{
  "name": "m_min",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Returns the minimum m (measure) value of a geometry.",
  "arguments": [{
    "arg": "geometry",
    "description": "a geometry containing m values"
  }],
  "examples": [{
    "expression": "m_min( make_point_m( 0,0,1 ) )",
    "returns": "1"
  }, {
    "expression": "m_min(make_line( make_point_m( 0,0,1 ), make_point_m( -1,-1,2 ), make_point_m( -2,-2,0 ) ) )",
    "returns": "0"
  }],
  "tags": ["minimum", "measure"]
}