There are many vocabularies. And you could create your own, too, of course (but you probably shouldn’t before you checked possible alternatives). You’d have to look for vocabularies for your specific needs, for example by browsing and searching on http://lov.okfn.org/dataset/lov/ (they collect and index open vocabularies), on W3C’s RDFa Core Initial Context (it lists vocabularies … Read more
yes what you’ve written is valid in HTML5, but it’s not all inline elements, I think it’s just <a> ‘s it applies to.. Reference: “Block-level” links in HTML5 Tip: if using this set the <a> to display: block; or there may be unintended visual styling results : Source: Test Case Update: It is “disallowed” for … Read more
It is impossible to put a heading element inside a p element in HTML markup, not just formally but because browsers implicitly terminate an open p element when they encounter a heading. So the question is meaningless: an element that cannot exist in a certain context cannot have any meaning (semantics) within that context. Instead … Read more
Most of these responses are good general advice, but not proper answers to the question, which I think is perfectly legitimate. HTML5 is already a moving target; browsers implement specs and innovate at different paces. There is no single thing called “valid HTML”, at least not that is worth using. If you are building a … Read more
Using a div instide a td is not worse than any other way of using tables for layout. (Some people never use tables for layout though, and I happen to be one of them.) If you use a div in a td you will however get in a situation where it might be hard to … Read more
Use <code> for inline code that can wrap and <pre><code> for block code that must not wrap. <samp> is for sample output, so I would avoid using it to represent sample code (which the reader is to input). This is what Stack Overflow does. (Better yet, if you want easy to maintain, let the users … Read more
http://www.w3.org/TR/html4/interact/forms.html#h-17.5 Buttons created with the BUTTON element function just like buttons created with the INPUT element, but they offer richer rendering possibilities: the BUTTON element may have content. For example, a BUTTON element that contains an image functions like and may resemble an INPUT element whose type is set to “image”, but the BUTTON element … Read more
Why are they using <i> tag to display icons ? Because it is: Short i stands for icon (although not in HTML) Is it not a bad practice ? Awful practice. It is a triumph of performance over semantics.