D>A method to request a list of DOM implementations that support the 
 specified features and versions, as specified in .<DD><DL>
<DT><B>Parameters:</B><DD><CODE>features</CODE> - A string that specifies which features and versions 
   are required. This is a space separated list in which each feature 
   is specified by its name optionally followed by a space and a 
   version number. This is something like: "XML 3.0 Traversal +Events 
   2.0"<DT><B>Returns:</B><DD>A list of DOM implementations that suppor