Transcription: In this course, we dived very deeply into XML. We got into entities, not just as physical storage objects, but as predefined entities and internal entities that you can create yourself. We've got a few more contexts to the term entity that we're going to cover, but we'll get to that later. We've also talked about document type definitions and being able to control the structure of your documents. We're going to go into that even further in our next course. I'm David Harding. I'm with Keystone Learning Systems.