Re: [netmod] yang-json document

Phil Shafer <phil@juniper.net> writes:

> Andy Bierman writes:
>>> So how would you encode an arbitrary XML snippet (which is what anyxml
>>> is) in JSON?  I know you want to restrict anyxml, but that is simply
>>> not how it is defined in 6020.  For now we have to live with that.
>>
>>No -- the description-stmts for the anyxml nodes in YANG Patch
>>specify the limitations and an implementation of ietf-yang-patch
>>MUST support what it says.  If other individual YANG modules
>>want to constrain anyxml in specific ways, they can do that.
>>We can specify what an implementation of a particular module MUST
>>accept.
>
> Doesn't this mean that yang-patch is not compatible with
> yang, since one can define models in yang that yang-patch
> will not handle?
>
>>XML has simple nodes which are empty and those which are not empty.
>>  XML non-empty simple node <-->  JSON string
>>  XML empty node <--> JSON null
>>  XML complex node <--> JSON object
>
> This is an extreme oversimplification.  Consider the real-world
> case:
>
>     anyxml web-banner {
>         description "Chunk of XHTML that is placed at the
>                 top of every page for the embedded web server";
>     }
>
>     <web-banner>
>         <p>This is <em>very</em> sensitive data </p>
>         <img src="mister-yuk.png"/>
>         <p>I'm serious, dude</p>
>     </web-banner>
>
> What does the JSON for this look like?  I think the only viable
> answer is:
>
>     "web-banner": "<p>This is <em>very</em> sensitive data </p>\n<img
>     src="mister-yuk.png"/>\n<p>I'm serious, dude</p>\n"

I don't think so, the following is IMO a much better option:

    "web-banner":
      "This is *very sensitive* data.

       ![](mister-yuk.png)

       I'm serious, dude"

To be able to do this, it should be sufficient that the description of
the "web-banner" anyxml node states that HTML has to be used in XML
encoding and markdown in JSON.

Note that the -00 version of the draft contained a very similar example:

http://tools.ietf.org/html/draft-ietf-netmod-yang-json-00#section-3.2.5

Lada

>
> Thanks,
>  Phil
>
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Ladislav Lhotka, CZ.NIC Labs
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