Hi Uldis,
> Good to see you online! :)
I have always been :)
>
> 1) I am looking for a property for pointing to a thumbnail /
> cover image associated with a bibo:Document.
>
> As you pointed out in your reply, the only option at the
> moment is using foaf:depiction. What could be done is to
> create a specialization of this property to define a thumbnail
> which would have a bibo:Document as its domain (instead of
> foaf:thumbnail which has a foaf:Person as its domain).
>
>
> schema:thumbnailUrl is another option (to be sure applications
> "understand" this info we can use both schema:[...] and foaf:depication).
>
> re. a bibo:[...] property for this use case - looks like there is a need.
>
> as with any new term the question is what to call this property and
> how to describe it: (a) a thumbnail; (b) a cover image (more specific
> to books, ...); (c) something else that includes both thumbnails and
> cover images.
>
> in my use case it is an "reasonably-sized" image showing the object.
> it is not exactly "thumb-sized" (largest dimension <= 1024) but it's
> smaller than the original scans.
Yes, I agree with that. Could you create a new issue on GitHub for the
addition of this property? We should then discuss its scope, definition
and if it should be a sub-class-of something else that exists.
>
> 2) How to link a document (e.g. a letter) to the scanned
> images of this document?
>
>
> You can use bibo:uri for this. In the past we had bibo:url, but if
> my memory is good we created bibo:uri to broaden its scope. That
> way you can refer a document, or a collection of documents, to its
> URI location (URL, local file location, etc.)
>
>
> not ideal as a document may have many pages but a "uri" property
> implies that this is an identifier for the whole document.
>
> in a related discussion (on Twitter) Rurik suggested using dct:hasPart
> / isPartOf:
> -
https://twitter.com/CaptSolo/status/729989445760516096
>
> that might work for files "attached to the object" if we don't have a
> more precise property.
>
> we also have a more specific sub-use-case here, will write about that
> a bit later.
Yeah I agree that this is suboptimal. Please create another GitHub issue
to track the addition of such a property.
>
> 3) How to link a digital object to the URI of the organization
> that holds the original object (this is more from the domain
> of manuscripts or museum holdings, but applies to my use case
> of letters too)?
>
> mods:physicalLocation is an option
>
>
> Maybe, but I can't see that property defined in [1]
>
>
> thanks - turns out there's different names for MODS XML tag
> (physicalLocation) and RDF property (locationPhysical).
I think this would be worth a new property/mechanism in Bibo as well. A
new github issue? :)
>
> Otherwise, there is always bibo:owner which you can use to refer a
> document or a collection of documents to its owner (which then we
> should infer that the document is located at the owner's location,
> which is obviously not always true).
>
>
> bibo:owner is a good suggestion as we need to point to the
> organization holding the original (not necessarily to any physical
> location) - would help to avoid adding yet another ontology to the mix.
Yes but a specific location property in bibo would be much better. I
thought we had this discussion about location years ago, but apparently
not. So this is definitely missing.
> P.S. shouldn't bibo:uri be an object property?
The idea here is that bibo:uri is a sub-property-of bibo:identifier
which are textual identifiers. Bibo URI includes all the kinds of URIs
including URLs and such. But I think it has always been confusing (maybe
even more now that bibo:url doesn't exist anymore). I am open to
suggestions here to make things clearer, a GitHub issue would be
warranted to document the process.
Thanks,
Fred