Re: The OWL file

On Fri, 21 Mar 2025 at 10:41, Cristiano Longo <
cristianolongo@opendatahacklab.org> wrote:

> We were just discussing about the effort needed to encode in OWL the
> semantics described in natural language of ActivityStreams2, in particular
> those in https://www.w3.org/TR/activitystreams-vocabulary/
>
Cristiano,

The current AS2 OWL specs are not that complex and already exist. I have
even used the most complete one to generate a typescript skeleton. Don't
quote me on this but semantically it is not that rich and not that large
and does not capture the semantics that a JSON-LD implementation would
provide IIRC. The recent triage work on the AS2 spec github issues may well
provide a newer picture but as I say I dont know about capturing the
semantics using OWL, but yes this should be investigated maybe talking to
Evan and then doing an initial few hours worth of investigation may shed
more light on this area before embarking on a semi major project that might
not result in real term usable results.\

Regards,

Aaron

>
> On 20/03/25 22:38, Aaron Gray wrote:
>
> What are you actually trying to describe ? Sorry I have lost the thread as
> everyone is top posting.
>
> On Thu, 20 Mar 2025 at 19:06, Cristiano Longo <
> cristianolongo@opendatahacklab.org> wrote:
>
>> It depends on how much one intend to go in deep. For example, I already
>> produced some constraints that describe membership and paging of
>> collection, but I have been unable to envisage a model theoretic semantics
>> for the activity ADD and REMOVE as it would require to represent the time
>> ordering of activity of this type.
>> On 20/03/25 19:51, Melvin Carvalho wrote:
>>
>>
>>
>> čt 20. 3. 2025 v 19:39 odesílatel Cristiano Longo <
>> cristianolongo@opendatahacklab.org> napsal:
>>
>>> Thank you very much, I fond this that is really specific
>>>
>>> https://nlnet.nl/opensocial/
>>>
>>> However just 50K euro will be funded, so that just one or two person
>>> would be involved.
>>>
>>> Now I have to understand if, in the case I got this grant, how I should
>>> interact with the official Activity Pub charter.
>>>
>>> However, on monday I'll have a meeting at my university to discuss about
>>> this grant and other opportunities.
>>>
>>
>> Unsure making an OWL file would be alot of effort.  I would imagine a
>> perfect professional document costing in the range of 5k, and could be done
>> in a few weeks.
>>
>>
>>> CL
>>> On 18/03/25 09:53, Melvin Carvalho wrote:
>>>
>>>
>>>
>>> út 18. 3. 2025 v 9:27 odesílatel Cristiano Longo <
>>> cristianolongo@opendatahacklab.org> napsal:
>>>
>>>> I'm going to look for any funding for this. Any suggestion about an
>>>> appropriate funding source and scheme will be appreciated. Also, proposals
>>>> for collaborations with other institutions are welcome.
>>>>
>>>
>>> I would recommend NLNet, they are very generous with funding:
>>>
>>> https://nlnet.nl/propose/
>>>
>>>
>>>> CL
>>>> On 04/10/24 10:11, Melvin Carvalho wrote:
>>>>
>>>>
>>>>
>>>> pá 4. 10. 2024 v 10:03 odesílatel Cristiano Longo <
>>>> cristianolongo@opendatahacklab.org> napsal:
>>>>
>>>>> The OWL file have to be mantained and enriched, as reported in
>>>>> https://lists.w3.org/Archives/Public/public-swicg/2023Dec/0014.html
>>>>>
>>>>> I don't know if it is appropriate that the community group work on
>>>>> this.
>>>>> And, if so, I'm not sure if this should be mentioned in the document
>>>>> under discussion or it could emerge later as a work item.
>>>>>
>>>>> I'm sorry but I cannot attend the today meeting.
>>>>>
>>>>
>>>>
>>>> It’s the machine-readable vocabulary for ActivityPub. Could we perhaps
>>>> just call it the *Schema*, *Vocab*, or *Ontology* for ActivityPub,
>>>> instead of "OWL"? OWL stands for Ontology Web Language, and that’s a bit
>>>> less intuitive for most folks.
>>>>
>>>> In the linked data world, a schema is essential, and it should be
>>>> referenced in the context. The context itself isn’t meant for
>>>> definitions—it’s more of an intermediary between the specific JSON format
>>>> (or "profile") and the schema.
>>>>
>>>> There was quite a bit of work done on the schema during the Working
>>>> Group, but at some point, the link to it seems to have been
>>>> broken—intentionally or not. I think it would be a valuable task to restore
>>>> that connection and make the ActivityPub schema fully compliant with W3C
>>>> standards again.
>>>>
>>>>>
>>>>> CL
>>>>>
>>>>> On 08/12/23 17:38, Evan Prodromou wrote:
>>>>> > The original development file for AS2 was an OWL file.
>>>>> >
>>>>> > I don't think it was ever edited after James Snell created the first
>>>>> > JSON-LD context file.
>>>>> >
>>>>> > But it's been in the Activity Streams 2.0 repository on GitHub since
>>>>> > it was created.
>>>>> >
>>>>> > We get occasional requests to make changes to it to bring it into
>>>>> line
>>>>> > with the JSON-LD context doc. Some LinkedData developers seem to
>>>>> > prefer using it.
>>>>> >
>>>>> > We had a new issue filed this week about it, and on the issue triage
>>>>> > call we came up with a novel solution: move the file to its own
>>>>> > repository in the SWICG namespace, and let people who are interested
>>>>> > in using and maintaining it work on the project.
>>>>> >
>>>>> > The new repository is here:
>>>>> >
>>>>> > https://github.com/swicg/activitystreams2-owl
>>>>> >
>>>>> > Big appreciation to Emelia Smith for getting the process rolling.
>>>>> > We've already had one PR applied.
>>>>> >
>>>>> > I had removed the file from the w3c/activitystreams repo, but Ben
>>>>> > Goering pointed out that it probably needed more consensus and a
>>>>> > discussion here.
>>>>> >
>>>>> > So, let's discuss!
>>>>> >
>>>>> > I'd love to see this unofficial file maintained and updated. I think
>>>>> > moving it to a repo where people in the LD community can maintain it
>>>>> > is a great solution.
>>>>> >
>>>>> > Evan
>>>>> >
>>>>> >
>>>>>
>>>>>
>
> --
> Aaron Gray - @AaronNGray@fosstodon.org | @aaronngray@threads.net |
> @AaronNGray@Twitter.com
>
> Independent Open Source Software Engineer, Computer Language Researcher
> and Designer, Amateur Type Theorist, Amateur Computer Scientist,
> Environmentalist and Climate Science Researcher and Disseminator.
>
>

-- 
Aaron Gray - @AaronNGray@fosstodon.org | @aaronngray@threads.net |
@AaronNGray@Twitter.com

Independent Open Source Software Engineer, Computer Language Researcher and
Designer, Amateur Type Theorist, Amateur Computer Scientist,
Environmentalist and Climate Science Researcher and Disseminator.