Real life URN/Handle/DOI: browser-based id resolution starts via URL proxy
•
 id part1
id
server a1
URLn
web
server n1
page
id
web
browser
URLb
web
server b1
URLc
.
.
.
.
.
.
id
server a2
. . .
id
server ai
web
server n2
. . .
web
server nz
web
server b2
. . .
web
server bj
id-a1
id-b1
id-b2
id-a2
id-c1
id-c2
id-b1
id-b2
id-n2
id-n1
.
.
.
.
.
.
• Identifier is recorded as id embedded in URL (this is known as HTTP proxying), saving browser modifications or plugins
• Problems?  Yes, big complexity.
User
id query
manager
proxy
URLb
URL
(redirect)