Re: [netconf] [yang-doctors] Yangdoctors last call review of draft-ietf-netconf-subscribed-notifications-21
Martin Bjorklund <mbj@tail-f.com> Mon, 21 January 2019 09:49 UTC
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Date: Mon, 21 Jan 2019 10:49:51 +0100
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Cc: evoit@cisco.com, yang-doctors@ietf.org, netconf@ietf.org, draft-ietf-netconf-subscribed-notifications.all@ietf.org
From: Martin Bjorklund <mbj@tail-f.com>
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Subject: Re: [netconf] [yang-doctors] Yangdoctors last call review of draft-ietf-netconf-subscribed-notifications-21
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Andy Bierman <andy@yumaworks.com> wrote: > On Wed, Jan 16, 2019 at 10:35 AM Eric Voit (evoit) <evoit@cisco.com> wrote: > > > Hi Andy, > > > > Thanks for the review. Some thoughts.... > > > > > From: Andy Bierman, January 14, 2019 8:08 PM [...] > > > I7) leaf stream-xpath-filter: [multiple uses] > > > > > > The expression is evaluated in the following XPath context: > > > > > > o The set of namespace declarations is the set of prefix > > > and namespace pairs for all YANG modules implemented > > > by the server, where the prefix is the YANG module > > > name and the namespace is as defined by the > > > 'namespace' statement in the YANG module. > > > > > > -- This prefix processing is not done anywhere else in NETCONF > > > or RESTCONF. IMO a bad precedent. Only the XML prefixes > > > should be required for processing of XML encoding. YANG > > > module prefixes are not required to be unique, unlike > > > the prefix mappings in XML > > > > This text was proposed by Martin as a result of the "xpath expressions in > > JSON" thread last October in NETMOD. > > > > I am happy to incorporate whatever text is appropriate. I was hoping that > > the suggested text was sufficient for now. Kent has already incorporated > > this as an issue for yang-next > > https://github.com/netmod-wg/yang-next/issues/55 > > So hopefully there is no final precedent being claimed. > > > > > I do not agree that this YANG module should define a new way to encode XPath > into XML instance documents. This mechanism was first used in RFC 8040, section 4.8.4, in order to have a transport-agnostic encoding of XPath expressions (same for XML and JSON). There was long debate on the ML for this issue, and this was the outcome that the WG decided. > This will require significant changes to server > implementations. YANG module prefixes are not even required to be unique > so the set of prefixes used by the server in XML instance documents may be > different, > since it must be unique. YANG module prefixes are not used here. The module *name* is used as the identifier prefix in XPath expressions: /ietf-interfaces:interfaces/ietf-interfaces:interface/... /martin
- [Netconf] Yangdoctors last call review of draft-i… Andy Bierman
- Re: [Netconf] Yangdoctors last call review of dra… Eric Voit (evoit)
- Re: [Netconf] Yangdoctors last call review of dra… Andy Bierman
- Re: [netconf] Yangdoctors last call review of dra… Eric Voit (evoit)
- Re: [netconf] Yangdoctors last call review of dra… Mehmet Ersue
- Re: [netconf] Yangdoctors last call review of dra… Andy Bierman
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Martin Bjorklund
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Andy Bierman
- Re: [netconf] Yangdoctors last call review of dra… Andy Bierman
- Re: [netconf] Yangdoctors last call review of dra… Eric Voit (evoit)
- Re: [netconf] Yangdoctors last call review of dra… Andy Bierman
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Martin Bjorklund
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Andy Bierman
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Martin Bjorklund
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Martin Bjorklund
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Martin Bjorklund
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Andy Bierman
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Martin Bjorklund
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Andy Bierman
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Martin Bjorklund
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Martin Bjorklund
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Per Hedeland
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Per Hedeland
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)
- Re: [netconf] [yang-doctors] Yangdoctors last cal… Eric Voit (evoit)