Which are the differences between HTML and XHTML???”
The differences are actually pretty minor. xHTML is basically more correct and more strict interpretation of HTML. HTML 4.0 allows designers to be rather sloppy with how the tags are written, which results in some browsers interpreting things radically different. While they can still display some things differently with xHTML of course, it’s just an effort for things to be more standard and more correct. Here is a list of some of the differences between the two. And another article that also describes the different doctypes such as strict and transitional, which will change how the browser renders the xHTML. If you are re-learning HTML it’s a good idea to just go ahead and code to the more strict standards of xHTML in my opinion. It is backwards compatible with HTML 4 and there
