SPARQL Tips: Difference between revisions
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(Created page with "== PREFIXES == ''in Wikidata prefixes don't need to be specified explicitly in SPARQL queries''. However, in our Wikibase.cloud instance, prefixes must be explicitly stated, as [https://kbtestwikibase.wikibase.cloud/wiki/Project:SPARQL/examples#Federated_querying:_mixing_data_from_this_Wikibase_with_data_from_Wikidata this example] shows. Please note and mind the distinction between PREFIX kbwdt, kbwd, wdt and wd.<BR> <sparql list="1" tryit="1"> PREFIX rlwd: <https://ri...") |
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== | == Prefixes == | ||
''in Wikidata prefixes don't need to be specified explicitly in SPARQL queries''. However, in our Wikibase.cloud instance, prefixes must be explicitly stated, as [https://kbtestwikibase.wikibase.cloud/wiki/Project:SPARQL/examples#Federated_querying:_mixing_data_from_this_Wikibase_with_data_from_Wikidata this example] shows. Please note and mind the distinction between PREFIX kbwdt, kbwd, wdt and wd.<BR> | ''in Wikidata prefixes don't need to be specified explicitly in SPARQL queries''. However, in our Wikibase.cloud instance, prefixes must be explicitly stated, as [https://kbtestwikibase.wikibase.cloud/wiki/Project:SPARQL/examples#Federated_querying:_mixing_data_from_this_Wikibase_with_data_from_Wikidata this example] shows. Please note and mind the distinction between PREFIX kbwdt, kbwd, wdt and wd.<BR> | ||
<sparql list="1" tryit="1"> | <sparql list="1" tryit="1"> | ||
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} | } | ||
</sparql> | </sparql> | ||
== Highlighting and color-coding SPARQL query == | |||
ISSUE: ''the Wikidata [https://www.wikidata.org/wiki/Template:SPARQL SPARQL template] for query syntax highlighting is not implemented in this Wikibase''. | |||
: SOLUTION: Instead one must use a ''<nowiki><sparql tryit="1">...</sparql></nowiki>'' wrapper, as demonstrated [https://kbtestwikibase.wikibase.cloud/w/index.php?title=Project:SPARQL/examples&action=submit in this example].<br> '''Look example above'''<br> | |||
== Exact URL == | |||
The exact URL [https://kbtestwikibase.wikibase.cloud/wiki/Project:SPARQL/examples https://kbtestwikibase.wikibase.cloud/wiki/'''Project:SPARQL/examples'''], as well as the correct formatting of this page, are important to correctly display these query examples in the [https://kbtestwikibase.wikibase.cloud/query/# query services interface] | |||
Latest revision as of 14:47, 17 January 2023
Prefixes
in Wikidata prefixes don't need to be specified explicitly in SPARQL queries. However, in our Wikibase.cloud instance, prefixes must be explicitly stated, as this example shows. Please note and mind the distinction between PREFIX kbwdt, kbwd, wdt and wd.
The following query uses these:
PREFIX rlwd: <https://riga-literata.wikibase.cloud/entity/>
PREFIX rlwdt: <https://riga-literata.wikibase.cloud/prop/direct/>
SELECT ?item ?itemLabel
WHERE
{
?item rlwdt:P1 rlwd:Q6.
SERVICE wikibase:label { bd:serviceParam wikibase:language "en,[AUTO_LANGUAGE]". }
}
Highlighting and color-coding SPARQL query
ISSUE: the Wikidata SPARQL template for query syntax highlighting is not implemented in this Wikibase.
- SOLUTION: Instead one must use a <sparql tryit="1">...</sparql> wrapper, as demonstrated in this example.
Look example above
Exact URL
The exact URL https://kbtestwikibase.wikibase.cloud/wiki/Project:SPARQL/examples, as well as the correct formatting of this page, are important to correctly display these query examples in the query services interface