There are a few competing formats in the blogfeedsphere. The two major flavors are Atom and RSS 2.0. (RSS stands for Really Simple Syndication.) WordPress supports both formats out of the box, so you don't need to worry about support issues.
When you're browsing other people's blogs, though, you may wonder why they choose to use a particular format over another. The short answer is this: The blogger isn't choosing; the vendor of his blogging tool is. I'd say that 98 percent of the bloggers out there don't care which format their feed is in as long as newsreaders can consume it.
Because WordPress supports the two major RSS formats, the vast majority of readers will be able to read your blog.
• Notes. At first blush, you may think that notes are just like descriptions (which I cover in "Adding links" earlier in this chapter), but they're not. A description is text that pops up when someone hovers a mouse pointer over the link, whereas the text you enter in the Notes box appears on the page below the link (depending on your WordPress theme, that is; see chapters 11 and 12 for the story on themes).
• Rating. You can rate each link from 0 to 9 (0 being no rating and
9 being the highest) by making a choice from the Rating drop-down menu. Most themes don't display rating information, but you can alter a theme to show it (as you can for any of these optional settings), and you can sort links by rating.
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