Here are the data structures with brief descriptions:

Cnewrelic_app_config_t	Configuration used to describe application name, license key, as well as optional transaction tracer and datastore configuration
Cnewrelic_datastore_segment_config_t	Configuration used to configure how datastore segments are recorded in a transaction
Cnewrelic_datastore_segment_params_t	Segment configuration used to instrument calls to databases and object stores
Cnewrelic_distributed_tracing_config_t	Configuration used for distributed tracing
Cnewrelic_external_segment_params_t	Segment configuration used to instrument external calls
Cnewrelic_span_event_config_t	Configuration used for span events
Cnewrelic_transaction_tracer_config_t	Configuration used to configure transaction tracing