Bolt.Sips v2.0.11 Bolt.Sips.Types.Relationship View Source
Self-contained graph relationship.
A Relationship represents a relationship from a Neo4j graph and consists of a unique identifier (within the scope of its origin graph), identifiers for the start and end nodes of that relationship, a type and a map of properties.
https://github.com/boltprotocol/boltprotocol/blob/master/v1/_serialization.asciidoc#relationship