code: private static String getLinkNameSpace(String target)
  	{
  		int pos = target.indexOf(':');
  		if (pos == -1)
  		{
  			return null;
  		}
  		else
  		{
  			return target.substring(0, pos).replace('_', ' ').trim()
  					.toLowerCase();
  		}
  	}
docs: Returns the LOWERCASE NameSpace of the link target