The Hunt for the Missing Data Type

A (directed) graph is a set of nodes, connected by arrows (edges). The nodes and edges may contain data. Here are some graphs: All graphs made with graphviz (source) Graphs are ubiquitous in software engineering: Package dependencies form directed graphs, as do module imports. The internet is a graph of links between webpages. Model checkers analyze software by exploring the “state space” of all possible configurations. Nodes are states, edges are valid transitions between states. Relational dat...