# File rexml/validation/relaxng.rb, line 279
      def expected
        return [ @prior.expected, @events[0] ].flatten if @current == 0
        return [@events[@current]]
      end

# File rexml/validation/relaxng.rb, line 274
      def matches?(event)
        @events[@current].matches?(event) || 
        (@current == 0 and @previous[-1].matches?(event))
      end

# File rexml/validation/relaxng.rb, line 264
      def next( event )
        if @current == 0
          rv = super
          return rv if rv
          @prior = @previous.pop
          return @prior.next( event )
        end
        super
      end