Implement interface Entity #28

https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-527DCFF2

Interface Entity

IDL Definition

interface Entity : Node {
  readonly attribute  DOMString            publicId;
  readonly attribute  DOMString            systemId;
  readonly attribute  DOMString            notationName;
};

Attributes

• readonly attribute DOMString publicId
• readonly attribute DOMString systemId
• readonly attribute DOMString notationName

Overrides

• Node insertBefore(in Node newChild, in Node refChild)
• Node replaceChild(in Node newChild, in Node oldChild)
• Node appendChild(in Node newChild)
• Node cloneNode(in boolean deep)