Before going on, take a minute to read over the Generating RSS and Atom Feeds page in our documentation. It will give you a basic overview of how we will proceed. When you have read it return here and proceed with the tutorial.
We're going to configure our Shopping Site scraping session so that it generates a feed of products based on a search parameter. That is, we'll give it a search keyword (e.g., bug or dvd), it will extract the product data, then create an XML feed out of the scraped data. For testing purposes we'll just access the XML feed from a web browser, though you could just as easily access it from an RSS/Atom reader.