{"id":"municipal_afs_observation_audit","columns":[{"name":"report_year","type":["integer","null"]},{"name":"field","type":["string","null"]},{"name":"value","type":["number","null"]},{"name":"unit","type":["string","null"]},{"name":"source_url","type":["string","null"]},{"name":"source_pdf_page","type":["integer","null"]},{"name":"source_line","type":["string","null"]},{"name":"extraction_method","type":["string","null"]},{"name":"correction_note","type":["string","null"]}],"empty_values":"CSV empty fields and JSON null mean unavailable; an explicit zero is numeric zero.","source_reference":"Source URL plus page, row, column, or line fields where supplied. Financial columns keep their own budget stages."}