Starting development with Neo4j - Neo4j in Action - page 48

Note
To be semantically correct, the friendship relationship should be bidirectional, but Neo4j's
graphs are directed, which means that each relationship must have well-defined start and
end nodes. Bidirectional relationships in Neo4j can be modeled with two separate relation-
ships, one in each direction. For simplicity, we've modeled friendships as single, directed
relationships. As you'll see in later chapters, this will not affect our querying capabilities
inNeo4j,because relationships canbefollowed ineither direction, whichwill simplify our
model significantly.
Okay,youhaveafewusers,representedasboxes,whoarefriendsinthesocialnetwork.To
differentiate between users, you can add a name property to each one, as shown in figure
3.3 .
Figure 3.3. Richer model with a name property assigned to each user
Figure 3.3 finally looks like a proper social network. But your goal is to build a social net-
work of movie lovers, so the next step is to add a few movies to the model.
You can represent movies as boxes with a name property, as shown in figure 3.4 .