[netmod] xpath expressions in JSON

Martin Bjorklund <mbj@tail-f.com> Wed, 10 October 2018 11:16 UTC

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Date: Wed, 10 Oct 2018 13:16:10 +0200 (CEST)
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From: Martin Bjorklund <mbj@tail-f.com>
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Subject: [netmod] xpath expressions in JSON
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Hi,

While reviewing restconf-notif, I saw this example:

   {
      "ietf-subscribed-notifications:input": {
         "stream": "NETCONF",
         "stream-xpath-filter": "/ds:foo/",
         "dscp": "10"
      }
   }

Note the "stream-xpath-filter".  It has a prefix in the XPath string.
How are prefixes declared when JSON is used?

The leaf "stream-xpath-filter" says:

              o  The set of namespace declarations are those in scope on
                 the 'stream-xpath-filter' leaf element.

(I think I provided that text...)

This assumes that the encoding is XML, or at leas that the encoding
can somehow transfer namespace declarations.

How is this supposed to work with JSON?


/martin