Re: XDegrees and document addressability

From: Lee Iverson (
Date: Thu Feb 22 2001 - 12:37:35 PST

In message <>, Eugene E
ric Kim writes:
>Over the past few weeks, we've been talking about issues that are relevant
>to granular addressability. One important issue that we haven't discussed
>yet is document addressability. Today, I found this article in my inbox:
>On paper, it sounds like XDegree's XRNS is what we need. It gives
>addresses to all documents, and it uses logical rather than physical
>addresses. There's a high-level description of XRNS at:
>There are two major issues, though: 1. No technical documentation is
>available yet, so we can't evaluate it; and 2. Will it be an open
>These issues won't be resolved anytime soon, but as Nicholas said
>recently, people are working on this stuff. The time is right.

Well, this doesn't seem clearly that different from the URN proposals
that the IETF has been kicking around for years. And from the Product
Description document, it seems as if it's at the same level of
granularity as any other "file naming" system. Nowehere near granular
enough for our purposes (at least at first flush).

Moreover, it sounds like their system is quite analogous to Gnutella
and the Ocean Store as far as object replication and distribution and
that's a huge can of worms to open when the data objects are not
themselves relatively static. I think its an important (eventual)
twist, but definitely not something we want to worry about at the

Lee Iverson SRI International 333 Ravenswood Ave., Menlo Park CA 94025 (650) 859-3307

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