Re: EasierRDF

Hi Melvin,

Thanks for your response.

                Can you please elaborate on where these properties “name”, “born”, “spouse” are coming from? Are they exhaustively listed somewhere? Or can any publisher simply use their “own” properties? If so, how do clients know what keys to use to get the name, birthdate, spouse, .. of objects from different publishers? (“born” is not as meaningful as you may think – it could refer to place of birth too, for instance) Or, what if some publishers want to be more fine-grained (first name, initials, last name)? Would clients need to utilize NLP methods?

It's just JSON.  So, same as the way any JSON API is used on the web today

                Let me clarify my question – are they agreed-upon terms or is everyone free to define their own keys?

I believe you’re equating the utility of ontologies with inferencing (correct me if I’m wrong), but IMO their core purpose is precisely to define shared vocabularies for concepts like these (first/last name, birthdate, birthplace, ..) (A.k.a., a “shared conceptualization of a domain”.). Software clients, programmed to recognize a set of well-known vocabularies, can understand all content published using those vocabularies.

The taxonomy and name spacing is useful

But so often they are human readable guides, rather than pulling in the triples and inferring from them.  Sometimes the machine readable triples are missing, and the s/w doesnt really notice

                Oh yeah I agree with you there. A major problem is that most namespace IRIs cannot be de-referenced after a while (when folks lose interest, or funding runs out). Well, since they’re IRIs, it’s not mandatory they can be resolved to begin with, it’s just good practice. But IMO this doesn’t take away the usefulness of namespaces acting as, well, namespaces for vocabularies.

Re the discussion around “ex:” – of course, if everyone uses their own vocabulary this will defeat the whole purpose. I don’t think that was the takeaway of that example (it rather concerned the Turtle vs. JSON syntax).

So, I was saying that JSON is simpler for web devs.  The ex: vocab if it's relative, which I expect, would ensure that keys are NOT matched.  In JSON APIs they are matched by keys.

I’m confused about this statement. A relative IRI such as foaf:name would be resolved to an absolute IRI http://xmlns.com/foaf/0.1/name during parsing, which can be perfectly string-matched to the resolution of another term. (Or, maybe I misunderstand what you mean by “relative”?)

                This is assuming that the RDF snippet is syntactically valid and defines the utilized namespaces. (Hans’ example didn’t do this, since its focus, AFAICT, wasn’t on namespaces but rather ease of syntax.)

JSON keys OTOH are simply JSON keys and can be compared character for character
So are RDF terms :-) A client that is pre-programmed with a known set of vocabularies can compare the found RDF terms character-by-character to their programmed vocabularies, and then do something useful with the data.

As I said, not with relative URIs.

                Nope (unless I misunderstand what you mean with “relative”).

It's also not back compat with regular JSON.  Dont you think RDF would be so much better if every JSON API on the web would work with it?

                I totally agree with you here – JSON is natively supported in JS, while RDF is not. I assume that’s also what you mean by “JSON doesn’t need a parser” – of course it does, but once it’s parsed (e.g., using JSON.parse) one can work with JSON as native constructs in JS.

                That said, there are the NS.js<https://github.com/rdfjs/N3.js/> and graphy.js<https://github.com/blake-regalia/graphy.js> libraries that allow one to handle RDF in JS quite easily. E.g., graphy.js allows one to “Construct RDF data using ES object literals that reflect the tree-like structure of quads, graph -> subject -> predicate -> object, including nested blank nodes and RDF collections.” This actually got me interested in trying out this library (maybe there isn’t such a big impedance mismatch between RDF and JS!)


William


__________________________________________
From: Melvin Carvalho <melvincarvalho@gmail.com<mailto:melvincarvalho@gmail.com>>
Sent: maandag 14 februari 2022 15:49
To: Frederik Byl <frederik.byl@gmail.com<mailto:frederik.byl@gmail.com>>
Cc: Semantic Web <semantic-web@w3.org<mailto:semantic-web@w3.org>>; David Booth <david@dbooth.org<mailto:david@dbooth.org>>
Subject: Re: EasierRDF



On Fri, 11 Feb 2022 at 13:24, Frederik Byl <frederik.byl@gmail.com<mailto:frederik.byl@gmail.com>> wrote:
Dear community,

I came across the project https://github.com/w3c/EasierRDF. I think it is a good idea to have a look at RDF and the challenges it has. I'm struggling with the use, because the work that is necessary to make systems interoperable by understanding ontologies, formatting the data, extending ontologies, writing queries, etc, is huge! I am a big fan of graph databases and the ease of using Neo4j, Cypher, plain json and writing converters between readable json formats is so much faster and developer friendly. Queries in Cypher are intuitively and can be understood on sight. I am also looking at Solid and I find the approach of data pods extremely interesting and relevant, but the structure is so overwhelming and overcomplicated that I start losing faith in this. Since the project EasierRDF is started, I guess others struggle with the same? Are there some major advantages of using RDF and Sparql over Neo4j and Cypher? We could do linked data with Json-ld and Neo4j?

I came to realize than in 15 years of heavy RDF use, the useful 10% is what I use 90% of the time

You might want to look at this one-pager which tries to take some of the useful bits of RDF (@id @type @context) and add it to JSON

https://linkedobjects.org/

It is for beginners getting started, and has an upgrade path to JSON-LD and full RDF, for those that want it.  It's also compatible with plain old JSON, without needing the overhead of creating and maintaining ontologies (which let's face it, almost no one does or cares about today)

Use cases and libraries are yet to be built out, but hopefully some food for thought


Thanks

Kind regards,
Frederik

---------- Forwarded message ---------
Van: David Booth <david@dbooth.org<mailto:david@dbooth.org>>
Date: do 10 feb. 2022 om 16:56
Subject: Re: EasierRDF
To: Frederik Byl <frederik.byl@gmail.com<mailto:frederik.byl@gmail.com>>


Hi Frederik,

You are asking an excellent question, and I think the community as a
whole would benefit from discussing it on a public list, both to get
more viewpoints and to expose your question to other existing RDF users.
  Would you be willing to post your question to the public
semantic-web@w3.org<mailto:semantic-web@w3.org> list?
https://lists.w3.org/Archives/Public/semantic-web/

Thanks,
David Booth

On 2/10/22 10:43, Frederik Byl wrote:
> Dear David,
>
> I am sorry to contact you in this straightforward manner. I came across
> your project https://github.com/w3c/EasierRDF
> <https://github.com/w3c/EasierRDF>. I think it is a good idea to have a
> look at RDF and the challenges it has. I'm struggling with the use and
> the work that is necessary to make systems interoperable by
> understanding ontologies, formatting the data, extending ontologies etc,
> is huge! I am a big fan of graph databases and the ease of using Neo4j
> and plain json and writing converters between readable json formats is
> so much faster and developer friendly. I am also looking at Solid and I
> find the approach of data pods extremely interesting and relevant, but
> the structure is so overwhelming and overcomplicated that I start losing
> faith in this.Since you started the project Easier RDF, I guess you
> struggle with the same, or do you see some major advantages in using RDF?
>
> Thanks
>
> Kind regards,
> Frederik