code: def dtdAttrDesc(self, elem, name):
          
          ret = libxml2mod.xmlGetDtdAttrDesc(self._o, elem, name)
          if ret is None:raise treeError('xmlGetDtdAttrDesc() failed')
          __tmp = xmlAttribute(_obj=ret)
          return __tmp
docs: Search the DTD for the description of this attribute on
             this element.