Demonstrat interop with rdflib.js

[nicholascar]

rdflib.js is, I think, the major JavaScript RDF toolkit. How does Ontola's Hextuples software interoperate with it, if at all?

I'm expecting to see something like the HexTuples parser being able to produce a filled rdflib.js store but I can't see this myself.

What about serializing an rdflib.js store to HexTuples?

[joepio]

Hi! I think adding both hextuples parsing and serialisation logic to rdflib.js shouldn't be too hard. I've worked on that library some time ago ago (converting it to typescript and documenting functions), and it's definitely doable. But I don't think that I'll be implementing this, since we're not using rdflib.js anymore. It's performance isn't as good as @ontola/core @ontologies/core + link-lib, which is optimized for hextuples.

[nicholascar]

So what JS library would you recommend for doing general RDF manipulation after loading HexTuples or other RDF data?

You mention @ontoloa/core but where exactly is that repo? I can't see 'core' in https://github.com/ontola/.

Is the library you mention fully features for RDF manipulation? Can you serialize to formats other than HexT? Can you loop through RDF data, add to it programmatically, perhaps SPARQL query it?

I'm starting to need RDF libraries in JS and I'm not too thrilled with rdflib.js, so I'd appreciate any pointers to what others find useful.

[joepio]

Whoops, I meant to type @ontologies/core! https://github.com/ontola/ontologies

We use link-lib (by @rescribet) for storing and querying in a JS context. Check out its match function. It, in turn, uses @ontologies/core. I don't think it supports multiple RDF serialization output formats or SPARQL queries, but its query options are good enough to power our SAAS e-democracy platform Argu.co.

[nicholascar]

Thanks for the pointer @joepio! ontola/ontologies does look pretty easy to use so I'll give it a go!

I see you have a similar thing to Python RDFLib for providing well-known namespaces to users. This has been a tricky thing in RDFLib due to some people wanting lots of namespaces included, others none! We have about 20 at the moment (https://github.com/RDFLib/rdflib/tree/master/rdflib/namespace).