---
title: Introduction
framework: internetweb
role: article
path: apple-archive/documentation/InternetWeb/Conceptual/PubSub/Introduction
---

# Introduction

A guide describing the framework for subscribing to RSS and Atom feeds.

## Organization of This Document

This book contains the following chapters:

- [Understanding Feeds](../UnderstandingFeeds/UnderstandingFeeds.html#//apple_ref/doc/uid/TP40004945-CH3-SW5) describes what feeds are and how they work. - [Publication Subscription Overview](../overview/overview.html#//apple_ref/doc/uid/TP40004945-CH5-SW5) explains the architecture of Publication Subscription. - [Subscribing to a Feed](../subscribing/subscribing.html#//apple_ref/doc/uid/TP40004945-CH4-SW3) explains how to use Publication Subscription to subscribe to a feed. - [Viewing and Retrieving Content](../viewingcontent/viewingcontent.html#//apple_ref/doc/uid/TP40004945-CH6-SW3) describes how to read the data in a feed.

## See Also

For an in-depth description of the Publication Subscription framework, read:

- *Publication Subscription Framework Reference*

For more information about some of the technology areas used by Publication Subscription, refer to:

- *[Core Foundation Design Concepts](../../../../CoreFoundation/Conceptual/CFDesignConcepts/CFDesignConcepts.html#//apple_ref/doc/uid/10000122i)* to learn more about the Cocoa design patterns - *[Tree-Based XML Programming Guide](../../../../Cocoa/Conceptual/NSXML_Concepts/NSXML.html#//apple_ref/doc/uid/TP40001269)* to learn more about XML and how to use it in Cocoa

There are also a number of good websites about the different feed standards supported by Publication Subscription:

- For more information about the RSS 0.9, RSS 1.0 and RSS 2.0 formats, read [http://en.wikipedia.org/wiki/Really_Simple_Syndication](http://en.wikipedia.org/wiki/Really_Simple_Syndication). - For more information about the Atom Syndication Format, read [http://en.wikipedia.org/wiki/Atom_%28standard%29](http://en.wikipedia.org/wiki/Atom_%28standard%29).

[Next](../UnderstandingFeeds/UnderstandingFeeds.html)

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