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"Bullard, Claude L (Len)" scripsit:
> So if the Public ID is used
> in RDF for the Semantic Web, where does uniqueness
> get conferred?
Public IDs that begin "IDN domain-name//" are as unique
as domains (which is to say, only during a given period of
time). This is part of ISO 9070 on Formal Public Identifiers.
> Further, there is the issue that URIs designate
> representations of resources and that these can
> vary over time/space/authorial_intent, etc,. and
> that this conflicts with the RDF requirement for
> insisting that the URI uniquely identifies one
> thing.
I hold that URIs designate resources. The GET method
returns some representation of the resource, if one is
available. This is equally true of an URN as of an URL.
> 1. What is the one thing that it identifies
> for URIs?
Some resources don't have representations, the "thing
without a rep" trick notwithstanding.
> 2. Are these resources (can only be one) or
> representations (can vary)?
Resources.
--
John Cowan jcowan@reutershealth.com http://www.reutershealth.com
"Mr. Lane, if you ever wish anything that I can do all you will have to do
will be to send me a telegram asking and it will be done."
"Mr. Hearst, if you ever get a telegram from me asking
you to do anything you can put the telegram down as a forgery."
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