DenIntroduction to Web Feeds
What are Web Feeds?
A web feed, also known as an RSS feed or syndication feed, is a way for a website to share content so users may follow the site using the application of their choosing.
What is a Reader?
A reader (or aggregator) enables users to subscribe to feeds so they can view content from several websites in one spot. Readers come in all shapes and sizes with different features for different audiences. Some look similar to email apps. Others, like Den, are designed to show a lot at once with dashboard style organization. Some are made to fit feeds into your system toolbar. Some project feeds on your desktop. Some are built into web browsers either directly or through a browser add-on. Finally, there are many web applications available for following feeds.
Feed Formats
The most popular format for web feeds is RSS, short for Really Simple Syndication. Given its popularity, the acronym is often used when referring to internet syndication or web feeds in general.
Atom is another common format that offers more flexibility and versatility for publishers.
Both RSS and Atom feeds are based on XML (eXtensible Markup Language) and are interoperable in many ways. For example, it's common to find the Media RSS Specification used in both RSS and Atom feeds.
JSON Feed is a less popular standard that includes information similar to RSS or Atom feeds, but as the name implies, uses JSON (JavaScript Object Notation) instead of XML.
Den is compatible with RSS, Atom, and JSON Feed. All provide virtually the same experience. Some websites will offer a choice between formats. In those cases, choosing Atom or JSON may provide a small performance benefit over RSS.