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Posted to dev@jena.apache.org by LB <co...@googlemail.com.INVALID> on 2022/02/04 08:49:00 UTC
Fuseki UI with RDF Star
Hi all,
just using latest Fuseki UI and it looks like
1) RDF Star isn't supported by the query parser - it complains with some
red marker but at least we can run queries nevertheless
2) more problematic, it can't visualize RDF Star neither from SELECT
queries in a table nor for CONSTRUCT queries
Especially 2) I find rather misleading as the only feedback you get is
something like "Unexpected "<<" on line 66." which comes from the result
parser I guess.
Am I missing something, maybe using just the wrong version or a too old
part of YASGUI? Or is it a known limitation you're aware of? If so,
maybe we should mention it somewhere?
Cheers,
Lorenz
Re: Fuseki UI with RDF Star
Posted by LB <co...@googlemail.com.INVALID>.
Hey Andy,
I see.
Yeah, YASR is using N3 to parse at the Graph Result, used version is
"n3": "^1.3.5"
there is already a newer version for N3 which I think is capable of
parsing RDF Star [1] (modulo bugs [2] )
So for Graph results it would take to bump the N3 version and adapt YASR
code.
For SELECT queries they're using the own stuff, e.g. for SPARQL+XML it
happens somewhere here:
https://github.com/TriplyDB/Yasgui/blob/71dfb7300436c03371fb1e0a356f034f829ecfa4/packages/yasr/src/parsers/xml.ts#L18
Apparently, CONSTRUCT queries with Turtle as result format at least
return in such a state that you can watch and save the response, for XML
it fails with "server error"
[1] https://github.com/rdfjs/N3.js/blob/main/src/N3Parser.js#L31
[2] https://github.com/rdfjs/N3.js/issues/272
On 04.02.22 11:24, Andy Seaborne wrote:
> Hi Lorenz,
>
> Looks like yasgui doesn't support RDF-star.
>
> I wonder how difficult it is to add the feature.
>
> jena-fuseki-ui:package.json
>
> @triply/yasr => ^4.21.1
>
> which is latest.
>
> On 04/02/2022 08:49, LB wrote:
>> Hi all,
>>
>> just using latest Fuseki UI and it looks like
>>
>> 1) RDF Star isn't supported by the query parser - it complains with
>> some red marker but at least we can run queries nevertheless
>
> We have the latest yasgui - 4.2.20.
>
> https://github.com/TriplyDB/Yasgui/issues/189
>
>> 2) more problematic, it can't visualize RDF Star neither from SELECT
>> queries in a table nor for CONSTRUCT queries
>
> Same issue yasr does not support RDF-star
>
> https://github.com/TriplyDB/Yasgui/issues/190
>
>> Especially 2) I find rather misleading as the only feedback you get
>> is something like "Unexpected "<<" on line 66." which comes from the
>> result parser I guess.
>>
>>
>> Am I missing something, maybe using just the wrong version or a too
>> old part of YASGUI? Or is it a known limitation you're aware of? If
>> so, maybe we should mention it somewhere?
>>
>>
>> Cheers,
>>
>> Lorenz
>>
Re: Fuseki UI with RDF Star
Posted by Andy Seaborne <an...@apache.org>.
Hi Lorenz,
Looks like yasgui doesn't support RDF-star.
I wonder how difficult it is to add the feature.
jena-fuseki-ui:package.json
@triply/yasr => ^4.21.1
which is latest.
On 04/02/2022 08:49, LB wrote:
> Hi all,
>
> just using latest Fuseki UI and it looks like
>
> 1) RDF Star isn't supported by the query parser - it complains with some
> red marker but at least we can run queries nevertheless
We have the latest yasgui - 4.2.20.
https://github.com/TriplyDB/Yasgui/issues/189
> 2) more problematic, it can't visualize RDF Star neither from SELECT
> queries in a table nor for CONSTRUCT queries
Same issue yasr does not support RDF-star
https://github.com/TriplyDB/Yasgui/issues/190
> Especially 2) I find rather misleading as the only feedback you get is
> something like "Unexpected "<<" on line 66." which comes from the result
> parser I guess.
>
>
> Am I missing something, maybe using just the wrong version or a too old
> part of YASGUI? Or is it a known limitation you're aware of? If so,
> maybe we should mention it somewhere?
>
>
> Cheers,
>
> Lorenz
>