Here you can create, edit, delete the files used to syndicate your site content to others. By default phpnuke have the backend.php file to syndicate the news published on site. The same thing can be done with the rest of the content from your site. Basically you can create here many more backend files. Each file will syndicate a certain type of your site content. So you can syndicate News, Web Links, Downloads, Forums posts, Content, Reviews. Here you'll see a list[a table] of these files that can be edited, deleted or you can get the code for that file, just on the right side of the list[obviously on the beginning this list will be empty].
By completing the form that appears here you can create a new such file.
Type of feed file - The dinamically generated file can be set to be RSS 2.0, ATOM or RDF compliant. RSS is the most common feed format[...I think]
Type of information within feeds - You can choose what content do you want to syndicate: Forums posts, News, Contents, Downloads, Reviews, Web Links
Number of feeds within channel - Here you can choose how many feeds will be created
Show description in feeds? - Usually the feeds comes with a summary of the article[or details], however this is not required. You can choose here NOT to provide this summary
Show dates in feeds? - Like on the previous option you can choose not to display the dates in feeds. This aplies only to RSS or RDF type formats.
XML encoding of file - Here you can set the encoding type that you want to use for the feed file. This should be set to the default character set of your site language. Check the first line that defines "_CHARSET" from your site default languaghe file
Channel description - Enter here anything you think describes the best your feeds collections provided by this file[channel]
Channel image - Enter here the path to an image coresponding to this feed channel. Can be the logo of your site.
Copyright line from feeds - If you want to add a copyright note to this channel this is the place.
File name - Enter the name of the file[without the extension .php] that will be used to syndicate the desired content.
After completing the form you will be redirected to the second step of the creation where you can choose further more if you want to syndicate the content from a specific content category[Downloads category, Web Links category, Content category, Reviews categories, Forums] or from the entire area.
Hiting "Next step" button will create the code necesary to build the feed file. All you have to do next is to select the code from the textarea, copy to clipboard[don't forget about this :)] and paste into a file that have to named exactly as choosed before opened in your prefered text editor. Now place this file into your site root and now you can point your users toward this file by a small image link[you know those small images RSS, or ATOM showing that there is a feed file]. For this use the code in the red area.
At any time you can edit or delete your feed files.