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

On Tue, May 23, 2017 at 5:30 AM, Randy Armstrong <
randy.armstrong@opcfoundation.org> 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.
>
>
> Would you mind identify which URN nid you are using?  I did not see one
listed here:

https://www.iana.org/assignments/urn-namespaces/urn-namespaces.xhtml#urn-namespaces-1

that was obvious.

regards,

Ted

> 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.
>
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> ------------------------------
> *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
> >
>
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