dataset_id: jp-election-db.derived-extraction-data
family: "municipality-series"
dataset: "proportional-party-comparison-2025-2026"
source_release_version: "2026-05-03-v050"
source_layer: "derived/extraction municipality-series/party-votes"
primary_selector_field: "jis_code"
primary_selector_index_dir: "by-jis"
row_grain: "comparison_key x jis_code x party_id"
built_at: "2026-05-03T12:35:46Z"
notes: "Non-canonical municipality x party proportional comparison rows for 2025 hc:pr to 2026 hr:block. Selector rows are target-side 2026-02-08 parties plus graph-only comparison bloc CDR_TJU. Pilot-specific CDR_TJU compares 2025 KMT+CDP against 2026 CDR+TJU; standalone CDR/TJU are excluded from this comparison selector. Contains votes, vote change rate against 2025 party votes, and municipality vote share."
source_election_set_keys:
  - "20250720_hc"
  - "20260208_hr"
files:
  - artifact_id: latest_nationwide
    path: products/jp-election/derived/extraction/municipality-series/proportional-party-comparison-2025-2026/latest/nationwide.csv
    sha256: 932332a4d552259ffed12c283f4498c82a33061e1aac074d5260c97019ca150f
    size_bytes: 3597696
    row_count: 19283
    notes: "Stable latest nationwide CSV."
  - artifact_id: latest_prefecture
    path: products/jp-election/derived/extraction/municipality-series/proportional-party-comparison-2025-2026/latest/prefecture.csv
    sha256: 3ceb12f94b39cdfae7d0f1a8de73c02251670db73f9b8a3c2385006557c4d636
    size_bytes: 73898
    row_count: 475
    notes: "Stable latest prefecture aggregate CSV for nationwide graph scope."
summary:
  primary_selector_field: "jis_code"
  primary_selector_index_dir: "by-jis"
  selector_file_count: 1912
  aggregate_selector_field: "prefecture_code"
  aggregate_selector_index_dir: "by-prefecture"
  aggregate_row_grain: "comparison_key x prefecture_code x party_id"
  prefecture_row_count: 475
  prefecture_selector_file_count: 47
  comparison_key: "20250720_hc_pr__20260208_hr_block"