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  • Nov 28 22:22
    devkral commented #463
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    Downgrade to webpack@4, ref #457 2.1.3 (compare)

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Blake Regalia
@blake-regalia
@larjohn sure, graphy lets you do that too :)
const iterable = graphy.c3({
   '>http://id.loc.gov/authorities/names/n50048460': {
      'madsrdf:ElementList': [  // object list
         [  // RDF collection
            {  // blank node
               a: 'madsrdf:FullNameElement',
               'madsrdf:elementValue': '"Oliphant,',
            },
            {  // another blank node
               a: 'madsrdf:TermsOfAddressNameElement',
               'madsrdf:elementValue': '@en"Mrs.',
            },
         ],
      ],
   },
});

for(const quad of iterable) {
   otherLib.doStuff(quad);
}
if you prefer to pass in RDFJS terms rather than strings that works too, just make sure to use computed property notation for keys e.g., {[namedNode('http://...')]: { ...}}
Jeff Zucker
@jeff-zucker
are there any good SQL<-->SPARQL and/or Database-->RDF apps? I believe RDF2X does RDF-->Database, anyone used it?
Martynas Jusevicius
@namedgraph_twitter
what do you mean with <-->? :)
virtualization? then maybe something like https://ontop-vkg.org/
i've used http://d2rq.org/ in the past but it's outdated by now
Jeff Zucker
@jeff-zucker
@namedgraph_twitter thanks, those are all very relevant ... by <--> I mean I want to query the RDBMS with SPARQL and get back RDF
Iwan Aucamp
@aucampia
Is there some list of problems solved by semantic web technology somewhere?
Joep Meindertsma
@joepio
Iwan Aucamp
@aucampia

some I have here:

Working with heterogenous linked data
Accommodating semantic heterogeneity
Working under an open world assumption
Working without a unique name assumption
Accommodating data model composition and extension

thanks a bunch Joep
Tomasz Pluskiewicz
@tpluscode
Open World does not resonate well with most people
for the closed schema mindset it is more often an obstacle
to me the way to repackage it something along the lines of "data integration at web scale" or "built-in data distribution"
Iwan Aucamp
@aucampia
@tpluscode Well it is a real and critical problem solved fairly well by RDF, in a way things like JSON schema or SQL for example does not solve it
well at least in the context I will communicate this I don't think it will be a problem
though I can see cases where it would be
Tomasz Pluskiewicz
@tpluscode
I totally agree
Iwan Aucamp
@aucampia
Banks and mobile network operators for example don't need to operate under an open world assumption when it comes to user account data
and for them yes, RDF will be an obstacle, but if you are working with geological data and measurements about oil wells etc then you do have to operate under an open world assumption
very nice
Martynas Jusevicius
@namedgraph_twitter
does anyone know if there is a way to access the active TLS client certificate via browser API?
Iwan Aucamp
@aucampia
not sure, never tried something like that
is there some formal spec for linked property graphs?
Blake Regalia
@blake-regalia
anyone seen some real-world usage of XSPARQL they can share?
Adrian Gschwend
@ktk
I did not even know that is a thing
Sarven Capadisli
@csarven
Used it briefly like 10 years ago.. but haven't seen it in the wild beyond research circles.
Tim Berners-Lee
@timbl
It seemed to me to be a great tool for going between the words of XML and RDF bother ways … basically you shop each query language in the middle where there is set of bindings passed, and allow any top with any bottom
Miguel Rochefort
@miguelrochefort
I need some guidance on 2 things.
  1. Are there any RDF database implementations that support syncing, preferably using CRDT over P2P?
  2. Are there high-performance RDF database implementations that support time-series data? Things like GPS location, heart rates, clicks, temperatures, browser history. Last time I checked, temporal data was still problematic with RDF. I'd like to know if I need to bite the bullet and use 2 different types of database (graph and time series), or if there is hope to unify them into one.
Miguel Rochefort
@miguelrochefort
I'd like to hear about non-RDF graph database as well, if no RDF ones support these use cases. Thank you.
Martynas Jusevicius
@namedgraph_twitter
@miguelrochefort Datomic might be relevant re. time series https://www.datomic.com/
I also know Dydra's been doing smth with CRDTs https://dydra.com
they've also published this paper: https://dl.acm.org/doi/fullHtml/10.1145/3308560.3316517
Martynas Jusevicius
@namedgraph_twitter

quote:

Dydra implements a transaction-time temporal RDF store with a particular form of what is characterised as a “timestamp-based approach”.

Miguel Rochefort
@miguelrochefort
@namedgraph_twitter Thanks, I considered them before but might have to take another look at them.
While we're at it, are there any good RDF editors/browsers out there?
Martynas Jusevicius
@namedgraph_twitter
i'm too biased to say how good it is
Adrian Gschwend
@ktk
@miguelrochefort I know that @bergos has something like that, in early stages at least
Thomas Bergwinkl
@bergos
@miguelrochefort i'm working on a in memory store synced using Raft, but i guess if you are talking about CRDT and P2P that's not exactly what you are looking for. maybe one package i'm using could be useful to create the diffs: https://www.npmjs.com/package/rdf-dataset-changelog
Thomas Bergwinkl
@bergos
i'm not aware of a store optimized for time series, but to get the best performance out of existing stores i would use the https://github.com/zazuko/rdf-cube-schema for the data. i have millions of observations in a virtuoso instance running on standard desktop computer hardware with acceptable query times.
Adrian Gschwend
@ktk

While we're at it, are there any good RDF editors/browsers out there?

depends on what you mean, for browsing we have Trifid which gives a HTML frontend for the triples, this can for example do this

For a more graph-oriented visualization there is ontodia, which has an open source version here
the OSS release provides less features though, no authoring AFAIK
for basic editing in Turtle you might want to check out some web components we did