code: def get_original(document, xslt):
          
          dom = etree.parse(document)  # TODO: cuando este probando -
          # fuente:
          # http://stackoverflow.com/questions/16698935/how-to-transform-an-xml-file-using-xslt-in-python
          xslt = etree.parse(xslt)
          transform = etree.XSLT(xslt)
          newdom = transform(dom)
          return newdom
docs: Get the original chain given document path and xslt local path
  
          :param str document: local absolute path to document
          :param str xslt: local absolute path to xst file
          :return: new chain generated.
          :rtype: str