[Digikam-devel] [Bug 301357] New: Support incomplete dates (without time, day, month), like TIFF DateTime supports

[Aleksej R. Serdyukov]

https://bugs.kde.org/show_bug.cgi?id=301357

            Bug ID: 301357
          Severity: wishlist
           Version: 2.6.0
          Priority: NOR
          Assignee: digikam-devel at kde.org
           Summary: Support incomplete dates (without time, day, month),
                    like TIFF DateTime supports
    Classification: Unclassified
                OS: Linux
          Reporter: deletesoftware at yandex.ru
          Hardware: Debian testing
            Status: UNCONFIRMED
         Component: Dates
           Product: digikam

Old photos scanned from paper often have no precise date or time known, but
only with precision of a day, a month, or even a year.  Strangely, e.g.
DateTimeOriginal can only be specified with precision no less than that of a
second.

digiKam (1.9.0 from Debian testing and 2.6.0rc4 from unstable) doesn’t seem to
let me specify a date without time or day or month.  I can add a DateTime
property with such precision using ExifTool, and digiKam can read and display
it in a sidebar, but it cannot use it as the image’s date, e.g. with the Adjust
Time & Date feature: it says the source timestamp is missing.

Reproducible: Always

Steps to Reproduce:
1. Try specifying a date without time, day, or month.

1. Specify such a date directly in the file’s metadata, and try to get digiKam
to import it.
Actual Results:  
No luck.

Expected Results:  
Please add support for imprecise dates.

At first I didn’t notice that digiKam cannot use DateTime, but apparently the
files I tried with had contained a complete date, too.

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