The current description somehow makes sense for JSON-LD, but it isn't very clear as content type independent definition.
Providing a shape in ShEx and SHACL should provide an unambiguous and validatable way of defining it.
I can write one in ShEx, it can also constrain that it has to use IRI and can't be a blank node, it would go something like this:
:Notification IRI {
a [ as:Update as:Add as:Delete as:Create ] ;
as:object IRI;
as:published xsd:dateTime ;
notify:state xsd:string
}
The current description somehow makes sense for JSON-LD, but it isn't very clear as content type independent definition.
Providing a shape in ShEx and SHACL should provide an unambiguous and validatable way of defining it.
I can write one in ShEx, it can also constrain that it has to use IRI and can't be a blank node, it would go something like this: