DebugQueries

This page contains several SPARQL-Queries to help debug the graph.

Useful Queries

A List of accessible queries, that are usefull to understand the structure of the graph and identify problems, such as missing links.

Backlinks

A query that finds all backlinks to a specific item.

Items used: GLSL (Q61)

Properties used: depends on (P1)

PREFIX wdt: <https://graphit.ur.de/prop/direct/>
PREFIX wd: <https://graphit.ur.de/entity/>
SELECT DISTINCT ?source ?sourceLabel
WHERE {
  ?source wdt:P1 wd:Q61.
  service wikibase:label { bd:serviceParam wikibase:language "en". }
}

Try it!

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Missing Properties

Resources

No Resources

Returns all Items, that don't have any resource that they link to.

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Unlinked Resources

Returns all resources, that have not been linked to any item yet.

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No Subclass

Returns all Items, that don't have a property subclass.

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No Dependencies

Returns all Items, that don't link any other items as dependency.

These items don't have a property depends on. This could mean, that they are a source or that they are orphaned.

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Orphans

Returns all items, that don't link to any other items and are not linked to in return.

NOTE: Not sure if this works.