[Open-transport] JSON-LD Support for Public Transport

Wed Jun 10 17:14:12 UTC 2015

Hi Stefan,

Json-ld can also add more elements without using URIs or blank nodes.
That's indeed why it's not entirely rdf. Yet my point was that rdf whatever
can be serialised in json-ld in the same way it serialises to turtle or
rdf/XML.

Let's not get into a discussion where everyone wants to have its say about
how good or bad rdf is (there are other mailinglists for that - try
public-lod at w3c) yet if we want to have a system to globally define
things and concepts, let's please use URIs as a common system: it's
lightweight and it just works. Using linked data technologies to publish
datasets in the longer term seems like a pragmatic choice then.

Kind regards,

Pieter

Op wo 10 jun. 2015 19:01 schreef Keller Stefan <sfkeller at hsr.ch>:

>  Pieter, Hannes, all
>
>
>
> On Tue, Jun 9, 2015 at 1:49 PM, Pieter Colpaert <pieter.colpaert at okfn.org>
> wrote:
>
> > I'm a big fan of json-ld (really: it is rdf, so no need to make the
> distinction... It's just yet another serialisation ;) )
>
>
>
> That’s flattering for JSON-LD but not correct. JSON-LD is "compatible with
> RDF, but that’s about it. You could convert JSON-LD to and from RDF and get
> something useful, but JSON-LD had a more sane data model (...) you could
> use JSON-LD using a simple library and standard JSON tooling."
>
>
>
> That was a quote from the insightful blog post by one of the creators of
> JSON-LD about "JSON-LD and Why I Hate the Semantic Web",
> http://manu.sporny.org/2014/json-ld-origins-2/ .
>
>
>
> I personally don’t hate RDF. It’s simply not the right tool for the
> semantic web (i.e. for web developers/search engines/data miners and other
> useful things software and database technologies already achieved). Often
> ontologies rather are schemas, thesaurs or vocabularies. And – most
> importantly: RDF is a “shitty data model” – sorry for that other quote from
> the blog post mentioned J.
>
>
>
> Cheers, Stefan
>
>
>
>
>
> *Von:* Hannes Gassert [mailto:hannes at gassert.ch]
> *Gesendet:* Mittwoch, 10. Juni 2015 07:28
> *An:* Pieter Colpaert
> *Cc:* open-transport; transport-wg at opendata.ch
> *Betreff:* Re: [Open-transport] JSON-LD Support for Public Transport
>
>
>
> Pieter,
>
>
>
> I was of course expecting your reply, thanks! :)
>
>
>
> Do you know of any initiative to bake linked public transport data in any
> widely used product? And significant linked data publishers in this field,
> apart from perhaps http://transport.data.gov.uk/? It sounds like the
> future, but how close is it to the present, from your p.o.v?
>
>
>
> Best,
>
> Hannes
>
>
>
>
>
>
>
>
>
> On Tue, Jun 9, 2015 at 1:49 PM, Pieter Colpaert <pieter.colpaert at okfn.org>
> wrote:
>
> Hi Hannes,
>
> I'm a big fan of json-ld (really: it is rdf, so no need to make the
> distinction... It's just yet another serialisation ;) ) and have done some
> projects already. Schema.org is great for search engines, but is limited
> for algorithmic use or is limited when expressing the semantics of
> something.
>
> This email is from my phone, but have a look on our
> github.com/opentransport , where you'll see the vocabulary, linked-gtfs
> and stoptimes. Contains work in progress. Linked gtfs can already be used.
>
> Feel free to contact me through Skype for more info :)
>
> Pieter
>
>
>
> Op di 9 jun. 2015 10:16 schreef Hannes Gassert <hannes at opendata.ch>:
>
> Dear Open Transport Data experts,
>
>
>
> Google understands "linked data" trip information in JSON-LD[1], in Gmail,
> Google Now and probably other places — but for flights only[2].
>
>
>
> As JSON-LD seems to deliver on the original promise of the semantic web
> ("my email program understands I have a flight to take, and can tell my
> calendar, yay!"), has pretty serious supporters from Healthdata.gov to
> Microsoft and is much, much easier to understand for common web folks than
> RDF, it does look interesting for sure. But now let's say we take a train
> ride and want to map that to JSON-LD. We could either try to use the schema
> for flights, just replacing airports with train stations. Might actually
> work, but only barely.
>
>
>
> Or we could petition the relevant players to support public transport
> schemata. Which do in fact exist, for JSON-LD, at schema.org[3].
>
>
>
> Did anybody ever try to do that? Anyone having real-life
> JSON-LD-for-Transport experience? Or doing research on this?
>
>
>
> I'm very interested in hearing your stories and input on this, I'm
> convinced deeper integration of better tools can make a huge difference for
> public transport!
>
>
>
> Looking forward to hearing from you,
>
> Hannes
>
>
>
>
>
> [1] See http://manu.sporny.org/2014/json-ld-origins-2/ for an
> entertaining, opinionated intro, or e.g https://youtu.be/vioCbTo3C-4
>
> [2] See
> https://developers.google.com/gmail/markup/reference/flight-reservation
>
> [3] See https://schema.org/TrainTrip, https://schema.org/BusTrip, etc.
>
>
>
>
>
> --
>
> Opendata.ch - Enabling Open Data in Switzerland
> Hannes Gassert // Founding Board Member
> +41 78 663 11 09 // hannes.gassert at opendata.ch
>
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>
>
> --
>
> Hannes Gassert  |  http://gassert.ch  |  +41 78 663 11 09
>
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