client and server sides of the xml-rpc protocol (remote procedure calls that transmit objects encoded as xml over http)as well as standard html parserhtml parserthat works on similar principles and is presented later in this the third-party domain has even more xml-related toolsmost of these are maintained separately from python to allow for more flexible release schedules beginning with python the expat parser is also included as the underlying engine that drives the parsing process xml parsing in action xml processing is largeevolving topicand it is mostly beyond the scope of this book for an example of simple xml parsing taskthoughconsider the xml file in example - this file defines handful of 'reilly python books--isbn numbers as attributesand titlespublication datesand authors as nested tags (with apologies to python books not listed in this completely random sample--there are many!example - pp \lang\xml\books xml python &ampxml december jonesdrake programming python th edition october lutz learning python th edition september lutz python pocket reference th edition october lutz python cookbook nd edition march martelliravenscroftascher python in nutshell nd edition july martelli text and language