literal vs. resource

Both RDF & OWL seem to treat this like 
a "syntactic" issue. i.e., I don't think 
there's any real semantics behind the choice 
of literal or resource.

But it does make a difference in MKR.

The OWL distinction is 
    DatatypeProperty vs. ObjectProperty
which roughly corresponds to 
    attribute vs. relation
in MKR.

Basically, an attribute is a property of a
single entity, while a relation (my narrow
sense of the word) is a property involving
two or more entities.  Here are some simple
examples.

    attribute: length, mass, color
    relation: before, above, father

I make the same distinction between actions
and interactions.  For example.

    action: move, eat, speak
    interaction: causality, concert, conversation

Dick McCullough
knowledge := man do identify od existent done;
knowledge haspart proposition list;