DOMImplementation interface provides a number of methods
+ * for performing operations that are independent of any particular instance
+ * of the document object model.
+ * See also the Document Object Model (DOM) Level 3 Core Specification.
+ */
+public interface DOMImplementation {
+ /**
+ * Test if the DOM implementation implements a specific feature and
+ * version, as specified in DOM Features.
+ * @param feature The name of the feature to test.
+ * @param version This is the version number of the feature to test.
+ * @return true if the feature is implemented in the
+ * specified version, false otherwise.
+ */
+ public boolean hasFeature(String feature,
+ String version);
+
+ /**
+ * Creates an empty DocumentType node. Entity declarations
+ * and notations are not made available. Entity reference expansions and
+ * default attribute additions do not occur..
+ * @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 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
+ */
+ public DocumentType createDocumentType(String qualifiedName,
+ String publicId,
+ String systemId)
+ throws DOMException;
+
+ /**
+ * 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.
+ * @param namespaceURI The namespace URI of the document element to
+ * create or null.
+ * @param qualifiedName The qualified name of the document element to be
+ * created or null.
+ * @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 with its document element.
+ * If the NamespaceURI, qualifiedName, and
+ * doctype are null, the returned
+ * Document is empty with no document element.
+ * @exception 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
+ */
+ public Document createDocument(String namespaceURI,
+ String qualifiedName,
+ DocumentType doctype)
+ throws DOMException;
+
+ /**
+ * 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.
+ * @param 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.
+ * @param version This is the version number of the feature to test.
+ * @return 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.
+ * @since DOM Level 3
+ */
+ public Object getFeature(String feature,
+ String version);
+
+}