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Preliminary support for reasoning over SPARQL query results #569

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5 tasks done
mmarx opened this issue Dec 14, 2024 · 0 comments
Closed
5 tasks done

Preliminary support for reasoning over SPARQL query results #569

mmarx opened this issue Dec 14, 2024 · 0 comments
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@mmarx
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enhancement New feature or request io
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Release 0.7.0

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@mmarx
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mmarx commented Dec 14, 2024 •
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We can already load EDB predicates from external sources. In theory, this could be used to query SPARQL endpoints such as the Wikidata Query Service. In practice, this results in unreadable, hardcoded IRIs and depends on the endpoint to send the results in the correct format.

Building upon #566 and #564, we can improve the ergonomics of such queries by adding a builtin and slightly generalising existing syntax, allowing, e.g.:

@import awards :- tsv{ resource=f"https://query.wikidata.org/sparql?query={URIENCODE(?query)}",
                       format=(iri, string)
                     },
               ?query = "SELECT ?award ?awardLabel WHERE { wd:Q42 wdt:P166 ?award . ?award rdfs:label ?awardLabel FILTER(LANG(?awardLabel) = \"en\")"
@mmarx mmarx added enhancement New feature or request io labels Dec 14, 2024
@mmarx mmarx added this to nemo Dec 14, 2024
@github-project-automation github-project-automation bot moved this to Todo in nemo Dec 14, 2024
@mmarx mmarx mentioned this issue Dec 14, 2024
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mmarx added a commit that referenced this issue Jan 4, 2025
@mmarx
Implement multiline strings and multiline f-strings
93bc4fe 
Fixes #569.
@mmarx mmarx mentioned this issue Jan 4, 2025
Merged
@mmarx mmarx self-assigned this Jan 7, 2025
@mmarx mmarx added this to the Release 0.7.0 milestone Jan 7, 2025
matzemathics added a commit that referenced this issue Jan 8, 2025
@matzemathics
Preliminary support for reasoning over SPARQL query results (#577)
1847c83 
Addresses #569. Based on #564 and #566, so should be merged after those.

With this, we can run the following program:
```prolog
@import awards :- tsv{ resource=f"https://query.wikidata.org/sparql?query={URIENCODE(?query)}",
                       format=(any, string)
                     },
               ?query = """
    SELECT ?award ?awardLabel WHERE {
      wd:Q42 wdt:P166 ?award .
      ?award rdfs:label ?awardLabel FILTER(LANG(?awardLabel) = "en")
    }
    """.

@export awards :- csv{resource=""} .
```

This currently yields the following output:
```
[2025-01-04T00:15:11Z INFO  nemo::io::formats::dsv::writer] Starting data export
?award,"""?awardLabel"""
http://www.wikidata.org/entity/Q906455,"""Ditmar Award@en"""
http://www.wikidata.org/entity/Q2687578,"""Inkpot Award@en"""
[2025-01-04T00:15:11Z INFO  nemo::io::formats::dsv::writer] Finished export: processed 3 tuples (dropped 0)
```
@mmarx mmarx moved this from Todo to Done in nemo Jan 8, 2025
@mmarx mmarx closed this as completed Jan 8, 2025
@mmarx mmarx mentioned this issue Jan 9, 2025
Merged
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