SPARQL Examples - Revision history

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2024-01-10T11:17:47Z

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2024-01-10T11:05:03Z

2023-02-13T16:42:53Z

2023-01-31T14:59:19Z

Embedded Wikidata query

← Older revision		Revision as of 14:59, 31 January 2023
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	===Embedded Wikidata query===		===Embedded Wikidata query===
	This is a toy example only. Embedded queries like these are better suited for situations where the same URIs are used in more than one triple store and you want to combine data. ~~Instead~~, the example searches for similar labels, and this is something graph databases may not be optimised for. Moreover, Wikidata uses language-tagged strings whereas KG4News uses plain strings, so the labels cannot even be directly compared.		This is a toy example only. Embedded queries like these are better suited for situations where the same URIs are used in more than one triple store and you want to combine data. But Wikidata and KG4News do not use the same URIs. So instead, the example searches for similar labels, and this is something graph databases may not be optimised for. Moreover, Wikidata uses language-tagged strings whereas KG4News uses plain strings, so the labels cannot even be directly compared.
	<syntaxhighlight lang="SPARQL">		<syntaxhighlight lang="SPARQL">
	PREFIX foaf: <http://xmlns.com/foaf/0.1/>		PREFIX foaf: <http://xmlns.com/foaf/0.1/>

2023-01-31T14:58:26Z

Sorted by descending name

← Older revision		Revision as of 14:58, 31 January 2023
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	</syntaxhighlight>		</syntaxhighlight>

	===Sorted by descending name===		===Sorted by descending name instead===
	<syntaxhighlight lang="SPARQL">		<syntaxhighlight lang="SPARQL">
	ORDER BY DESC(?name)		ORDER BY DESC(?name)

2023-01-31T14:58:11Z

Similar filter that ignores capitalisation (lower/upper case)

← Older revision		Revision as of 14:58, 31 January 2023
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	</syntaxhighlight>		</syntaxhighlight>

	===~~Similar~~ filter that ignores capitalisation (lower/upper case)===		===Alternative filter that ignores capitalisation (lower/upper case)===
	<syntaxhighlight lang="SPARQL">		<syntaxhighlight lang="SPARQL">
	FILTER(REGEX(STR(?title), "Semantic Web", "i"))		FILTER(REGEX(STR(?title), "Semantic Web", "i"))

2023-01-31T14:57:14Z

Add one or more triples

← Older revision		Revision as of 14:57, 31 January 2023
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	INSERT DATA { # note the Turtle-like syntax		INSERT DATA { # note the Turtle-like syntax
	kg:paper_123 rdf:type ss:Paper ;		kg:paper_123 rdf:type ss:Paper ;
	ss:title "Semantic Knowledge Graphs for the News: A Review"@en ;		ss:title "Semantic Knowledge Graphs for the News: A Review"@en ;
	kg:year 2022 ;		kg:year 2022 ;
	dct:contributor kg:auth_456, kg:auth_789 .		dct:contributor kg:auth_456, kg:auth_789 .

2023-01-31T14:56:57Z

Add one or more triples

← Older revision		Revision as of 14:56, 31 January 2023
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	PREFIX ss: <http://semanticscholar.org/>		PREFIX ss: <http://semanticscholar.org/>

	INSERT DATA { # note the Turtle syntax		INSERT DATA { # note the Turtle-like syntax
	kg:paper_123 rdf:type ss:Paper ;		kg:paper_123 rdf:type ss:Paper ;
	ss:title "Semantic Knowledge Graphs for the News: A Review"@en ;		ss:title "Semantic Knowledge Graphs for the News: A Review"@en ;

2023-01-31T14:56:36Z

Add one or more triples

← Older revision		Revision as of 14:56, 31 January 2023
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	===Add one or more triples===		===Add one or more triples===
	~~You~~ need a Blazegraph that allows writing ~~from now on~~, for example the [http://sandbox.i2s.uib.no I2S sandbox]. Remember to ''create a new namespace'' first and make sure you ''use'' it afterwards.		From now on you need a Blazegraph that allows writing, for example the [http://sandbox.i2s.uib.no I2S sandbox]. Remember to ''create a new namespace'' first and make sure you ''use'' it afterwards.
	<syntaxhighlight lang="SPARQL">		<syntaxhighlight lang="SPARQL">
	PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>		PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

2023-01-31T14:56:09Z

Embedded Wikidata query

← Older revision		Revision as of 14:56, 31 January 2023
Line 150:		Line 150:

	===Embedded Wikidata query===		===Embedded Wikidata query===
	This is a toy example only. Embedded queries like ~~this is~~ better suited for situations ~~when~~ the same URIs are used in more than one triple store and you want to combine ~~their triples~~. Instead, the example searches for similar labels, ~~which~~ graph databases may not be optimised for. Moreover, Wikidata uses language-tagged strings whereas KG4News uses plain strings, so the labels cannot be directly compared.		This is a toy example only. Embedded queries like these are better suited for situations where the same URIs are used in more than one triple store and you want to combine data. Instead, the example searches for similar labels, and this is something graph databases may not be optimised for. Moreover, Wikidata uses language-tagged strings whereas KG4News uses plain strings, so the labels cannot even be directly compared.
	<syntaxhighlight lang="SPARQL">		<syntaxhighlight lang="SPARQL">
	PREFIX foaf: <http://xmlns.com/foaf/0.1/>		PREFIX foaf: <http://xmlns.com/foaf/0.1/>