Definition:
A concrete object that is the end point of the action and comes into existence through the action (i.e., a subtype of Result).
Example:
AN OAK TREE will grow from that acorn.
Product
[
+concrete
]
Definition:
Patient that exists at the starting point of action (inheritance from Source), which is transformed through the event into a new entity; concrete or abstract.
Example:
An oak tree will grow FROM THAT ACORN.
Material
[
+concrete
]