<![CDATA[On Tags (including Hash-Tags) in ActivityPub.]]>On Tags (including Hash-Tags) in ActivityPub.

1/

I think new developers coming to ActivityPub want to write something like:

"tag": ["apple", "banana", "cherry"]

It is unfortunate that that isn't valid ActivityPub. But, that it must instead be:

"tag": [
{
"type": "Hashtag",
"name": "#apple"
},
{
"type": "Hashtag",
"name": "#banana"
},
{
"type": "Hashtag",
"name": "#cherry"
}
]

...

]]>https://board.circlewithadot.net/topic/7f86cb3f-6df9-49f1-a9f6-845cf327716d/on-tags-including-hash-tags-in-activitypub.RSS for NodeMon, 25 May 2026 12:38:38 GMTTue, 19 May 2026 17:22:02 GMT60<![CDATA[Reply to On Tags (including Hash-Tags) in ActivityPub. on Wed, 20 May 2026 15:14:16 GMT]]>@reiver@mastodon.social hmm, I don't much mind the "type": "Hashtag" bit. Additional specificity is helpful in the long-run I think.

For example, tag contains hashtags, but it also contains mentions, "type": "Mention", so that actually makes sense.

Additional stuff that falls under the rather general name "tag" could also fit. Tagging a location, tagging an Event, etc.

This might also be what @evan was talking about, I didn't click through his link yet <img class="not-responsive emoji" src="https://activitypub.space/assets/plugins/nodebb-plugin-emoji/emoji/android/1f61c.png?v=f187f9278b7" title="😜" />

]]>https://board.circlewithadot.net/post/https://activitypub.space/post/1917https://board.circlewithadot.net/post/https://activitypub.space/post/1917Wed, 20 May 2026 15:14:16 GMT<![CDATA[Reply to On Tags (including Hash-Tags) in ActivityPub. on Wed, 20 May 2026 15:01:37 GMT]]>There's a definition for Hashtag here:

ActivityPub Miscellaneous Terms

favicon

(swicg.github.io)

]]>https://board.circlewithadot.net/post/https://activitypub.space/post/1915https://board.circlewithadot.net/post/https://activitypub.space/post/1915Wed, 20 May 2026 15:01:37 GMT<![CDATA[Reply to On Tags (including Hash-Tags) in ActivityPub. on Tue, 19 May 2026 17:28:15 GMT]]> i don't mind type but the leading hash always feels redundant

]]>https://board.circlewithadot.net/post/https://epiktistes.com/objects/KYbr_iOBHtkhttps://board.circlewithadot.net/post/https://epiktistes.com/objects/KYbr_iOBHtkTue, 19 May 2026 17:28:15 GMT<![CDATA[Reply to On Tags (including Hash-Tags) in ActivityPub. on Tue, 19 May 2026 17:27:27 GMT]]>On Tags (including Hash-Tags) in ActivityPub.

2/

A new version of ActivityPub could extend the type of "tag" from:

Object | Link

to:

Object | Link | xsd:string

And that would make the following valid ActivityPub:

"tag": ["apple", "banana", "cherry"]

Of course, it would have to be specified how to interpret this. (Ex: as "type":"Hashtag", or whatever.)

]]>https://board.circlewithadot.net/post/https://mastodon.social/users/reiver/statuses/116602414540772845https://board.circlewithadot.net/post/https://mastodon.social/users/reiver/statuses/116602414540772845Tue, 19 May 2026 17:27:27 GMT