{"schema_id":"hc.dataset_asset.v1","schema_version":"1.1.0","data_snapshot_id":"docs/public-data/full-data-surface-matrix.tsv@2026-07-19#context.epa_aqi","record":{"asset_id":"context.epa_aqi","title":"Context EPA AQI","description":"EPA AirData/AQI archives. Support: county|year. Fields: median AQI; PM2.5 exceedance days.","data_family":"context_input","raw_source_or_access":"EPA AirData/AQI archives","example_internal_artifacts":"data_source_ledger.md; schema_registry.yaml","support_level":"county|year","targets_or_fields":"median AQI; PM2.5 exceedance days","pipeline_state":"panel_context","public_status":"draft","sensitivity":"low","visibility":"metadata_only","license_status":"public_source","recommended_public_surface":"Candidate environmental covariate panel","public_data_inventory_asset":null,"current_surfaces":{"rest":"/api/v1/data/assets/context.epa_aqi; /api/v1/data/observations; /api/v1/data/features; /api/v1/data/panels/{panel_id}","mcp":"get_data_asset; query_observations; query_features; get_panel_slice","openapi":"yes","docs":"data_source_ledger.md","sdk":"client.dataAssets.get(); client.observations.query(); client.features.query(); client.panels.getSlice()"},"canonical_profile":{"source_contract":"hc.source_snapshot.v1","canonical_contracts":["hc.observation.v1","hc.feature_record.v1","hc.panel_row.v1","hc.provenance_manifest.v1","hc.access_policy.v1","hc.artifact_manifest.v1"],"raw_retention":"Keep immutable source extracts or API response snapshots with source-specific cadence and terms metadata.","normalization":["normalize geographies, metric IDs, units, seasonal adjustment, and publication lag","separate event period, publication time, and retrieval time"],"engineering":["apply as-of joins","derive lags, rolling statistics, exposure measures, and geography rollups with transform versions"],"synthesis_policy":"Derived scenarios are allowed; observed context values and simulated context must remain different record types.","delivery":null},"delivery_targets":{"rest":["/api/v1/data/observations","/api/v1/data/features","/api/v1/data/panels"],"mcp":["query_observations","query_features","get_panel_slice"],"openapi":["Observation","FeatureRecord","PanelRow"],"docs":["source card","metric dictionary","publication-lag semantics","feature recipes"],"sdk":["client.observations.query","client.features.query","client.panels.getSlice"],"export_formats":["jsonl","csv","parquet"]},"inventory_asset":null,"related_artifact_ids":["public-data.contract_schema_bundle_json"],"related_provenance_ids":[],"payload_availability":{"level":"metadata_only","metadata_available":true,"sample_rows":false,"queryable_rows":false,"bulk_download":false,"runtime_verification":"contract_declared","reason":"This asset is discoverable, but its rows are not part of the public contract."},"gap_or_blocker":"Not in public-data inventory","next_step":"Add manifest row and aggregate panel candidate","provenance":{"provenance_id":"prov:context.epa_aqi","data_snapshot_id":"docs/public-data/full-data-surface-matrix.tsv@2026-07-19#context.epa_aqi","publication_date":null,"retrieval_date":"2026-07-19","model_version":null,"license_note":"Metadata-only surface. Policy status: public_source."},"access":{"visibility":"metadata_only","support_level":"county|year","sensitivity":"low","training_eligibility":"benchmark_only","license_status":"public_source"},"_links":{"self":"/api/v1/data/assets/context.epa_aqi","catalog":"/api/v1/data/catalog?asset_id=context.epa_aqi","schemas":"/api/v1/data/schemas?data_family=context_input","docs":"/api-docs","compatibility_rest":"/api/v1/data/assets/context.epa_aqi; /api/v1/data/observations; /api/v1/data/features; /api/v1/data/panels/{panel_id}","artifact":"/api/v1/data/artifacts/public-data.contract_schema_bundle_json"}},"provenance":{"provenance_id":"prov:context.epa_aqi","data_snapshot_id":"docs/public-data/full-data-surface-matrix.tsv@2026-07-19#context.epa_aqi","publication_date":null,"retrieval_date":"2026-07-19","model_version":null,"license_note":"Metadata-only surface. Policy status: public_source."},"access":{"visibility":"metadata_only","support_level":"county|year","sensitivity":"low","training_eligibility":"benchmark_only","license_status":"public_source"},"_links":{"self":"/api/v1/data/assets/context.epa_aqi","catalog":"/api/v1/data/catalog","docs":"/api-docs"}}