Here are the data structures with brief descriptions:

CSCOREP_Metric_Plugin_Info
CSCOREP_Metric_Plugin_MetricProperties	Properties describing a metric. Provided by the get_event_info function
CSCOREP_Metric_Properties
CSCOREP_MetricTimeValuePair
CSCOREP_SubstratePluginCallbacks
CSCOREP_SubstratePluginInfo