{"$schema":"https://json-schema.org/draft/2020-12/schema","$id":"https://pith.science/schemas/pith-open-graph-event/v1.json","title":"Pith Open Graph Event v1","type":"object","required":["event_id","event_type","subject_pith_number","target","payload","signer","created_at","supersedes","prev_event","signature","content_sha256","schema_version"],"properties":{"event_id":{"type":"string","pattern":"^sha256:[0-9a-f]{64}$"},"event_type":{"type":"string","enum":["record_created","graph_snapshot","author_attestation","timestamp_anchor","citation_signature","replication_record","storage_attestation","correction_issued","mirror_hint"]},"subject_pith_number":{"type":"string","pattern":"^pith:[0-9]{4}:[A-Z2-7]+$"},"target":{"type":"string"},"payload":{"type":"object"},"signer":{"type":"object","required":["signer_id","signer_type"],"properties":{"signer_id":{"type":"string"},"signer_type":{"type":"string"},"key_id":{"type":["string","null"]},"public_key_fingerprint":{"type":["string","null"]}},"additionalProperties":true},"created_at":{"type":"string"},"supersedes":{"type":"array","items":{"type":"string"}},"prev_event":{"type":["string","null"]},"signature":{"type":"object"},"content_sha256":{"type":"string","pattern":"^[0-9a-f]{64}$"},"schema_version":{"const":"1.0"}},"additionalProperties":true}