SOSA specification examples: Systems (Sensors, Actuators, Samplers)

Examples from the SOSA/SSN specification whose root resource is a systems (sensors, actuators, samplers) resource. Each Turtle example is validated against the SHACL rules of ogc.sosa.properties.system, and converted to JSON-LD by the ttl-to-jsonld transform, whose output is validated against the ogc.sosa.properties.system building block (JSON Schema, JSON-LD context and SHACL).