In the last chapter, we developed two main XML documents. The first was an XHTML document - the same HTML document that we started with in the first chapter, but represented in XHTML. The XHTML document gets displayed just like an HTML document would, but you can also edit it and display it like XML, in a tree. The XHTML document doesn't really take full advantage of XML, though. We're still stuck using a markup language that doesn't really tie in with the content of our document. So the second XML document we developed used a markup language we specifically invented to hold information for our TV Guide.KeywordsMarkup LanguageCurly BracketSelect AttributeRelative PathContext NodeThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.