How are two instances in the knowledge base related?
When starting a task you don’t always know in advance what you are looking for. Finding the shortest path between two instances in a knowledge base can be a great way to explore connections because you do not need to provide any guidance. In the knowledge base below I have displayed two specific people using the query:
match $x has identifier "Barbara Shafner"; $y has identifier "Jacob J. Niesz"; get;
and then searched for relationships joining two of them using:
compute path from "id1" to "id2";
You can see below that the two people selected are married. The path query uses a scalable shortest path algorithm to determine the smallest number of relationships required to get from once concept to the other.
If you are looking for more specific connections you can of course use the subgraph functionality. In the following query only the blood relationships (parent/child relationships) are investigated and the resulting knowledge base is shown below. We have excluded marriage in this subgraph and as a result the shortest path is longer than before - it turns out the Barbara Shafner and Jacob J. Niesz are cousins (their mothers, Mary Young and Catherine Young, are sisters, their father being Jacob Young).
compute path from "id1" to "id2" in person, parentship;