Working with Apache XML-RPC
There are a lot of different ways for two computer programs to communicate with each other over the Internet or another network. The simplest of all may be XML-RPC, which is short for XML Remote Procedure Call, a protocol developed in 1998 by Dave Winer of UserLand Software and Microsoft to foster web services.
Client/server implementations of XML-RPC are now available for most operating systems and programming languages in wide use. Winer publishes a directory of them on the Web at http://www.xmlrpc.com.
XML-RPC works by transmitting XML over HTTP, the same protocol that's used by web browsers and web servers. XML was covered in Hour 21, “Reading and Writing XML Data,” and you'll get more practice with the XML Object ...
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