The DOMImplementation interface provides a number of methods
for performing operations that are independent of any particular instance
of the document object model.
Creates an XML Document object of the specified type with
its document element. HTML-only DOM implementations do not need to
implement this method.
param
namespaceURI The namespace URI of the document element to create.
param
qualifiedName The qualified name of the document element to be
created.
param
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.
return
A new Document object.
exception
DOMException
INVALID_CHARACTER_ERR: Raised if the specified qualified name
contains an illegal character.
NAMESPACE_ERR: Raised if the qualifiedName is
malformed, if the qualifiedName has a prefix and the
namespaceURI is null, or if the
qualifiedName has a prefix that is "xml" and the
namespaceURI is different from "
http://www.w3.org/XML/1998/namespace" .
WRONG_DOCUMENT_ERR: Raised if doctype has already
been used with a different document or was created from a different
implementation.
Creates an empty DocumentType node. Entity declarations
and notations are not made available. Entity reference expansions and
default attribute additions do not occur. It is expected that a
future version of the DOM will provide a way for populating a
DocumentType.
HTML-only DOM implementations do not need to implement this method.
param
qualifiedName The qualified name of the document type to be
created.
param
publicId The external subset public identifier.
param
systemId The external subset system identifier.
return
A new DocumentType node with
Node.ownerDocument set to null.
exception
DOMException
INVALID_CHARACTER_ERR: Raised if the specified qualified name
contains an illegal character.
NAMESPACE_ERR: Raised if the qualifiedName is
malformed.
Test if the DOM implementation implements a specific feature.
param
feature The name of the feature to test (case-insensitive). The
values used by DOM features are defined throughout the DOM Level 2
specifications and listed in the section. The name must be an XML
name. To avoid possible conflicts, as a convention, names referring
to features defined outside the DOM specification should be made
unique by reversing the name of the Internet domain name of the
person (or the organization that the person belongs to) who defines
the feature, component by component, and using this as a prefix.
For instance, the W3C SVG Working Group defines the feature
"org.w3c.dom.svg".
param
version This is the version number of the feature to test. In
Level 2, the string can be either "2.0" or "1.0". If the version is
not specified, supporting any version of the feature causes the
method to return true.
return
true if the feature is implemented in the
specified version, false otherwise.