Re: [Uri-review] [IANA #1273521] Registration request for "at" URI scheme

[Dave Thaler <[e-mail]>]

In my opinion it would be helpful to include a Note since this registration
doesn't follow the "SHOULD" (which is ok since its not a MUST) in RFC 7595:
"   Schemes SHOULD NOT use names that are either very general purpose or
   associated in the community with some other application or protocol."

since "at", is a well known (e.g., see https://linux.die.net/man/1/atapplication, https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/at, etc.) application for scheduling job execution.

It would be helpful to acknowledge this to avoid confusion.

Dave

> -----Original Message-----
> From: Uri-review <[e-mail]> On Behalf Of Sabrina
> Tanamal via RT
> Sent: Thursday, June 1, 2023 3:11 PM
> To: [e-mail]
> Cc: [e-mail]; [e-mail]; [e-mail]
> Subject: [Uri-review] [IANA #1273521] Registration request for "at" URI
> scheme
> 
> Hi Bryan,
> 
> We've added provisional URI scheme "at" to the registry:
> 
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww
> .iana.org%2Fassignments%2Furi-
> schemes%2Fprov%2Fat&data=05%7C01%7Cdthaler%40microsoft.com%7C5c
> d0ba6ded124e27b2c808db62ee7a09%7C72f988bf86f141af91ab2d7cd011db4
> 7%7C1%7C0%7C638212548627735427%7CUnknown%7CTWFpbGZsb3d8eyJW
> IjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C
> 3000%7C%7C%7C&sdata=bH2DZ3sW6LB5SmnkVX4eQwmeGglFZIvI5Vfce2bYK
> hg%3D&reserved=0
> 
> Registry:
> https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww
> .iana.org%2Fassignments%2Furi-
> schemes&data=05%7C01%7Cdthaler%40microsoft.com%7C5cd0ba6ded124e
> 27b2c808db62ee7a09%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7
> C638212548627735427%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAw
> MDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C
> %7C&sdata=tDZycvdw47j5MoV4JNtv%2FL%2BjPmvMK4dP9xSn34giwtQ%3D&
> reserved=0
> 
> Per the designated expert for URI Schemes registry, we're also notifying the
> [e-mail] mailing list that this provisional registration has been
> completed.
> 
> Best regards,
> 
> Sabrina Tanamal
> Lead IANA Services Specialist
> 
> On Fri May 26 02:27:30 2023, [e-mail] wrote:
> >
> > [sending from personal email to avoid delivery problems]
> >
> > Hi Folks!
> >
> > We are requesting a provisional registration of the "at" URI scheme,
> > for use with the AT Protocol (atproto.com). Details are listed below.
> >
> > We do expect to add some additional constraints and small tweaks
> > before formalizing the entire protocol, but we will maintain
> > compatibility with existing URIs, and it seems prudent to register
> > provisionally at this time.
> >
> > This scheme has been discussed on the [e-mail] mailing
> > list, and some small changes to the (provisional) registration
> > document have been made.
> >
> > ------
> >
> > URI scheme name: at
> >
> > Status: provisional
> >
> > URI scheme syntax:
> >     at://<authority>
> >     at://<authority>/<collection>
> >     at://<authority>/<collection>/<record-key>
> >
> >     "authority" may be a "handle" (hostname) or a W3C DID
> >
> > Examples:
> >     at://user.example.com
> >     at://did:plc:24ybard66vv44zksje25o7dz
> >
> > at://did:plc:24ybard66vv44zksje25o7dz/app.bsky.feed.post/3jwdwj2ctlk25
> >
> > URI scheme semantics:
> >      Reference a repository, collection, or record in the
> > Authenticated Transfer Protocol (AT Protocol)
> >      The "authority" part references an account identity, which is not
> > necessarily the network host where the indicated resource can be
> > found.
> >
> > Encoding considerations:
> >      All current supported use-cases of AT-URI can be met with the
> > ASCII subset of UTF-8 (Unicode)
> >
> > Applications/protocols that use this URI scheme name:
> >      The Bluesky social network
> >
> (https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbsk
> >
> y.app%2F&data=05%7C01%7Cdthaler%40microsoft.com%7C5cd0ba6ded124
> e27b2c8
> >
> 08db62ee7a09%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6382
> 12548627
> >
> 735427%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2
> luMzIiLCJ
> >
> BTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=m9kdC8R1fA
> wghnm2ar3U
> > Ij%2FylobxNzE3nKoMoBlt3KI%3D&reserved=0), running on top of AT
> > Protocol
> >
> > Interoperability considerations:
> >      The use of DID of the "authority" section, with multiple un-
> > encoded  colon characters (":"), precludes direct compatibility with
> > the WHATWG URL standard.
> >
> > Security considerations:
> >     Unknown, use with care
> >
> > Contact:
> >     - Bryan Newbold <[e-mail]>
> >
> > Change controller:
> >     - Bluesky PBLLC
> >     - Paul Frazee <[e-mail]>
> >
> > References:
> >     - "AT Protocol Overview"
> >
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fatp
> >
> roto.com%2Fguides%2Foverview&data=05%7C01%7Cdthaler%40microsoft.co
> m%7C
> >
> 5cd0ba6ded124e27b2c808db62ee7a09%7C72f988bf86f141af91ab2d7cd011d
> b47%7C
> >
> 1%7C0%7C638212548627735427%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiM
> C4wLjAwMDA
> >
> iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&
> sdata=
> >
> HKJtvnjpYFB4WGW28N1OofaPqrqBqnta6OZV52%2BSEAU%3D&reserved=0>
> >     - "ATP URI Scheme"
> >
> <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fatp
> > roto.com%2Fspecs%2Fat-uri-
> scheme&data=05%7C01%7Cdthaler%40microsoft.co
> >
> m%7C5cd0ba6ded124e27b2c808db62ee7a09%7C72f988bf86f141af91ab2d7c
> d011db4
> >
> 7%7C1%7C0%7C638212548627735427%7CUnknown%7CTWFpbGZsb3d8eyJW
> IjoiMC4wLjA
> >
> wMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7
> C%7C&sd
> >
> ata=mXbMwPUgdzhpT8peQu%2BsLVKa7rq3U1j%2BJD%2BaynLL1zQ%3D&res
> erved=0>
> 
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> DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7
> C&sdata=gHRQrOAkm1bFXmZbGDOcOafq2qDZQYaRHwaJHl7QuaM%3D&res
> erved=0