Creates a DOM Document object of the specified type with its document element.

  Creates a DOM Document object of the specified type with its document
element.

Note that based on the DocumentType given to create
the document, the implementation may instantiate specialized
Document objects that support additional features than
the "Core", such as "HTML" [DOM Level 2 HTML]
. On the other hand, setting the DocumentType after the
document was created makes this very unlikely to happen.
Alternatively, specialized Document creation methods,
such as createHTMLDocument [DOM Level 2 HTML]
, can be used to obtain specific types of Document
objects.
Returns: A new Document object with its document element. If the NamespaceURI, qualifiedName, and doctype are null, the returned Document is empty with no document element.
Parameters:
- namespaceURI - The namespace URI of the document element to create or null.
- qualifiedName - The qualified name of the document element to be created or null.
- doctype - The type of document to be created or null. When doctype is not null, its Node.ownerDocument attribute is set to the document being created.
Throws:
- DOMException - INVALID_CHARACTER_ERR: Raised if the specified qualified name is not an XML name according to [XML 1.0].
NAMESPACE_ERR: Raised if the qualifiedName is malformed, if the qualifiedName has a prefix and the namespaceURI is null, or if the qualifiedName is null and the namespaceURI is different from null, or if the qualifiedName has a prefix that is "xml" and the namespaceURI is different from " http://www.w3.org/XML/1998/namespace" [XML Namespaces] , or if the DOM implementation does not support the "XML" feature but a non-null namespace URI was provided, since namespaces were defined by XML.
WRONG_DOCUMENT_ERR: Raised if doctype has already been used with a different document or was created from a different implementation.
NOT_SUPPORTED_ERR: May be raised if the implementation does not support the feature "XML" and the language exposed through the Document does not support XML Namespaces (such as [HTML 4.01]).
Since: DOM Level 2

  Creates an empty DocumentType node.

  Creates an empty DocumentType node. Entity declarations
and notations are not made available. Entity reference expansions and
default attribute additions do not occur..
Returns: A new DocumentType node with Node.ownerDocument set to null.
Parameters:
- qualifiedName - The qualified name of the document type to be created.
- publicId - The external subset public identifier.
- systemId - The external subset system identifier.
Throws:
- DOMException - INVALID_CHARACTER_ERR: Raised if the specified qualified name is not an XML name according to [XML 1.0].
NAMESPACE_ERR: Raised if the qualifiedName is malformed.
NOT_SUPPORTED_ERR: May be raised if the implementation does not support the feature "XML" and the language exposed through the Document does not support XML Namespaces (such as [HTML 4.01]).
Since: DOM Level 2

  This method returns a specialized object which implements the specialized APIs of the specified feature and version, as specified in DOM Features.

  This method returns a specialized object which implements the
specialized APIs of the specified feature and version, as specified
in DOM Features. The specialized object may also be obtained by using
binding-specific casting methods but is not necessarily expected to,
as discussed in . This method also allow the implementation to
provide specialized objects which do not support the
DOMImplementation interface.
Returns: Returns an object which implements the specialized APIs of the specified feature and version, if any, or null if there is no object which implements interfaces associated with that feature. If the DOMObject returned by this method implements the DOMImplementation interface, it must delegate to the primary core DOMImplementation and not return results inconsistent with the primary core DOMImplementation such as hasFeature, getFeature, etc.
Parameters:
- feature - The name of the feature requested. Note that any plus sign "+" prepended to the name of the feature will be ignored since it is not significant in the context of this method.
- version - This is the version number of the feature to test.
Since: DOM Level 3

  Test if the DOM implementation implements a specific feature and version, as specified in DOM Features.

  Test if the DOM implementation implements a specific feature and
version, as specified in DOM Features.
Returns: true if the feature is implemented in the specified version, false otherwise.
Parameters:
- feature - The name of the feature to test.
- version - This is the version number of the feature to test.