REQ.238 should be modified.

[isotc211]

Justification: REQ.238 says Edge has association role "boundary", but it should be "node", according to the UML.

Also, formal definition should be modified, too.
Proposal: third line of REQ.238:
from : with association role boundary....
to : with association role node....

formal definition:
from: boundary:DirectedNode[2]
to: node:DirectedNode[2]

[isotc211]

The two terms in this statement are logically equivalent. Not a problem.

[isotc211]

The two terms in this statement are logically equivalent. Not a problem.

[isotc211]

The two terms in this statement are logically equivalent. Not a problem.