RE: A revises about storing reification in RDF.

I use the column Pos in M_S table to denote that the reified fact statement
is a Subject or an Object in the statemnt about the fact. Then according to
the value 'S' or 'O' in column Pos, one can get the ID of the reified fact
statement from column Subject or Object in Statement table. below shows the
content in M_S table of the example above: 

As I believe I mentioned before, it is possible for both the subject and the
object to be reified statements.

Also, maybe I'm missing something, but it seems to me that whether the
subject or object or both of a statement refer to a reified statement is a
feature of the statement and thus I'd expect this indication to be in the
statement table, not in the model table.

Brian McBride

HPLabs