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Subject: RE: [xri] Use of the word "synonym" in section 10
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Markus, > I know it's more complicated than that: But from my naive point of
view two XRI > identifiers are synonyms if for all possible input parameters they
return the same SEP(s). Cool. The important thing here (and it
really makes me happy to see it) is that you are establishing a model for what constitutes synonymity and identity.
I believe you are saying that if I resolve
=steven.churchill with a given set of input parameters and I resolve @ootao*steve
with the same set of input parameters, then the two XRIs are synonyms only if the
resolver returns the same set of SEPs. If so, then your notion of synonymity is
tied to the Resolver input parameters (the XRIs are synonyms with respect to a
given set of input parameters) and your notion of identity is tied to sets of
identical SEPs. This is a perfectly valid model. (If I misinterpreted your
model, I apologize, but it really doesn’t matter. You model may be a bit different
than what I described, but it is still a valid model.) Here is
another model: Two XRI identifiers are
synonyms with respect to a given set of resolution input parameters only if the
resolver returns the same highest-priority CanonicalID(s). This is the Canonical ID Verification
Model. It, too, is a valid model defining synonymity and identity. (And the
synonymity is verifiable by a resolver. J) Here is
a third model: With respect to my RP, a
set of XRI identifiers are synonyms only if my RP as has established an
association between the identifiers and the primary key of one of my RP’s
“account” records. Note that for this third model, synonymity
is irrespective of resolver input
parameters. In fact it is really quite irrespective of XRI
resolution (although resolution may be required for authentication.) Nonetheless,
this is a valid—and will likely be a widely used—model for XRI
synonymity. The point is, Markus, that your definition
of synonymity is perfectly valid, and so are countless others. With regard to
my original point, if we are going to use the term “synonym” in the
Resolution specification, we should do so only with respect to a specific model
that establishes its meaning. ~ Steve From:
markus.sabadello@gmail.com [mailto:markus.sabadello@gmail.com] On Behalf Of Markus Sabadello
On 6/8/07, Steven
Churchill <steven.churchill@xdi.org>
wrote: Drummond,
I
don't understand the use of the term "synonym" in section 10. In
English, if two words are synonyms, then they have the same (or roughly the
same) meaning. In the Identify field, if two identifiers are synonyms, then
they refer to the same identity. As
I try to express in my text for section 11, these concepts are dependent upon
the "model" (or "system") defining the notions of
synonymity and identity. In a Banking system, identifiers may include a
person's name(s) and account number. In that same model, identity may be defined as "the human
being person having a given SSN and DOB". (Don't get confused by the fact
that a SSN is also a type of identifier. That is incidental to the model. We
are talking here about establishing the definition of identity. Once that is done, then Steven
Churchill and Steve Churchill can be synonymous identifiers for the same
identity.) In the XRI Canonical ID Verification model, there is a clear notion
of synonymity and absolute identity. In any case, the model needs to be
formally defined before we can start referring to this thing or that thing as a
being a synonym. A synonym to what? Section
10 introduces the term synonym without establishing a model that defines either
synonymity or identity. As Gabe and others have correctly pointed out, XRI
supports many such models. What are synonyms within one model are not
necessarily synonyms within another model. It
is not helpful to use the term synonym outside a model defining how two
identifiers get mapped to the same identity. ~
Steve
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