According to the IPTC Spec:
IPTC Date Created
Represented in the form CCYYMMDD to designate the date the intellectual content of the objectdata was created rather than the date of the creation of the physical representation. Follows ISO 8601 standard. Where the month or day cannot be determined, the information will be represented by “00”.
But... If I enter 19840000 (for example) into a .TIF file of a scanned negative for which only the year of exposure is known, then Lightroom appears to ignore it and leaves the IPTC Date Created field blank. Worse still, a subsequent export of that image doesn't include an IPTC Date Created at all (not even a reproduction of the original value).
Does anyone happen to know if this is by reason of:
(a) My misundertanding of the IPTC Spec?
(b) Program design?
(c) Software bug?
(d) Operator error - I've overlooked a setting somewhere?
(e) Insanity (it's driving me nuts!)
How does anyone else cope with recording partial dates for scans of ancient material?
I've also tried stuffing exif:datetimeoriginal fields into the TIF, but here also LR ignores those with 00 in month or day and discards the original value on export. (Admittedly the EXIF spec talks about using 'blanks' to represent unknown data but I haven't figured out how to make exiftool accept 'blanks' yet).
Regards, Andrew.
Operating System: Windows 7
Exact Lightroom Version (Help menu > System Info): 6.13 [ 1141928 ]
IPTC Date Created
Represented in the form CCYYMMDD to designate the date the intellectual content of the objectdata was created rather than the date of the creation of the physical representation. Follows ISO 8601 standard. Where the month or day cannot be determined, the information will be represented by “00”.
But... If I enter 19840000 (for example) into a .TIF file of a scanned negative for which only the year of exposure is known, then Lightroom appears to ignore it and leaves the IPTC Date Created field blank. Worse still, a subsequent export of that image doesn't include an IPTC Date Created at all (not even a reproduction of the original value).
Does anyone happen to know if this is by reason of:
(a) My misundertanding of the IPTC Spec?
(b) Program design?
(c) Software bug?
(d) Operator error - I've overlooked a setting somewhere?
(e) Insanity (it's driving me nuts!)
How does anyone else cope with recording partial dates for scans of ancient material?
I've also tried stuffing exif:datetimeoriginal fields into the TIF, but here also LR ignores those with 00 in month or day and discards the original value on export. (Admittedly the EXIF spec talks about using 'blanks' to represent unknown data but I haven't figured out how to make exiftool accept 'blanks' yet).
Regards, Andrew.
Operating System: Windows 7
Exact Lightroom Version (Help menu > System Info): 6.13 [ 1141928 ]