figure9c.ttl: Can :singletonPropertyOf be replaced with something more standard?

[lschmelzeisen]

Figure 9 of the paper (2.4.2) depicts an example of representing temporal context using singleton properties:

The example currently encodes this in RDF using :singletonPropertyOf:

examples/Section2/2_4_2_Reification/figure9c.ttl

Line 10 in 37cc7fd

:e :singletonPropertyOf :flight ;

This property type seems non-standard. Is there anything available in some standard with which we could replace this?

[aidhog]

If I recall correctly, the original paper uses rdf:singletonPropertyOf as they were proposing it as an extension of the RDF standard, but it's not actually defined there so I don't think it's a good idea to use this.

Searching in LOV doesn't reveal any other standard options: https://lov.linkeddata.es/dataset/lov/terms?q=singleton+property

[lschmelzeisen]

So would it be fair to say that there currently is no established standard on how to represent this example? If yes, we should note this in the file.

Also, if that is the case, we maybe potentially possibly could have cut it from the paper ;)