Check it out at amazon HTML 4.01 and XHTL 1.x Differences:Home Gym

Hoping to one day have this setup at my home:
Body-Solid EXM3000LPS Light Commercial Gym

Differences from HTML 4.01 and XHTML 1.x
The following is a cursory list of differences and some specific examples.
New parsing rules: oriented towards flexible parsing and compatibility; not based on SGML
Ability to use inline SVG and MathML in text/html
New elements: article, aside, audio, bdi, canvas, command, data, datalist, details, embed, figcaption, figure, footer, header, keygen, mark, meter, nav, output, progress, rp, rt, ruby, section, source, summary, time, track, video, wbr
New types of form controls: dates and times, email, url, search, number, range, tel, color
New attributes: charset (on meta), async (on script)
Global attributes (that can be applied for every element): id, tabindex, hidden, data-* (custom data attributes)
Deprecated elements will be dropped altogether: acronym, applet, basefont, big, center, dir, font, frame, frameset, isindex, noframes, strike, tt
dev.w3.org provides the latest Editors Draft of “HTML5 differences from HTML 4”, which provides a complete outline of additions, removals and changes between HTML5 and HTML 4.