Figure A.2: The source and the target of a link are 1) an entire module or 1) a segment of a module. The relata of the relation expressed in such a link are 1) an entire module or 2) a segment of a module, or 3) an information unit underlying an entire module or 4) an information unit underlying a segment of a module, or 5) an entity addressed in an entire module or 6) in one addressed in a segment of a module. [back to the text]