URI space: a definition

To clarify the meaning of the term "URI space" I suggest the following:

The term "space" is used in the graph theoretic sense: a _space_ is a
container of
a graph, a rectangle drawn around a graph to partition it. One can have arcs
between nodes in different spaces. For example, the physical space might
contain a node for everything which exists in the
physical world. The URI space contains a node for every URI, each labelled
by the corresponding URI.  One might connect nodes in the physical space to
URI space e.g. {me} owl:sameAs
<http://www.example.org/person/JonathanBorden>

For an example of software which manipulates graphs, and uses this meaning
of the term "space" see: http://www.ai.sri.com/~grasper/

Jonathan