Add payload example using Webmention terms

[aaronpk]

Given that Webmention is a W3C REC, and that LDN already has an example of sending a Pingback payload, it seems appropriate to add an example using Webmention as well.

I think the Webmention example payload would look like the following, given the Webmention namespace document at https://www.w3.org/ns/webmention

{
  "@context": { "wm": "https://www.w3.org/ns/webmention" }
  "@id": "",
  "wm:source": { "@id": "http://example.net/reply" },
  "wm:target": { "@id": "http://example.org/article" }
}

[rhiaro]

I dunno, it seems unlikely that anyone looking at the LDN spec is going to straight up want to send webmentions as JSON. They might be looking if they want to bridge between LDN and Webmention, in which case this example is already in http://w3c-social.github.io/social-web-protocols/#ldn-to-wm

[csarven]

The Pingback example is not particularly interesting or useful either. Okay to remove that if need to.

There is a sufficient number and variety of examples in the spec in any case.

[melvincarvalho]

Commenting only on the syntax of the example.

Is this correct?

"@id": "",

I think in this case you would want to have a blank node meaning a message that doesnt have a specific URI. In this case you could leave out the @id completely:

{
  "@context": { "wm": "https://www.w3.org/ns/webmention" }
  "wm:source": { "@id": "http://example.net/reply" },
  "wm:target": { "@id": "http://example.org/article" }
}

OR to avoid a round trip of the context lookup

{
  "https://www.w3.org/ns/webmention#source": { "@id": "http://example.net/reply" },
  "https://www.w3.org/ns/webmention#target": { "@id": "http://example.org/article" }
}

Whether or not this example is included, I'd be interested to see the valid syntax on this, as it's something I raised before. Let me know if you think that's correct. :)

[rhiaro]

@melvincarvalho if you want to debate the syntax of the examples in the spec, please open a new issue. For the record, either is correct, and both result in different semantics (no @id = blank node, empty @id = relative URI, run it through the JSON-LD playground if you're still not sure).

[aaronpk]

Okay, the SWP already document covers this. It will be good to get an updated version of that published.