It didn??™t matter
because as long as each application was able to convert its internal processes into a standard form of
communication, the XML-RPC protocol, then the transaction could be completed.
Clearly this can lead to some very powerful interactions such as the one between GarageSale and eBay.
We will continue this chapter and the next with a look into some examples of how the Zend Framework
components can bypass some of the complexities of web services to take advantage of such interaction. We??™ll
start by one that almost all readers are probably most familiar with; web feeds and the benefits of using
Zend_Feed to produce and consume them.
11.2 Zend_Feed
The Zend Framework manual describes Zend_Feed as providing ???functionality for consuming RSS and Atom
feeds.??? However, we are going to start from the opposite end of that transaction by showing how it can also be
used to produce RSS and ATOM feeds. We??™ll then show some examples of consuming web feeds.
11.2.1 Producing a feed
If you took up the challenge mentioned at the start of this chapter to list all the formats available for web feeds
you??™d have started with the RDF or RSS 1.* branch that includes RSS 0.9, 1.0 and 1.1 then moved to the RSS
2.* which includes RSS 0.91, 0.92 and RSS 2.
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