Gordon asked about a meta tag that defines a blogs comments.
This is already used as an example in the proposal using at:alternate, but it assumes the canonical record of the web page is a standard.site document to contextualize it. And there can be blogs that are not on standard.site and linking/embedding to a AT record for comment.
Here I propose a custom property for blog comments as at:blog:comments.
Is this what @gordon.bsky.social is asking?
Gordon I think you want a canonical way to have a bsky post as a comment / webmention?
Concretely constellation provides this as a shared community service https://www.microcosm.blue/
Other long form references a “share post” and interactions on it.
Chris can you give an example of where this would be used and why?