Fetch complete dataset graphs #9

adibaba · 2020-01-28T16:20:22Z

Please ensure that a complete graph of a dataset is fetched.

E.g. the code below would not include a o3:

?dataSet ?predicate ?object
?object ?p2 ?o2
?o2 ?p3 ?o3

        ParameterizedSparqlString pss = new ParameterizedSparqlString("" +
                "PREFIX dcat: <http://www.w3.org/ns/dcat#> " +
                "PREFIX dct: <http://purl.org/dc/terms/> " +
                "CONSTRUCT { " + "?dataSet ?predicate ?object . " +
                "?object ?p2 ?o2} " +
                "WHERE { " +
                ( this.queryWithGraph ? "  GRAPH ?g { " : "") +
                "    ?dataSet ?predicate ?object. " +
                "    OPTIONAL { ?object ?p2 ?o2 } " +
                ( this.queryWithGraph ?  "} " : "") +
                "}");

https://github.com/projekt-opal/converter/blob/developer/dataset-fetcher/src/main/java/org/diceresearch/datasetfetcher/utility/DataSetFetcher.java#L231

The text was updated successfully, but these errors were encountered:

mnafshin · 2020-01-28T16:34:53Z

Do we have a situation for graph of depth 3 ( i.e. ?p3 ?O3) ?

adibaba · 2020-01-28T16:35:54Z

Yes, it seems like the EDP data contains such constructs.

adibaba · 2020-01-29T13:58:57Z

PREFIX dcat: <http://www.w3.org/ns/dcat#>

CONSTRUCT {
  ?d ?p ?x1 .
  ?x1 ?p2 ?x2 .
  ?x2 ?p3 ?x3 .
}
WHERE {
  ?d a dcat:Dataset .
  ?d ?p ?x1 .
  ?x1 ?p2 ?x2 .
  ?x2 ?p3 ?x3 .
  VALUES ?d {
    <https://europeandataportal.eu/set/data/7768d4e3-302c-11e3-beb4-0000c1ab0db6>
  }
}
LIMIT 100

@prefix dcat:  <http://www.w3.org/ns/dcat#> .

<https://europeandataportal.eu/set/distribution/1f66dc56-ea03-4058-a901-2a43ba1abc29>
        dcat:accessURL  <https://www.statistik.at/gs-inspire/VIEW_SU_SUG_ETRS89-LAEA_1K/ows?service=wms&version=1.3.0&request=GetCapabilities> .

<https://www.statistik.at/gs-inspire/VIEW_SU_SUG_ETRS89-LAEA_1K/ows?service=wms&version=1.3.0&request=GetCapabilities>
        a       <http://xmlns.com/foaf/0.1/Document> ;
        <http://purl.org/dc/terms/description>
                "Darstellungsdienst"@de ;
        <http://purl.org/dc/terms/title>
                "SU.StatisticalGridCell"@de .

<https://europeandataportal.eu/set/data/7768d4e3-302c-11e3-beb4-0000c1ab0db6>
        dcat:distribution  <https://europeandataportal.eu/set/distribution/1f66dc56-ea03-4058-a901-2a43ba1abc29> .

example from
opaldata dataset.html?tab=query&ds=/2019-12-17-edp-de

adibaba · 2020-01-29T14:04:04Z

Some more dataset URIs

PREFIX dcat: <http://www.w3.org/ns/dcat#>

SELECT ?d
WHERE {
  ?d a dcat:Dataset .
  ?d ?p ?x1 .
  ?x1 ?p2 ?x2 .
  ?x2 ?p3 ?x3 .
#  ?x3 ?p4 ?x4 .
}
LIMIT 50

d

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Fetch complete dataset graphs #9

Fetch complete dataset graphs #9

adibaba commented Jan 28, 2020

mnafshin commented Jan 28, 2020

adibaba commented Jan 28, 2020

adibaba commented Jan 29, 2020

adibaba commented Jan 29, 2020

Fetch complete dataset graphs #9

Fetch complete dataset graphs #9

Comments

adibaba commented Jan 28, 2020

mnafshin commented Jan 28, 2020

adibaba commented Jan 28, 2020

adibaba commented Jan 29, 2020

adibaba commented Jan 29, 2020

d