Transcription: We covered a lot of material in this course, everything from working with external entities to working and making sure that your documents are both well formed and valid to even talking about working with external document type definitions and the way that you can actually reuse those document type definitions between multiple XML documents. But our discussion on document type definitions and entities doesn't end here. There's still a number of capabilities that we have yet to discuss and we're going to cover those in our next course. you
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