s such as NMTOKENS may have a child for each token.)
 For convenience, the Attribute object's getValue() method returns
 the string version of the attribute's value.
 <P>
 Attributes are not children of the Elements they belong to, in the
 usual sense, and have no valid Parent reference. However, the spec
 says they _do_ belong to a specific Element, and an INUSE exception
 is to be thrown if the user attempts to explicitly share them
 between elements.
 <P>
 Note that Elements do not permit attributes to a