Discovering document content

[Narrator] Let's begin working with the DOM…by seeing how we can use the DOM APIs…to discover information that's in a document.…So here, in Visual Studio Code,…or whatever editor you're using,…in Chapter Four, open up DOMExample1_start and you can…see here that I've got a pretty simple HTML file.…Down here, in the HTML content, I've got an XML tag,…which I'm using to imbed XML content into the webpage.…And in case you're wondering, yes that is…perfectly legal to do within HTML.…

The browser will see the HTML tag and parse it…like any other tag, it just won't know what to do with it,…it won't do anything special with it.…Now, in real world usage, you probably…won't see XML used like this.…Typically, XML data will be the result of some…web service call or it will come from a database…or you retrieve it using Ajax,…and then operate on it separately.…But in the interest of keeping these examples simple…and self-contained, I'm just embedding the…XML content right here into the webpage.…Now I didn't have to use the name XML for the tag,…