from xml.parsers.xmlproc import xmlproc
import sys

class DTDParser(xmlproc.DTDConsumer):
	def new_element_type(self, name, cont):
		type = None
		if cont == 'EMPTY':
			type = 'EMPTY'
		else:
			for e in map(lambda x: x[0], cont[1]):
				if e == '#PCDATA':
					type = e
				else:
					print "\"%s\" -> \"%s\";" % (name, e)
		if type != None:
			print "\"%s\" [label=\"%s\\n(%s)\"];" % (name, name, type)

if __name__ == '__main__':
	t = xmlproc.DTDParser()
	t.set_dtd_consumer(DTDParser(t))
	print "digraph \"%s\" {" % sys.argv[1]	
	t.parse_resource(sys.argv[1])
	print "}"