Appendix 3Graph Anatomy
Graphs are data models used to manage relationships between things. Or as Wikipedia[122] puts it, graphs are:
“… data structures used to model pairwise relations between objects.”
“Objects” here can be any things, or entities if that’s a better word for you. And “pairwise relation” simply means some kind of link or connection between a pair of these things (or objects or entities).
Now, in math terms, a graph is an ordered pair consisting of a vertex set (representing objects) and an edge set (representing links between objects), or G = (V,E) in the usual math notation, as shown in the following figure.
The vertex set ...
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