The location of the document or null if undefined or if the Document
was created using DOMImplementation.createDocument. No lexical checking
is performed when setting this attribute; this could result in a null
value returned when using Node.baseURI.
The location of the document or null if undefined or if the Document was created using DOMImplementation.createDocument. No lexical checking is performed when setting this attribute; this could result in a null value returned when using Node.baseURI.