How to model relations between EC, Rhea, and GO

[cthoyt]

As suggested by Chris in biopragmatics/pyobo#168 (comment), I am bringing this to the RO issue tracker. I want to use well-defined RO properties to model the relationships between reactions in Rhea, molecular functions in GO, and gene products in EC so I can fill out all of the blanks in the following diagram. Further, we know of a protein that 1) has the molecular function, 2) catalyzes the reaction, 3) is an instance of the enzyme class in this diagram, so I also want to figure out the right way to annotate those.

Can RO do the following:

1. Let me know what relations exist that are appropriate for this
2. Help me mint new relations with appropriate semantics to cover the remaining