CREATE TABLE IF NOT EXISTS gpkg_contents (
  table_name TEXT NOT NULL PRIMARY KEY,
  data_type TEXT NOT NULL,
  identifier TEXT UNIQUE,
  description TEXT DEFAULT '',
  last_change DATETIME NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
  min_x DOUBLE,
  min_y DOUBLE,
  max_x DOUBLE,
  max_y DOUBLE,
  srs_id INTEGER,
  CONSTRAINT fk_gc_r_srs_id FOREIGN KEY (srs_id) REFERENCES gpkg_spatial_ref_sys(srs_id)
);