- From: Johannes Koch <koch@w3development.de>
- Date: Thu, 15 May 2003 22:21:39 +0200
- To: www-di@w3.org
Hi
One thing that IMHO is rarely mentioned when dealing with 'acceptable
xxxxx' attributes is 'acceptable URI scheme'. Some use cases:
1. A company's web site has a 'Contact' page with an email link.
UA 1 may be a fully-equipped communication tool including mail client,
so opening a mail compose window on activation of the link (success).
UA 2 may be configured to call an external email application (success).
UA 3 may be just a web browser and signal an error (failure).
2. A service specifically designed for mobile users offers phone numbers
of cinemas.
UA 1 may be a WAP phone with WTAI 'make call' support; the phone number
should be marked up as a link using the 'wtai:' scheme (success).
UA 2 may be an iMode phone; the phone number should be marked up as a
link using the 'tel:' scheme (success).
UA 3 may be a WAP phone without WTAI support; a 'wtai:' link does not
work in this browser and would annoy the user (failure).
3. A personal homepage contains a link to an IRC channel using the
'irc:' scheme.
UA 1 opens its IRC client and connects to the channel (success).
UA 2 signals an error (failure).
* http:
* ftp:
* mailto:
* data:
* tel:
* wtai:
* irc:
--
Johannes Koch
In te domine speravi; non confundar in aeternum.
(Te Deum, 4th cent.)
Received on Friday, 16 May 2003 03:39:37 UTC