[Digikam-users] IPTC: Person Shown / PersonInImage [Take 2]

[Jean-François Rabasse]

On Tue, 16 Apr 2013, Jack Tummers wrote:

> @Jean-François,
> 
> This sounds all very reasonable and I agree with you totally.
> Perhaps I can convince my client to stop using PersonInImage, for future
> sake :) That would solve my problem too.

Need to add something, I was a bit wrong when I wrote :

> As IPTC is an older standard, lists didn't exist and the Person
> in Image field is a single text field, not a variable length array.

It's true that IPTC did exist before RDF formats, but PersonInImage
isn't part of the IPTC core standard. It has been added as an extension
and is encoded as Embedded IPTC into XMP. It's not in the Adobe IPTC
part of images files but in the XMP part and encoded as a list (rdf:Bag).
So, add/remove operations remain possible for software aware of this.

But the system remains uneasy to manage, compared to structured tags.

And the need for specialised tools to postprocess metadata in order to
suit such or such client program needs (get such or such data here and
write elsewhere) remains too...

Regards,
Jean-François