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Subject: Draft -07 feedback from another Visa person
- From: "Wachob, Gabe" <gwachob@visa.com>
- To: "'xri@lists.oasis-open.org'" <xri@lists.oasis-open.org>
- Date: Thu, 28 Aug 2003 14:27:27 -0700
Terence Spielman of
Visa (in a group outside of ours) gave me some feedback in the form of questions
that I wanted to share with the TC. Hopefully we can address these detailed
questions, and in doing so improve -07 significantly as well as gather material
for the upcoming FAQ.
My initial responses
to some of these questions will come in a separate email
-Gabe
---------
XRI
Comments
340-341 Why are
cross references only absolute? For simplicity
or
conciseness? Is this just
a nomenclature issue?
i.e.
identifiers (relative, etc) satisfy
local
cross-referencing
needs?
146 Is scheme interoperability
with HTTP a requirement or fringe?
482-483 Scheme
also indicates a connection/transport protocol. In
XRI
this is lost, which eliminates
the possibility of inferring a
default port. I would argue that you might want to add
some
language here
like:
"Within a federated namespace, the omission of a port
may
indicate a default port. This use is at the discretion
of
the governing namespace authority (and implementing
applications)."
511 Is xri a
valid URI scheme for an xref?
519 Why define
global-xri here? I don't see the relevance.
521 First use
of "node"? What does it mean in the context of XRI?
525 Is this to
imply that only when the entire XRI is in () that
it is
unresolvable? I would presume that XRIs can
include
cross-references in path-segments that are also
unresolvable.
550-551 I didn't get
the meaning of persistent or re-assignable identifiers
out of this
description.
2.2.3.1 Is it
allowable to escape unicode characters? For example, if
one
wanted to express an international XRI in IA5 (ASCII)? In
this
case, the %AB format described in 2.2.3.1 is insufficient to
support
the expanded character width.
694 Does the
lack od idempotency affect semantics or syntax? I would
hope it
would only be syntax.
2.2.3.3 How
about this as an alternative?
Escape all current
escapes (%s).
Escape all syntactic elements with
cross references (parens).
Escape all
parens.
878-879 Why are XRI
authorities compared in a case-insensitive manner?
Section
3 (I still need to do some reading)
Global:
Has there been
any work on DECODING XRIs? It's not immediately
clear from the
ABNF that decoding is unambiguous.
In addition,
aside from unresolvable references, is it possible
to canonicalize
XRIs? This is a highly desireable feature
(for equivalence, at a
minimum).
An XRI is not
a URI (because of the expanded syntax). But
is an URI an
XRI? (no, because of different scheme (xri)).
I think it would be
nice to all URIs be valid XRIs.
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