Hi Thad,

thank you for your very helpful answer and great advice. I would prefer not to 
use “interested in”, because that is often different from “having a skill” 
(though there certainly is some statistical correlation). I am interested in 
art, but have absolutely no skill in drawing. On the other hand, I have 
substantial skill in doing tax declarations, but absolutely no interest.

I understand that Wikidata aims to capture facts that can – or could -  be 
verified by external sources. Therefore, skills are only relevant for Wikidata 
if they are certified by an institution. However, “interested in” seems even 
more subjective and difficult to verify.

Best wishes,
Cord


Von: Wikidata [mailto:[email protected]] Im Auftrag von Thad 
Guidry
Gesendet: Freitag, 9. Oktober 2020 21:41
An: Discussion list for the Wikidata project <[email protected]>
Betreff: Re: [Wikidata] Property to encode the skills of a person

Hi Cord,

We do not have such a property for various reasons but historically because of 
fear of extra vandalism (which I don't completely agree with), difficulty with 
adding references to support the statement claims (I agree that's hard and why 
certified_as is being discussed below and why P4968 was added to help), and 
other reasons.

I would suggest to look at the following Property proposals:

https://www.wikidata.org/wiki/Wikidata:Property_proposal/certified_as
https://www.wikidata.org/wiki/Wikidata:Property_proposal/ESCO_Skill

as well as:

https://www.wikidata.org/wiki/Property:P4968
https://www.wikidata.org/wiki/Property:P1576
https://www.wikidata.org/wiki/Property:P101
https://www.wikidata.org/wiki/Property:P106
https://www.wikidata.org/wiki/Property:P8258
https://www.wikidata.org/wiki/Property:P2650

I think your closest ally to help with an immediate problem would be to reframe 
it as "this person -> interested in 
P2650<https://www.wikidata.org/wiki/Property:P2650> -> food toxicology"  with 
the idea that they not only interested but also skilled or specialized in some 
field of study or area of research"  It's about the best you can do for 
now...but perhaps the other listed properties above help you more depending on 
the context.  For instance, a prominent notable professor or researcher can be 
said to be "skilled" in "ancient history" but it is more likely their "field of 
work" or "field of training" is in "ancient history".

For languages, you can already use  languages spoken, written or signed 
P1412<https://www.wikidata.org/entity/P1412> and native language 
P103<http://native%20language%20P103>

It's always best to look at the properties for this type 
P1963<https://www.wikidata.org/wiki/Property:P1963> on any particular entity 
type, such as looking and scrolling down on Q5 
human<https://www.wikidata.org/wiki/Q5> or Q901 
scientist<https://www.wikidata.org/wiki/Q901> which already lists many of those 
properties above.  Whatever is in properties for this 
type<https://www.wikidata.org/wiki/Property:P1963> is further used as a 
dropdown statement hint and its based on if you apply a instance 
of<https://www.wikidata.org/wiki/Property:P31> statement and fill in a more 
specific type for a person, like saying this person is an instance of chess 
player<https://www.wikidata.org/wiki/Q10873124>, or 
scientist<https://www.wikidata.org/wiki/Q901>, or 
politician<https://www.wikidata.org/wiki/Q82955>.

Thad
https://www.linkedin.com/in/thadguidry/


On Fri, Oct 9, 2020 at 12:59 PM Wiljes, Cord 
<[email protected]<mailto:[email protected]>> wrote:
Dear Wikidata community,

I am looking for a property to encode the skills (or expertise) that a person 
has, e.g. “C programming”, “ancient history”, “French”, “Ballroom dancing”. At 
best, it should be possible to add a qualifier for the skill level, e.g. 
“beginner”, “advanced”, “expert”. I have been looking for such a property on 
the properties page (https://www.wikidata.org/wiki/Wikidata:List_of_properties) 
but could not find one.

Maybe there is a more general solution  - like using “significant person” 
qualified by “object has role” + “friend” to denote “hasFriend”?

Best wishes,
Cord

-----
Cord Wiljes
https://www.wikidata.org/wiki/User:Wiljes
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