text: /* global createNS */
  /* exported filtersFactory */
  
  var filtersFactory = (function () {
    var ob = {};
    ob.createFilter = createFilter;
    ob.createAlphaToLuminanceFilter = createAlphaToLuminanceFilter;
  
    function createFilter(filId, skipCoordinates) {
      var fil = createNS('filter');
      fil.setAttribute('id', filId);
      if (skipCoordinates !== true) {
        fil.setAttribute('filterUnits', 'objectBoundingBox');
        fil.setAttribute('x', '0%');
        fil.setAttribute('y', '0%');
        fil.setAttribute('width', '100%');
        fil.setAttribute('height', '100%');
      }
      return fil;
    }
  
    function createAlphaToLuminanceFilter() {
      var feColorMatrix = createNS('feColorMatrix');
      feColorMatrix.setAttribute('type', 'matrix');
      feColorMatrix.setAttribute('color-interpolation-filters', 'sRGB');
      feColorMatrix.setAttribute('values', '0 0 0 1 0  0 0 0 1 0  0 0 0 1 0  0 0 0 1 1');
      return feColorMatrix;
    }
  
    return ob;
  }());
  