Response Type: move "reply" to 2nd to last to enable p-summary fallback use-cases

[tantek]

Based on implementer feedback from @aaronpk and @sebsel, it may make more sense to move the "reply" recognition step to 2nd to last in the Response Type Algorithm, that is, right before the "else it is a mention".

Specifically, anyone posting a "like", "repost", "RSVP", (or any other new response type!) has incentive to provide u-in-reply-to fallback plain text equivalent perhaps in p-summary that expresses the reaction/response as prose, e.g.:

• like: "Tantek liked this post"
• repost: "Tantek reposted this at URL"
• tag-of: "Tantek tagged Sebastian in this photo"

This way even if the receiving site only supports receiving Webmention replies/comments, something sensible will still show up, and provide a good experience to the author of the response, the author of the post, and any readers of the post.

If we formalize this kind of fallback markup as a publishing guideline (perhaps a feature request for https://github.com/microformats/h-entry) it also provides a nice path forward for expanding response types over time that provide meaningful behavior even to existing systems without explicit support for the new response types.

[prtksxna]

You'll have to help me understand this a bit better. Are you saying that newer kinds of replies, for example edits, should also include the u-in-reply-to class along with their own class (u-edit-of in this case) so that the author of the post can at least show it as a reply (if reply becomes the 2^nd to last step)?

[tantek]

@prtksxna precisely! All (especially newer) responses should include the u-in-reply-to to enable fallback behavior with p-summary with any consuming code that may or may not understand that particular type of response.

[tantek]

Discussed in https://www.w3.org/wiki/Socialwg/2017-07-25-minutes#Post_Type_Discovery today's Social Web WG telecon, with resolution of accepting editor proposal, and approving new WD with that change.

[prtksxna]

Great! Thanks for the logs.

[tantek]

Changes made in repo and published updated WD: https://www.w3.org/TR/2017/WD-post-type-discovery-20170801/