HTML 5
Make sure your HTML5 document outline is backwards compatible
When using the HTML5 sectioning elements, make sure the document outline created by the headings is backwards compatible.
On using h1 for all heading levels in HTML5
The outline algorithm in HTML5 lets you use only h1 elements for all heading levels and still get a proper document outline. But browser and AT support is lacking, so use with care.
HTML5 document outline revisited
My current thinking on document outlines in HTML5 and how and when to use the new sectioning elements, all with HTML4 compatibility in mind.
HTML5 sectioning elements, headings, and document outlines
Getting the document outline you want is not as easy as you might think if you want to use the new sectioning elements in HTML5.
HTML5 sectioning elements, headings, and document outlines
Getting the document outline you want is not as easy as you might think if you want to use the new sectioning elements in HTML5.
HTML beyond HTML5
The WHATWG announces that they will now work on a versionless version of HTML, making it a moving target that may make it less than ideal for web developers to reference in their daily work.
HTML5 logo FAQ updated to add clarification
The W3C HTML5 logo FAQ has been updated to clarify what the logo and its accompanying icons represent and that CSS3 is not part of HTML5.
HTML5 now includes CSS3, SVG and WOFF?
Having a nice-looking logo for HTML5 is neat, but I think it’s unfortunate that the W3C are reinforcing the widespread misconception that HTML5 is pretty much anything “Web” that isn’t Flash.
HTML5 allows almost any value for the id attribute – use wisely
HTML5 allows almost anything as the value for the id attribute. This opens up possibilites but can also lead to bugs and maintainability problems unless used wisely.
HTML5 syntax guidelines
A few guidelines that will help you produce understandable and maintainable HTML5. Executive summary: stick to the syntax rules of XHTML.
HTML5 input types
HTML5 adds many new types of useful form controls. Some browsers support some of them already.
HTML 5 syntax
HTML 5 does not have the same strict syntax rules that XHTML does, which opens up for problems in teams of developers and makes teaching HTML more difficult.
The evolution and future of HTML
Sam Ruby, co-chair of the W3C HTML Working Group, has put together a number of select quotes to illustrate the evolution of HTML, from the beginning to where it is now.
Browsers will treat all versions of HTML as HTML 5
Browsers claiming to support HTML 5 are required to treat all text/html content according to the HTML 5 specification.