Re: [Uri-review] Request for URI schemes assigned to OPC UA

On 23/05/2017 13:30, Randy Armstrong wrote:
> 1) We use the schemes for URLs that identify multiple network paths to a single resource which is identified with a URI that uses the 'urn' scheme. It is not clear to me that registration is required for this usage. Please advise.
>

The URN as identifier seems reasonable enough.  I would suggest provisional 
registration for the "network path" schemes, which seems more appropriate for these.

As far as I can tell from the registration template, your URI "network path" 
schemes would not be used in the open Web, and as such would not be used 
publicly in the Web as identifiers.

>
> 2) The specs is an IEC specification as well (see https://webstore.iec.ch/publication/21993 ). In addition, the text quoted is old. Anyone can download the specifications from the OPC Foundation website today.

It would help, then, to include a direct link to the publicly downloadable 
specification in the registration template.

#g
--

>
>
> ________________________________
> From: Graham Klyne <gk@ninebynine.org>
> Sent: Tuesday, May 23, 2017 2:07:11 AM
> To: Randy Armstrong; uri-review@ietf.org
> Cc: TCB
> Subject: Re: [Uri-review] Request for URI schemes assigned to OPC UA
>
> I have two objections here to permanent registration:
>
> 1. The specifications appear to be non-open "Note: Access to specifications and
> developer resources are available to OPC Foundation members only."
>
> 2. The use of multiple URI schemes to access the same resource goes against
> principles of web architecture [http://www.w3.org/TR/webarch/#uri-aliases].
>
> This topic has been discussed previously on this list: see thread at [1].
>
> [1]
> https://mailarchive.ietf.org/arch/search/?email_list=uri-review&gbt=1&index=ze2I30iloSGZxlP2vAeCWcPOWus
>
> #g
> --
>
>
>
> On 22/05/2017 22:04, Randy Armstrong wrote:
>> Scheme name:
>>
>> opc.tcp       :  OPC UA Connection Protocol over TCP/IP
>> opc.amqp  :  OPC UA Connection Protocol over AMQP
>> opc.wss      :  OPC UA Connection Protocol over WebSockets
>>
>> We expect to add new schemes as time goes on.
>>
>> Status:  permanent
>>
>> Applications/protocols that use this scheme name:
>>
>> Applications which implement the OPC UA Connection Protocol defined by the OPC Unified Architecture specification:
>> https://opcfoundation.org/developer-tools/specifications-unified-architecture
>>
>> The opc.tcp scheme has been in use in the field for about 10 years (we were unaware of the registration process).
>> Note that the OPC Foundation has a trademark on the term "OPC" (see US Trademark #78732560)
>>
>> Contact:
>> Randy Armstrong
>> tcb@opcfoundation.org
>>
>> Change controller:
>> OPC Foundation
>> https://opcfoundation.org/
>>
>> References:
>> The protocols and schemes are defined in Part 6: Mappings:
>> http://www.opcfoundation.org/UA/Part6/
>>
>> _______________________________________________
>> Uri-review mailing list
>> Uri-review@ietf.org
>> https://www.ietf.org/mailman/listinfo/uri-review
>>
>