One classic example is tree/graph structured data. I've worked extensively with modeling and querying medical concepts and relationships in RDBMS. I realize t

One classic example is tree/graph structured data. I've worked extensively with modeling and querying medical concepts and relationships in RDBMS. I realize there are tools like recursive common table expressions an materialized paths that can aide querying such data, but now that I'm working at a different job using neo4j, I can see how much simpler the medical informatics domain could be modeled and traversed in a graph database.