HTML5 development

The schema.org vocabulary can be used with both Microdata or RDFa 1.1 Lite syntax, and it has types for Event, Organization, Person, Product, Review, AggregateRating, Offer and hundreds of others.

One element can also have multiple properties (multiple itemprop="" names separated by spaces) with the same value: <p itemscope><span itemprop="guitar vocals">Chris Askew</span>  is so dreamy.</p>

One element can also have multiple properties (multiple itemprop="" names separated by spaces) with the same value: <p itemscope><span itemprop="guitar vocals">Chris Askew</span>  is so dreamy.</p>

One element can also have multiple properties (multiple itemprop="" names separated by spaces) with the same value: <p itemscope><span itemprop="guitar vocals">Chris Askew</span>  is so dreamy.</p>

for the sake of performance, it would make better sense to include the CSS first then this script

Since there is no heading in the nav element, it becomes “Untitled NAV”.

The sectioning elements act quite literally as their name suggests: they define sections of the parent element. These sections can be thought of as child nodes whose headings fall under their parent heading, regardless of their rank.

Sections may contain headings of any rank, but authors are strongly encouraged to either use only h1 elements, or to use elements of the appropriate rank for the section’s nesting level.

The Doctors’ advice on SEO is to follow Google’s time-honoured guidelines: write valid, cross-browser, accessible HTML, don’t misuse markup or “cloak” with CSS, make a site with a clear hierarchy and text links, and write good content:

The solution for now is to produce your videos in multiple formats. Table 1. Browser support by video format Browser MP4 WebM Ogg Internet Explorer 9 Yes No No Firefox 4.0 No Yes Yes Google Chrome 6 Yes Yes Yes Apple Safari 5 Yes No No Opera 10.6 No Yes Yes Note: For the latest compatibility information, always check the CanIUse website.

A more robust way to create the fallback is to use a JavaScript utility like Modernizr to evaluate the browser's capabilities and then dynamically write the video and source tags or embed the Flash video player using SWFObject.

Tip 3: The source tag should always include the "type" attribute with the correct MIME type value. You may need to add an .htaccess file to your server to define the MIME types as well. Check out the Video for everybody article for more tips on MIME types.