Re: N3 rules: literals as subject and object in built-in functions

Are you saying that "literal subject" is only needed for rules, and so it is an extension to RDF?

naudts guido wrote:
> Rules are necessary an extension to RDF.
> It is not possible to define rules within the semantics of RDF alone.
> It is possible to consider blank nodes as variables though,
> but only as local variables.
> But of course things like @forAll and @forSome are extensions.
> Formulas are supported however and they can be translated to RDF using lists and reifications. 
> Furthermore, all builtins are extensions to RDF.
> 
> Guido Naudts