I don’t like having to implement an RDAP client that would have to send two 
queries.

One to get the domain information, and if the resource does not exist, then 
another query to see if it’s available.

Checking for a reason on why the domain name is not available could or could 
not be expensive, but this should not be a reason to disallow it at the 
‘presentation’ layer of the protocol.

In my opinion, we should have some OPTIONAL fields in the original negative 
response to signal whether the name is available or not, and if not, a way to 
provide a reason. If this is mandated or not by registry policy / contract, it 
should be a different issue.

regards

—
Francisco Obispo
Uniregistry Inc.
On 16 Dec 2016, at 3:34, Andrew Newton wrote:

> This topic keeps appearing over and over again, so Marcos and I
> decided to address it.
> As it turns out, there's not much needed to achieve this. This draft
> suggests two new query parameters and re-uses the current RDAP domain
> query. In other words, its a very small addition to RDAP.
>
> -andy
>
>
> A new version of I-D, draft-newton-regext-rdap-domain-availability-00.txt
> has been successfully submitted by Andrew Lee Newton and posted to the
> IETF repository.
>
> Name: draft-newton-regext-rdap-domain-availability
> Revision: 00
> Title: Using RDAP as a Domain Availability Service
> Document date: 2016-12-16
> Group: Individual Submission
> Pages: 6
> URL:
> https://www.ietf.org/internet-drafts/draft-newton-regext-rdap-domain-availability-00.txt
> Status:
> https://datatracker.ietf.org/doc/draft-newton-regext-rdap-domain-availability/
> Htmlized:
> https://tools.ietf.org/html/draft-newton-regext-rdap-domain-availability-00
>
>
> Abstract:
>   This document describes a minimal profile of RDAP which can be used
>   to check the availability of domain names available for registration.
>
> _______________________________________________
> regext mailing list
> regext@ietf.org
> https://www.ietf.org/mailman/listinfo/regext

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