rmits a DOM implementer to supply one or more 
 implementations, based upon requested features and versions, as specified 
 in . Each implemented <code>DOMImplementationSource</code> object is 
 listed in the binding-specific list of available sources so that its 
 <code>DOMImplementation</code> objects are made available.
 <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.
<P>
<DL>
<DT><B>Since: </B><DD>DOM Level 3</