You might find this useful, with respect to the use of Role:
https://dataliberate.com/2015/04/15/the-role-of-role-in-schema-org/
Richard Wallis
Founder, Data Liberate
http://dataliberate.com
Linkedin: http://www.linkedin.com/in/richardwallis
Twitter: @rjw
On 22 May 2018 at 16:09, Thomas Pellissier Tanon <thomas@pellissier-tanon.fr
> wrote:
> Hello Peter,
>
> You are probably looking for http://schema.org/Role
> There is also a specific class for quantitative values: http://schema.org/
> QuantitativeValue
>
> Cheers,
>
> Thomas
>
> Le mar. 22 mai 2018 à 16:59, Peter F. Patel-Schneider <
> pfpschneider@gmail.com> a écrit :
>
>> Hi:
>>
>>
>> I seem to remember that there is (or was) a way in schema.org to
>> associate
>> additional information (a.k.a. qualifiers) with a value for a property on
>> an
>> item. I also seem to remember that this was done by having the property
>> point
>> at a placeholder and using a special property to link this placeholder to
>> the
>> real value.
>>
>>
>> In triples this would be something like:
>>
>>
>> :John :marriedTo _:a .
>>
>> _:a schema:value :Susan .
>>
>> _:a schema:startDate 2001 .
>>
>> _:a schema:endDate 2010 .
>>
>>
>> or:
>>
>>
>> :Sofa23 :width _:w .
>>
>> _:w schema:value 57 .
>>
>> _:w :unit :inch .
>>
>>
>> Is (Was) this part of schema.org or am I misremembering?
>>
>>
>> peter
>>
>>
>>
>>