Direct Acyclic Graph or DAG may be it. What is DAG? DAG is a directed graph data structure that uses a topological ordering. The sequence can only go from earlier to later.

So, calling knowledge encoded on top of a graph structure a "knowledge graph" sounds natural. And the people doing this, the data modelers, have been called knowledge engineers, or ontologists.

Suddenly, regular graphs start to pop up. That feature allowed the two authors to unearth a regular graph from all types of graphs: Any graph with enough edges contains a graph that mimics one of ...

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