In this chapter, we've covered a lot of ground. We started out by installing Java, so we could use a parser to check our documents. We then created a Document Type Definition for our data, analyzed it, tweaked it, and converted it to a basic XML Schema.
All of this was designed to allow us to make sure our data was exactly as we expect it, because next we'll be writing programs to analyze it.
In the next chapter, "Getting Serious: XSL Processors and Server-Side Processing," we'll start doing some basic Java programming, as well as using server-side scripts to perform XSL transformations on our data. We will be taking our data and writing programs that will create product pages in preparation for taking orders.