boolean type in SVG 2 WebIDL specification

In https://svgwg.org/svg2-draft/idl.html both 'bool' and 'boolean' types
are present. Shouldn't all boolean types be declared as 'boolean'?

bool types are at:

dictionary SVGBoundingBoxOptions {
  bool fill = true;
  bool stroke = false;
  bool markers = false;
  bool clipped = false;
};

and

interface SVGGeometryElement : SVGGraphicsElement {
  bool isPointInFill(DOMPoint point);
  bool isPointInStroke(DOMPoint point);
};

Kind regards,

Henri Manson