Group items tagged

side-contracts have become a common way

to produce and consume information about types of content for which HTML doesn't yet include nouns. The most prominent of these are WAI-ARIA, Microformats, and Schema.org.

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.

Breadcrumbs Again, I would say yes to this as well. Although breadcrumbs are not always necessary and can be used when not applicable, on large sites a breadcrumb trail can be an important navigation aid.

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:

An article with a title and metadata

An article with a title and subtitle

An article with a title, subtitle and metadata

The value of input elements whose type attributes are in the Text, Search, URL, or E-mail states and that are mutable (i.e. that do not have the readonly attribute specified and that are not disabled).The value of textarea elements that do not have a readonly attribute and that are not disabled.

Otherwise, if there is an ancestor element with a spellcheck content attribute that is not in the default state, then: if the nearest such ancestor's spellcheck content attribute is in the true state, then checking is enabled; otherwise, checking is disabled.