RSS、XML-RPC、SOAP

For most of this book, my examples are going to focus on XML protocols. These are XML applications used

for machine-to-machine exchange of information exchange across the Internet over HTTP.

Three such XML protocol applications are of particular interest: RSS、XML-RPC、SOAP.

RSS: is used to exchange headlines and abstracts between different Web news sites.

XML-RPC: supports remote procedure calls across the Internet by passing method names and arguments

embedded in an XML document over HTTP.

SOAP: a more complex implementation of this idea called SOAP. Whereas XML-RPC uses only elements,

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SOAP adds attributes and namespaces as well. SOAP even lets the body of the message be an XML

element from some other vocabulary, so it opens up a host of other interesting examples.