Love to see that relationships (edges) are directional. I hate to see graph models where relationships are bi-directional as it loosens up data rules far too much with very little benefit.
I've worked with systems where the relationships are typed and can have attributes just like the vertices allowing the system to model data in a more intuitive fashion.
I've worked with systems where the relationships are typed and can have attributes just like the vertices allowing the system to model data in a more intuitive fashion.