For the purposes of this article, no it doesn't. If you were going to build your own aggregator or a program to read RSS feeds, you would care, but that's not the point of this article. For my purposes, I'm going to demonstrate RSS .91.

Here are the basics of RSS (no matter what the version) (view sample) RSS -:

1. It is XML. This means it must be well-formed, include a prolog and DTD, and all elements must be closed.
2. The first element in the document is the <rss> element. This includes a mandatory version attribute.
3. The next element is the <channel> element. This is the main container for all RSS data.
4. The <title> element is the title, either of the entire site (if it's at the top) or of the current item (if it's within an <item>).
5. The <link> element indicates the URL of the Web page that corresponds to the RSS feed, or if it's within an <item>, the URL to that item.
6. The <description> element describes the RSS feed or the item.
7. The <item> element is the meat of the feed. These are all the headlines (<title>), URLs (<link>) and descriptions that will be in your feed.

Using those basic elements, you can create an RSS feed of your site. But it could get very tedious to create that feed manually every time you update your site. The best way to create an RSS feed is to use a tool, such as a Weblog to create the headlines, links and descriptions for you automatically. I've listed my favorite blogging programs - all of which will create RSS for you along with the HTML for the blog.