Web Syndication - Web Standards: Mastering HTML5, CSS3, and XML - page 292

<item>
<title>News item 1</title>
<link>http://www.news1link.com</link>
<pubDate>Sun, 07 Aug 2011 08:48:00 +0200</pubDate>
<dc:creator>John Smith</dc:creator>
<category>Concerts</category>
<guid>http://www.news1link.com</guid>
<description>A bit more about news 1</description>
<content:encoded><![CDATA[ The full content of News #1. In CDATA sections, 
<a href="http://examp.com">markup code</a> can also be included. ]]></content:encoded>
</item>
</channel>
</rss>

The above example is for demonstration only, real-life applications usually contain many more item elements.

■ theoretically, an rSS channel can contain an arbitrary number of items. however, some rSS readers (such as the
news feed reader gadget in Windows Vista and Windows 7) do not support rSS files larger than approximately 150Kb or
2,800 lines, which corresponds to approximately 7 months of daily news. it is recommended that you keep the file size
under this limit to maximize interoperability.

Tip

Some of the presented elements are required, while others are optional but highly recommended. First we'll
examine the required elements.

Required Elements
As shown in the previous section, the rss element contains the channel element with all its contents. The required
elements of the channel element in RSS 2.0 are title , link , and description .

The title Element
The title element represents the name of the channel. It often coincides with the title of the web site it is associated
with. Listing 8-2 shows an example.

Listing 8-2. The Title of an RSS Channel

<title>John Smith Headlines</title>

The link Element
The link element is a URI representing the domain where the news feed is located. Listing 8-3 shows an example.

Listing 8-3. A Link in RSS

<link>http://example.com/</link>