Yasgui | Yet Another Sparql GUI | Data Manipulation library
kandi X-RAY | Yasgui Summary
kandi X-RAY | Yasgui Summary
Yet Another Sparql GUI
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QUESTION
I'm querying the IdRef Sparql endpoint to get researchers co-authors. In order to get more complete results, I'm doing a federated query against HAL endpoint.
My query works pretty well but generates duplicates, which I aim to de-duplicate using authorities identifiers (ORCID, ISNI or whatever).
So far, I achieved the following query, but now my problem is that one result is missing.
My query is:
...ANSWER
Answered 2021-Oct-02 at 22:55Marie Masclet de Barbarin is hidden precisely because there is another person, Emma Bester, who also does not have an owl:sameAs
edge.
Consider this query:
QUESTION
I'm using SPARQLWrapper to query a local SPARQL endpoint (using apache-jena-fuseki), and some of my queries are CONSTRUCT queries.
The query will give me valid results on web-based SPARQL interface, e.g. yasgui. When using SPARQLWrapper, the default query method will give me this error:
...ANSWER
Answered 2020-Nov-05 at 17:35SPARQLWrapper defaults to adding
&format=turtle&output=turtle&results=turtle
to the request.
SPARQLWrapper has a method setOnlyConneg
that turns off the adding of the additional query string parts.
The
WARN SPARQL Query: Unrecognize request parameter (ignored): results
happens because Fuseki does understandresults
and logs a warning about it. It is just a warning.format
is a mechanism to override the proper HTTP content negotiation mechanism because in some situations it is hard to set the HTTP headers. This does not apply to SPARQLWrapper which does correctly setAccept:
.format=turtle
isn't in the list of names for a CONSTRUCT query.ttl
is. (`turtle can be added to future version of Fuseki for completeness).
The best way is not to have the non-standard query string parameters with setOnlyConneg
. SPARQLWrapper correctly sets the "Accept:" header in the request and Fuseki has content negotiation and will work with that header.
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