HTML5: XFBML validates only if served as application/xhtml+xml
The XFBML markup language passes the W3C validation in HTML5 only if served as application/xhtml+xml.
Insights on the adoption of this new standard with case-use examples on the new APIs introduced by HTML5.
The XFBML markup language passes the W3C validation in HTML5 only if served as application/xhtml+xml.
Using HTML5 in a way that is forward- and backward-compatible, by taking into account browser support and accessibility.
The main differences between the section and div elements in HTML5.