{
  "name": "make_valid",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Returns a valid geometry or an empty geometry if the geometry could not be made valid.",
  "arguments": [{
    "arg": "geometry",
    "description": "a geometry"
  }],
  "examples": [{
    "expression": "geom_to_wkt(make_valid(geom_from_wkt('POLYGON((3 2, 4 1, 5 8, 3 2, 4 2))')))",
    "returns": "'GeometryCollection (Polygon ((5 8, 4 1, 3 2, 5 8)),LineString (3 2, 4 2))'"
  }, {
    "expression": "make_valid(geom_from_wkt('LINESTRING(0 0)'))",
    "returns": "<empty geometry>"
  }],
  "tags": ["rules", "valid", "ogc", "according", "formed"]
}