DOMImplementation

CSSStyleSheet createCSSStyleSheet(
    in DOMString title, 
    in DOMString media) raises(DOMException); 

Document createDocument(
    in DOMString namespaceURI, 
    in DOMString qualifiedName, 
    in DocumentType doctype) raises(DOMException); 

DocumentType createDocumentType(
    in DOMString qualifiedName, 
    in DOMString publicId, 
    in DOMString systemId) raises(DOMException); 

HTMLDocument createHTMLDocument(
    in DOMString title); 

boolean hasFeature(
    in DOMString feature, 
    in DOMString version);