# File rexml/dtd/dtd.rb, line 23
      def Parser.parse_helper( input )
	contents = Parent.new
	while input.size > 0
	  case input
	  when ElementDecl.PATTERN_RE
	    match = $&
	    source = $'
	    contents << EleemntDecl.new( match )
	  when AttlistDecl.PATTERN_RE
	    matchdata = $~
	    source = $'
	    contents << AttlistDecl.new( matchdata )
	  when EntityDecl.PATTERN_RE
	    matchdata = $~
	    source = $'
	    contents << EntityDecl.new( matchdata )
	  when Comment.PATTERN_RE
	    matchdata = $~
	    source = $'
	    contents << Comment.new( matchdata )
	  when NotationDecl.PATTERN_RE
	    matchdata = $~
	    source = $'
	    contents << NotationDecl.new( matchdata )
	  end
	end
	contents
      end