HTML and CSS Reference
In-Depth Information
F
IGURE
D-1
Data URIs in action
Other Emerging URL Forms
New protocols are emerging as the Web starts to converge with television and mobile
devices. For example, a telephone number might look like
tel:
number
,
where
number
may
include any special dialing prefixes. For example, here we have a link that would call a
directory assistance number:
<a href="tel:+1-212-555-1212">
New York City Directory Assistance
</a>
This syntax is already supported by browsers integrated with mobile devices like Apple's
iPhone.
A television channel URL form might look like tv://
channel,
whereby
channel
is either
an alphanumeric name (such as nbc or nbc7-39) or a numeric channel number. A variety of
esoteric schemes are out there already. If you are interested in new URL schemes, take a
look at the W3C area on addressing (www.w3.org/Addressing) for more information.
