Definition instance of, proper instance etc. need to work with RDF terms instead of names

[doerthe]

Many times in the document, instances are used in connection with the term "name", that is, we replace a blank node by a name. We need to go through the document and always use rdf term instead.

[doerthe]

I refer to these sentences in the spec (and possible others):

"An instance with respect to a vocabulary V is an instance in which all the names in the instance that were substituted for blank nodes in the original are names from V."

"A proper instance of a graph is an instance in which a blank node has been replaced by a name, or two blank nodes in the graph have been mapped into the same node in the instance."

[doerthe]

we can no longer use the word "name" here since names are literals or iris.