XHTML is an XML based version of HTML. Cleaner and stricter it allows developing XML documents browsable by web browsers both on desktops and on mobile telephones. This course introduces the differences between XHTML and HTML and overviews XHTML important elements.

The HTML 5.0 specification is the next coming revision of HTML. This new standard shall replace HTML 4.01, XHTML 1.0 and DOM Level 2 HTML. HTML 5.0 aims at reducing the need for proprietary plug-in-based rich internet application technologie4s, such as JavaFX, Silverlight and Adobe Flash.
The quality of our code is not just its execution but also its appearance. This course was developed based on the guidelines published by Google and based on my own professioanl experience. It overviews the very basic guidelines we should follow when coding our HTML files.