I have deeply mixed feelings about #ActivityPub's adoption of JSON-LD, as someone who's spent way too long dealing with it while building #Fedify.
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@hongminhee @julian I'm a true believer in RDF from back in the day, so I'm hardly neutral. But...
There are essentially no interesting ActivityPub extensions right now. Even Evan's chess example, no-one's actually using AP to play chess. It's just ActivityStreams + a few cute tricks now and then. Even if there were extensions, existing AP servers chop off and throw away data they don't understand. so none of these extensions could work.
I feel like most of the "WTF am I learning JSON-LD for" criticisms are coming from this status quo. That includes "if someone wants to add a gallery thing or whatever, can't they make a FEP?" The way things work now, your extension either a) works only in your software or b) has to be painfully negotiated with the whole community. We're all gonna have a big fight about it on this forum anyway. Let's not pretend JSON-LD helps us.
But if we add two things to the mix, the situation looks different. Those are 1. server software that "keeps all the bits", and 2. a whitelabel extensible app. That would make it very easy to spin up crazy new experiences for a sizeable existing userbase. Developers should not be forced to endure a FEP process, and they should not have to attract a userbase from nothing. They should be able to just build, without even worrying if they're stepping on toes. And of course, Fedify and libraries in other languages are a load-bearing part of that world, including enforcement of the JSON-LD rules.
That world does not exist at all today, but JSON-LD does, so it's pretty valid to describe this design as premature optimisation. I dunno though, we don't seem that far away.
@mat@friendica.exon.name that's a really interesting point of view, and has some parallels to how app development on the ATProto side is easier in many ways.
I do think that this is something C2S (aka the ActivityPub API) can enable.
I am critical of JSON-LD but I do certainly recognize I could be very wrong
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Do you know about the backgrounds of the immers project ?
, "no-one's actually using AP to play chess"
the reason that we have noa AP chess service _anymore_ is #uspol …This all feels very unfair somehow cause I know the backgrounds but anyway …
While we 2 days ago had a long thread about our use of Chess Games I will link the video from the thread https://digitalcourage.social/@sl007/116023149133783002immers with its federated locations and positional audio etc was supernice for playing chess !
Our use is fairly similar and straightforward like we did the chess Social CG meeting in 2018 and the rc3 (usually 18.000 people physically but here it was virtually cause pandemics) https://socialhub.activitypub.rocks/t/rc3-chaos-communication-congress/1202Maybe it would really be fair if people are new to look into the 20 years Social CG history where some volunteers really gave much work
🧵 1/2 -
@julian I don't know as much as I'd like about AT Lexicons. That is, not so much how they work, but what the grand idea is? I don't even understand if Bluesky imagines them being mixed and matched JSON-LD style. I think not?
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Do you know about the backgrounds of the immers project ?
, "no-one's actually using AP to play chess"
the reason that we have noa AP chess service _anymore_ is #uspol …This all feels very unfair somehow cause I know the backgrounds but anyway …
While we 2 days ago had a long thread about our use of Chess Games I will link the video from the thread https://digitalcourage.social/@sl007/116023149133783002immers with its federated locations and positional audio etc was supernice for playing chess !
Our use is fairly similar and straightforward like we did the chess Social CG meeting in 2018 and the rc3 (usually 18.000 people physically but here it was virtually cause pandemics) https://socialhub.activitypub.rocks/t/rc3-chaos-communication-congress/1202Maybe it would really be fair if people are new to look into the 20 years Social CG history where some volunteers really gave much work
🧵 1/2We implemented this standard and you can create / describe your rooms [Place, `redaktor:fictional`] and the chessboard is just a geohash as described in the geosocial CG so the use is the same, just `redaktor:fictional` too,
You load the Collection of Chessfigures (pawn1 ...) can name them, they `Travel` over the chessboard ant the `Arrive` describes the `result`.
As always you can get very detailed with wikidata properties and entities but bare AS Vocabulary is enough.
In the end you have a Collection for the Travels which is your played game which you can replay or do whatever with.But you can still install immers - it is worth a try https://github.com/immers-space
The reason for its end are the same as for the gup.pe groups and I hope people konw about it …
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> while linked data cultists harass developers about nonresolvable URLs
@silverpill I don't consider myself a cultist but I still think that putting invalid URLs in any payload where they are supposed to be meaningful is disrespectful towards anyone that consumes your API. Please don't do that.
@mariusor @hongminhee The
@contextis not supposed to be required in the first place, but here we are adding it to every activity and wasting bandwidth because Mastodon developers didn't read the spec. -
We implemented this standard and you can create / describe your rooms [Place, `redaktor:fictional`] and the chessboard is just a geohash as described in the geosocial CG so the use is the same, just `redaktor:fictional` too,
You load the Collection of Chessfigures (pawn1 ...) can name them, they `Travel` over the chessboard ant the `Arrive` describes the `result`.
As always you can get very detailed with wikidata properties and entities but bare AS Vocabulary is enough.
In the end you have a Collection for the Travels which is your played game which you can replay or do whatever with.But you can still install immers - it is worth a try https://github.com/immers-space
The reason for its end are the same as for the gup.pe groups and I hope people konw about it …
@sl007 @julian I admit I didn't pay attention to immers at the time - I don't play games, not even chess. I was just using chess as an example, didn't mean to trigger anyone's trauma!
Still, it kinda proves my point. You have to use standard AS vocabulary because Mastodon, and if you squint then sure,
TravelandArrive, why not? But given some of the conversations I've seen on this forum, I shudder to think how that would go down if you tried to get approval for that usage from "the community" first. -
@sl007 @julian I admit I didn't pay attention to immers at the time - I don't play games, not even chess. I was just using chess as an example, didn't mean to trigger anyone's trauma!
Still, it kinda proves my point. You have to use standard AS vocabulary because Mastodon, and if you squint then sure,
TravelandArrive, why not? But given some of the conversations I've seen on this forum, I shudder to think how that would go down if you tried to get approval for that usage from "the community" first.@mat Has a reason, just wrote it to @julian in a DM, just didn't want to post public.
Not sure if you visited the link. This _was_ the community approval …
Immers was famous and we had some official Social CG meetings where I linked one where thousands of community people attended (?)
The W3C Social CG _is_ the Community (?)
Meanwhile even Public Spaces Incubator uses it which is to my best knowledge the largest upcoming iimplementor by far.
I mean apart from that it is pretty obvious after the meeting where we talked about "factual" vs "fictional".
mastodon has nothing to do with this. The majority of projects count in a democracy. We had a demo playing chess between 4 softwares.Doing the official AP Conf and becoming elected Policy Lead, I had always asked the community. For 20 years
https://conf.tube/c/apconf_channel/videosNot sure if anyone did read the "Conformance Section" of ActivityPub. https://www.w3.org/TR/activitypub/#conformance
It is section 2 - You have to support "The Entirety"...
If mastodon does not it is not ActivityPub. -
@hongminhee @jalefkowit huh. I’ve been pondering using it for some projects of mine, so this is good to know.
Is it a fundamental problem with JSON-LD, such that it should just be avoided, or a problem with how ActivityPub uses it?
And is there something else you’d recommend that fulfills the same goals?
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@sl007 @julian I admit I didn't pay attention to immers at the time - I don't play games, not even chess. I was just using chess as an example, didn't mean to trigger anyone's trauma!
Still, it kinda proves my point. You have to use standard AS vocabulary because Mastodon, and if you squint then sure,
TravelandArrive, why not? But given some of the conversations I've seen on this forum, I shudder to think how that would go down if you tried to get approval for that usage from "the community" first.@mat
Just btw, this is 7 years old https://www.reddit.com/r/chess/comments/94ubnd/chess_over_activitypub/ but anywayHowever, given that I have, including immers and redaktor, at least 3 apps where I can use the first chess spec.:
if more than 2 implementations will also support this second chess specification, I will do so too. -
@hongminhee @jalefkowit huh. I’ve been pondering using it for some projects of mine, so this is good to know.
Is it a fundamental problem with JSON-LD, such that it should just be avoided, or a problem with how ActivityPub uses it?
And is there something else you’d recommend that fulfills the same goals?
@lkanies@hachyderm.io @jalefkowit@vmst.io To be honest, I'm not too sure myself. I just know that JSON-LD was originally planned as a foundation for the Semantic Web. I can only guess that if ontology is useful in a certain area, then JSON-LD would probably be useful there too.
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@hongminhee do you use the activitystrea.ms module from npm? It takes a lot of the pain out.
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@hongminhee I agree that new developers should use a JSON-LD processor. It saves a lot of heartache.
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@hongminhee do you use the activitystrea.ms module from npm? It takes a lot of the pain out.
@evan@cosocial.ca I don't remember exactly, but I think I came across it while doing research before developing Fedify. I probably didn't use it because the TypeScript type definitions were missing. In the end, I ended up making something similar in Fedify anyway.
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@mariusor @hongminhee The
@contextis not supposed to be required in the first place, but here we are adding it to every activity and wasting bandwidth because Mastodon developers didn't read the spec.@silverpill I'm sorry, I'm not aware of that and I thought I read the specs pretty thoroughly. Could you point me in the right direction for where you got this information from?
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@hongminhee I have the same feeling. The idea behind JSON-LD is nice, but it isn't widely available, so developing with it becomes a headache: do I want to create a JSON-LD processor, spending twice the time I wanted to, or do I just consider it as JSON for now and hope someone will make a JSON-LD processor soon? Often, the answer is the latter, because it's a big task that we're not looking for when creating fedi software.
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@silverpill I'm sorry, I'm not aware of that and I thought I read the specs pretty thoroughly. Could you point me in the right direction for where you got this information from?
@contextis a recommendation, not a requirement.ActivityPub:
ActivityPub
The ActivityPub protocol is a decentralized social networking protocol based upon the [ActivityStreams] 2.0 data format. It provides a client to server API for creating, updating and deleting content, as well as a federated server to server API for delivering notifications and content.
(www.w3.org)
Implementers SHOULD include the ActivityPub context in their object definitions.
ActivityStreams:
Implementations producing Activity Streams 2.0 documents SHOULD include a @context property with a value that includes a reference to the normative Activity Streams 2.0 JSON-LD @context definition using the URL " https://www.w3.org/ns/activitystreams".
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@contextis a recommendation, not a requirement.ActivityPub:
ActivityPub
The ActivityPub protocol is a decentralized social networking protocol based upon the [ActivityStreams] 2.0 data format. It provides a client to server API for creating, updating and deleting content, as well as a federated server to server API for delivering notifications and content.
(www.w3.org)
Implementers SHOULD include the ActivityPub context in their object definitions.
ActivityStreams:
Implementations producing Activity Streams 2.0 documents SHOULD include a @context property with a value that includes a reference to the normative Activity Streams 2.0 JSON-LD @context definition using the URL " https://www.w3.org/ns/activitystreams".
@silverpill aaah, I see. I think we've had this discussion before (or at least I had it with someone else).
For me "SHOULD" falls in the category of the robustness principle: "be conservative in what you do, be liberal in what you accept from others".
So for me if you treat "SHOULD" in a spec as non mandatory you haven't really implemented the spec.
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@silverpill aaah, I see. I think we've had this discussion before (or at least I had it with someone else).
For me "SHOULD" falls in the category of the robustness principle: "be conservative in what you do, be liberal in what you accept from others".
So for me if you treat "SHOULD" in a spec as non mandatory you haven't really implemented the spec.
@mariusor I don't remember having such discussion. The SHOULD keyword is defined in RFC-2119:
This word, or the adjective "RECOMMENDED", mean that there may exist valid reasons in particular circumstances to ignore a particular item, but the full implications must be understood and carefully weighed before choosing a different course.
There are many valid reasons to not include
@context. We also have almost 10 years of implementation experience and by now full implications are very well understood: by ignoring this recommendation we make messages smaller and developer experience better. No downside at all. -
@mariusor I don't remember having such discussion. The SHOULD keyword is defined in RFC-2119:
This word, or the adjective "RECOMMENDED", mean that there may exist valid reasons in particular circumstances to ignore a particular item, but the full implications must be understood and carefully weighed before choosing a different course.
There are many valid reasons to not include
@context. We also have almost 10 years of implementation experience and by now full implications are very well understood: by ignoring this recommendation we make messages smaller and developer experience better. No downside at all.@silverpill regarding size, ActivityPub is such a verbose protocol that the hundred or so of raw bytes you save through omitting context, are most likely negligible through the prism of connection compression. So to me that's not entirely a "valid reason".
And as developer myself, I think that contexts, even in a non valid JSON-LD implementation, offer enough guidance for building a data vocabulary for them to have plenty of value.
Do you propose we replace contexts with Open API specifications, or how do we coordinate what's a valid vocabulary data object in a federated network? And how do you propose that others discover these specs?
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@pintoch read this thread?
