RoleProperty
/docs/glossary/roleproperty/
Domain: UBOS Mesh
A slot with a value on the connection between two MeshObjects, as defined by a RoleType. This is the instance-level version of a PropertyType on an EntityType: when the edge between two MeshObjects is blessed with a RoleType, the PropertyTypes defined by the RoleType create the corresponding RoleProperties on the edge between the two MeshObject.