Discovering Relations in Knowledge Graphs Using the Sampo Model

Knowledge graphs represent both explicit and implicit relations between things like persons and places. While the number of potential relations is essentially unlimited, most of such connections are fundamentally uninteresting. For example, two things might both be instances of owl:Thing class, which is a connection, but not an interesting one. Potentially interesting relations can be predefined, and then mined from the knowledge graph using SPARQL CONSTRUCT queries. These relations can be represented as instances and explored using faceted search. While this makes it possible to search connections between two individuals, it also makes it possible to find relations between larger groups such as connections between persons of a certain profession and places within a certain country.