HTML and CSS Reference
don't know what public-key cryptography is, take a look at
And if you're still lost, you don't actually need this element!
<progress> is used to represent a “progress meter,” to indicate
the completion of a task—downloading a fi le, for example.
<meter> “represents a scalar measurement within a known range,
or a fractional value; for example disk usage, the relevance of
a query result, or the fraction of a voting population to have
selected a particular candidate.”
These are exciting elements that allow you to defi ne toolbars or
context menus for your application, with icons and associated
commands that execute scripts when activated. They're cooler
than a bucket full of Lou Reeds. However, no browser yet sup-
ports them, so we don't discuss them further.
microdata is a method of marking up elements with additional
machine-readable data, so that crawlers, search engines, or
browsers can extract information from the page. It's similar to
RDFa (a W3C standard) and microformats (a popular set of con-
ventions), and is already indexed by the Google search engine if
used in markup. However, no browser supports its associated API.
The scoped attribute on a style element tells the browser
to apply the styles to the element that the <style scoped>
element is in, and its children. This allows for highly localised
styling right inside your HTML, an <article> that contains a
scoped style block can be syndicated and retain its special
styles, for instance.
However, no browser supports it yet.