How do I save "DateTime imported" value in Digikam?

[Remco Viëtor]

On jeudi 18 mai 2017 23:53:57 CEST Andrey Goreev wrote:
> I thought digikam can read any tag from metadata. There is a section in
> settings to customize what tags to read /write, isn't it?
> 
But it still has to know which tag to read, and what the tag means. 
One property of XML (of which XMP is a derivative) is that a program should be 
able to parse any valid file, /ignoring/ tags  or attributes it doesn't know 
about. But such unknown tags may get lost on rewriting the file. 

So you can add an <iphone:DataTimeImport> tag to the XMP, but, since Digikam 
probably doesn't know about the tag, it will silently ignore it. On a rewrite 
of the XMP (say because you added a keyword, or changed the title), that 
<iphone:DataTimeImport> tag may very well be lost. And of course, Digikam 
won't do anything with it (no searching, no ordering according to import date, 
etc.)

Remco