URI/URL [Was Re: [LINK] Limit Email Size ...]

[Roger Clarke]

At 10:41 +1000 12/10/07, Marghanita da Cruz wrote:
>From a security perspective it would be ideal if all attachments 
>were replace by a URL or URI (can anyone explain the difference to 
>me?)


I use this slide to explain it by example:

URL (Universal Resource Locator/ion):
http{s}://host{:port-number}{/path{/{filename}}}

URI (Universal Resource Identifier):
service://host{:port-number}{/path{/{filename}}}
incl. ftp://ftp.isi.edu/in-notes/rfc3371.txt, i.e. not just http(s)

[Achtung:  the syntax of the above is indicative not disciplined!]


This may be clearer though:
http://en.wikipedia.org/wiki/URI


-- 
Roger Clarke                  http://www.anu.edu.au/people/Roger.Clarke/
			            
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Visiting Professor in Info Science & Eng  Australian National University
Visiting Professor in the eCommerce Program      University of Hong Kong
Visiting Professor in the Cyberspace Law & Policy Centre      Uni of NSW