{"fields":[{"name":"security_id","type":"string","description":"Persistfolio stable security identifier (PFHC-xxxxxxxxxx), stable across future releases."},{"name":"security_name","type":"string","description":"Most recent name printed for this security during this period."},{"name":"membership_start_date / membership_end_date","type":"date","description":"ISO dates bounding this continuous membership period."},{"name":"cik","type":"string","description":"SEC Central Index Key for the registrant, where resolved; UNRESOLVED is disclosed explicitly otherwise."},{"name":"event_type","type":"enum","description":"ADD_DELETE / MERGER_SUCCESSOR / NAME_CHANGE / SHARE_CLASS_CHANGE / RE_ADDITION / DELETE_ONLY / ADD_ONLY / CORPORATE_SEPARATION / OTHER."},{"name":"evidence_class / provenance_category","type":"enum","description":"Evidentiary basis and coarse source category for each constituent event."},{"name":"confidence / review_status","type":"enum","description":"Persistfolio's own confidence and review classification — explicit uncertainty rather than invented precision."}]}