Kim Cameron posted his Fifth Law of Identity, and I was surprised that more people didn’t just jump in and agree. I was really surprised that Craig Burton didn’t jump for joy as the entire law parallels some of the work that Craig led at Novell years ago.
Kim’s new Law is as follows:
The Law of Pluralism:
universal identity system MUST channel and enable the interworking of
multiple identity technologies run by multiple identity providers.
reminds me of the original work at Novell on Open Protocol Technology -
OPT – which was when we began to support multiple application protocols
for file system access.
As a brief history, NetWare was a “next generation” kernel and
operating system when it was introduced to the market. For a
transport protocol, it used a variation of the Xerox XNS protocols that Novell renamed as IPX, SPX, RIP, SAP,
and others. On top of this transport (the equivilent of TCP/IP in
the Internet) was the application protocol for making file system
requests – the NetWare Core Protocol
or NCP. To simplify this, NCP can be thought of as similar to NFS
… a file access protocol. So where UNIX systems would use NFS
on a transport of TCP/IP, NetWare servers would be accessed from DOS
workstations using NCP on a transport of IPX.
The first step towards Open Protocol Technology – or a form of Pluralism – was with Novell NetWare v2 (actually it was version 2.15 in 1988!) when Novell added support for the Apple Talk Protocol Suite,
allowing Apple Macintosh computers to see a NetWare server as though it
were an Apple server. This was done by adding support for the
Apple transport protocols, and also the file protocols. So now
DOS and Windows workstations could access files on the server using
NCP/IPX, and Macintosh computers accessed the same files … using
their native tongue, the Apple File Protocol.
Soon after this, Novell added support for TCP/IP, NFS, and FTP with the
release of NetWare v3. It actually went even further when Novell
implemented the OSI protocol stack on NetWare. I still have a sealed box of NetWare FTAM which was the product where Novell implemented the FTAM file protocols on top of an OSI protocol stack!
In this example of “pluralism” Novell was able to create a product that
supported file system access via numerous transport protocols, and
numerous file access protocols. We had demonstration networks
showing where machines running DOS or Windows, along with
Macintoshes(?), and UNIX machines, were all sharing files on the
NetWare server. This was in 1989 through 1991!
If we fast forward to now this is a common feature of almost any
operating system! Even the Linux systems in use today have the
ability to mirror this type of functionality with multiple transport
protocol support, and projects like Samba, Netatalk, etc.
To me, this law is a very common sense approach to systems design and
allows for flexibility in implementations and usage. This makes