How to use Photoshop:URL_List or some other Tag to List URL's related to image

[colink]

Consider 2 scenarios:
1. An image has a group of people, each person has their own web page or facebook page
2 An image has been created showing the Logos of a number of companies

I am looking for the most appropriate Tag to include a list of the relevant URL's. I know I could add to description tag, but is there another tag that may be more suited to identifying the subjects / contacts in the image?

I have found Photoshop:URL_List but very little that describes it's use.

Thanks ColinK

[Phil Harvey]

Ideally you would define a region for each face/logo:

https://exiftool.org/TagNames/MWG.html#Regions

The region structure supports any arbitrary XMP tag in the MWG Extensions Struct.  In this, you could maybe put an XMP-xmp:BaseURL tag or whatever you want.

- Phil

[StarGeek]

In the first case, I think technically you could fit that data into the PersonInImageWDetails structure, but parts of that are meant to be used with a Controlled Vocabulary and structures aren't necessarily easy to keep all the data in the proper places if you're using flattened tags.

I can't think of anything specific for logos.

For me, these would be places I would use HierarchicalSubject.  For example, a hierarchy of something like "Websites|Person name|http:\\facebook\blahblahblah" and "Logos|Company Logo".

But then I should have mentioned previously that it helps to have a Digital asset management (DAM) program that works well with HierarchicalSubject.  Lightroom, for example, does well.  And while there are things about iMatch 5 that I don't care for (still using iMatch 3 for a lot of stuff), it does have great options with regards to metadata and HierarchicalSubject in particular.

Here's an example.  I've been adding Timezone IDs (e.g. America/Los_Angeles, Europe/Paris) and names (Pacific Standard Time, Central European Summer Time) to images just because I've found an easy way to add them.  There's no tag that's made for it and if I created a tag specifically for it, it wouldn't show up in any DAM software anyway.  But dropping it into HierarchicalSubject, I end up with this (from iMatch 5)
.

[colink]

@Phil and @StarGeek

Thanks again for your prompt and detailed replies.
I think between the two suggestions I will be able to find a suitable solution - I was not thinking of adding data to relate to specific parts of the image but that might be solution for some of my images.
Colink