You (and the people in those issues including Gargron) are confusing contexts URLs and namespaces. "@context":[{"toot":"http://joinmastodon.org/ns# http://joinm

You (and the people in those issues including Gargron) are confusing contexts URLs and namespaces. "@context":[{"toot":"http://joinmastodon.org/ns# http://joinmastodon.org/ns#"}] defines a "toot" prefix for the http://joinmastodon.org/ns# http://joinmastodon.org/ns# namespace and namespaces don't have to resolve to anything. "@context":["http://joinmastodon.org/ns# http://joinmastodon.org/ns#"] would be incorrect, but that's not what Mastodon does. Some of the namespaces used by the JSON-LD spec itself (https://www.w3.org/TR/json-ld11/#conformance https://www.w3.org/TR/json-ld11/#conformance) don't resolve either. For example: $ curl -X GET -H "Accept:application/ld+json" https://www.w3.org/ns/prov -L <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>406 Not Acceptable</title> EDIT: it seems the source of the misunderstanding in the issue you linked is that GoToSocial used to send "@context": ["http://joinmastodon.org/ns http://joinmastodon.org/ns", ...], ie. using it as a context URL instead of a namespace: https://github.com/friendica/friendica/issues/10740#issuecomment-924474840 https://github.com/friendica/friendica/issues/10740#issuecom...