |
| k
- Date1 |
b |
c |
o |
1 |
Bulk dates |
| k
- Date2 |
e |
c |
o |
1 |
Bulk dates |
| m
- Date1 |
s |
c |
o |
1 |
Multiple single dates |
| m
- Date2 |
a |
c |
o |
1 |
Multiple single dates |
| n |
n/a |
n/a |
n/a |
n/a |
Do not convert |
| p
- Date 1 |
s |
c |
o |
1 |
Production / Distribution |
| p
- Date 2 |
a |
c |
o |
1 |
Production / Distribution |
| q |
s |
c |
o |
7 |
Questionable Date |
| r
- Date 1 |
s |
c |
o |
1 |
Reprint / Original |
| r
- Date 2 |
a |
c |
r |
1 |
Reprint / Original |
| s |
s |
c |
o |
1 |
Single date |
| t
- Date 1 |
s |
c |
c |
1 |
Copyright / Publication |
| t
- Date 2 |
a |
c |
o |
1 |
Copyright / Publication |
| u
- Date 1 |
b |
c |
o |
5 |
Serial Status unknwn [?] |
MARC21: 008 Date-Type Codes
06 - Type of date/Publication status
b - No dates given; B.C. date involved
c - Serial item currently published
d - Serial item ceased publication
e - Detailed date
i - Inclusive dates of collection
k - Range of years of bulk of collection
m - Multiple dates
n - Dates unknown
p - Date of distribution/release/issue and production/recording
session when different
q - Questionable date
r - Reprint/reissue date and original date
s - Single known date/probable date
t - Publication date and copyright date
u - Serial status unknown
| - No attempt to code
D. CHANGE LOG
- 2002-10-31: Marked ddDateOther as "not
yet implemented"
- 2002-10-31: Completed Marc21 to DLDD Detailed
Date table
- 2002-10-31: Updated Option 2 examples to
show dd046 rather than ddDate_1 and ddDate_2;
included new 046_a in examples
- 2002-10-31: Corrected detailed date BCE
examples by removing minus sign from ddDateValue
- 2003-09-11: Corrected examples to remove
extraneous sequence numbers. (SPD)
Last revision:
09/06/13
© Columbia University Libraries
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