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Re: [T2TRG] draft-hartke-t2trg-ciri-00 review

Dave Thaler <dthaler@microsoft.com> Mon, 21 January 2019 23:22 UTC

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From: Dave Thaler <dthaler@microsoft.com>
To: Klaus Hartke <hartke@projectcool.de>
CC: Carsten Bormann <cabo@tzi.org>, "draft-hartke-t2trg-ciri@ietf.org" <draft-hartke-t2trg-ciri@ietf.org>, Ari Keränen <ari.keranen@ericsson.com>, "T2TRG@irtf.org" <T2TRG@irtf.org>
Thread-Topic: [T2TRG] draft-hartke-t2trg-ciri-00 review
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Subject: Re: [T2TRG] draft-hartke-t2trg-ciri-00 review
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I agree that "Recompose the CBOR-encoded IRI components to a URI" could be
done without referencing RFC 3987 and without using the term "IRI" (as opposed to CIRI
which you can define).  Although I wonder if in so doing, you'd run into all the same
issues that failed to achieve consensus with the rfc3987bis.

And I also agree that draft-hartke-t2trg-coral-06 likely has the same issues because
it uses IRIs instead of URIs.

-----Original Message-----
From: Klaus Hartke <hartke@projectcool.de> 
Sent: Monday, January 21, 2019 1:59 PM
To: Dave Thaler <dthaler@microsoft.com>
Cc: Carsten Bormann <cabo@tzi.org>; draft-hartke-t2trg-ciri@ietf.org; Ari Keränen <ari.keranen@ericsson.com>; T2TRG@irtf.org
Subject: Re: [T2TRG] draft-hartke-t2trg-ciri-00 review

Dave Thaler wrote:
> Once you have COAP/HTTP proxies, you pull in all that baggage.

Right. Currently, converting a CIRI to CoAP options is defined as:

1. Recompose the CBOR-encoded IRI components to an IRI 2. Convert the IRI to a URI according to RFC 3987 3. Decompose the URI to CoAP options according to RFC 7252

It sounds like a good idea to rewrite section 4.2 to output a URI and define the conversion as:

1. Recompose the CBOR-encoded IRI components to a URI 2. Decompose the URI to CoAP options according to RFC 7252

> Furthermore, the conventional wisdom is that there's no problem that 
> putting IRIs on the wire solves that isn't better solved by putting 
> URIs on the wire.

The Semantic Web relies extensively on IRIs, and some formats like Turtle put IRIs "on the wire" rather than URIs. E.g.:

   @prefix loc: <https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fexample.org%2Flocation%2F&amp;data=02%7C01%7Cdthaler%40microsoft.com%7Cc9d0643be43d49fc77ab08d67febbc9f%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C1%7C636837047803044411&amp;sdata=AiwjzFDEBICXw%2B%2BpJOUok5l1eTBaszbiQl8YW6n91Ng%3D&amp;reserved=0> .

   loc:Montréal a loc:city .

Would this be considered "UI layer"? If not, I'm not sure if URIs would improve things:

   loc:Montr%C3%A9al a loc:city .

(Is that even valid?)

Since the CoRAL textual format [1] uses IRIs in a similar way, some advice on IRIs in formats intended to be read and written by humans would be very welcome.

Klaus

[1] https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Fdraft-hartke-t2trg-coral-06&amp;data=02%7C01%7Cdthaler%40microsoft.com%7Cc9d0643be43d49fc77ab08d67febbc9f%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C1%7C636837047803044411&amp;sdata=HbsWjAZLY%2B6kw2qQrarD6pt2478qZsZcRyflKk5VoRE%3D&amp;reserved=0

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