def __init__ (self, filename) :
		XMLFileWriter.__init__(self,filename)
		doc = XMLElement(None,Document.DOCUMENT_NODE,"#document")
		comment = XMLElement(None,Document.COMMENT_NODE,"#comment")
		comment.set_attribute("data","created from python svgdraw module")
		doc.add_child(comment)
		self._svg_doc = doc
	def save (self) :
		"""Save SVG attributes as XML attributes
		"""
		self.set_attribute("x","%f" % self._x)
		self.set_attribute("y","%f" % self._y)
		self.set_attribute("xml:space","preserve")
		
		#text fragments
		self.clear_children()
		for txt,size in self._txt_fragments :
			#span
			span = XMLElement(None,ELEMENT_TYPE,"svg:tspan")
			self.add_child(span)
			span.set_attribute("x","%f" % self._x)
			span.set_attribute("y","%f" % self._y)
			span.set_attribute("sodipodi:role","line")
			span.set_attribute("style","font-size:%s" % write_float(size) )
			#txt
			txtelm = XMLElement(None,TEXT_TYPE)
			span.add_child(txtelm)
			txtelm.set_attribute("data","%s" % txt)
		#save