Complex
URN/Handle/DOI resolution
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
.
.
.
.
.
.
User
id query
manager
proxy
URLb
URL
(redirect)
• Ideally, server-initiated stages obviate most browser-directed stages, but assumption that name assigning authority predicts final
server is now shaky
• Architecture
must depend on many systems, messages, points of failure