[Wikidata-tech] Linking RDF resources for external IDs

Wed, 09 Nov 2016 08:46:37 -0800 

Hi Stas, Markus, Denny!

For a long time now, we have been wanting to generate proper resource references
(URIs) for external identifier values, see
<https://phabricator.wikimedia.org/T121274>.

Implementing this is complicated by the fact that "expanded" identifiers may
occur in four different places in the data model (direct, statement, qualifier,
reference), and that we can't simply replace the old string value, we need to
provide an additional value.

I have attached three files with snippets of three different RDF mappings:
- Q111.ttl - the status quo, with normalized predicates declared but not used.
- Q111.rc.ttl - modeling resource predicates separately from normalized values.
- Q111.norm.ttl - modeling resource predicates as normalized values.

The "rc" variant means more overhead, the "norm" variant may have semantic
difficulties. Please look at the two options for the new mapping and let me know
which you like best. You can use a plain old diff between the files for a first
impression.

-- 
Daniel Kinzler
Senior Software Developer

Wikimedia Deutschland
Gesellschaft zur Förderung Freien Wissens e.V.

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix wikibase: <http://wikiba.se/ontology-beta#> .
@prefix wdata: <http://localhost/daniel/wikidata/index.php/Special:EntityData/> .
@prefix wd: <http://www.wikidata.org/entity/> .
@prefix wds: <http://www.wikidata.org/entity/statement/> .
@prefix wdref: <http://www.wikidata.org/reference/> .
@prefix wdv: <http://www.wikidata.org/value/> .
@prefix wdt: <http://www.wikidata.org/prop/direct/> .
@prefix wdtn: <http://www.wikidata.org/prop/direct-normalized/> .
@prefix p: <http://www.wikidata.org/prop/> .
@prefix ps: <http://www.wikidata.org/prop/statement/> .
@prefix psv: <http://www.wikidata.org/prop/statement/value/> .
@prefix psn: <http://www.wikidata.org/prop/statement/value-normalized/> .
@prefix pq: <http://www.wikidata.org/prop/qualifier/> .
@prefix pqv: <http://www.wikidata.org/prop/qualifier/value/> .
@prefix pqn: <http://www.wikidata.org/prop/qualifier/value-normalized/> .
@prefix pr: <http://www.wikidata.org/prop/reference/> .
@prefix prv: <http://www.wikidata.org/prop/reference/value/> .
@prefix prn: <http://www.wikidata.org/prop/reference/value-normalized/> .
@prefix wdno: <http://www.wikidata.org/prop/novalue/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix schema: <http://schema.org/> .
@prefix cc: <http://creativecommons.org/ns#> .
@prefix geo: <http://www.opengis.net/ont/geosparql#> .
@prefix prov: <http://www.w3.org/ns/prov#> .

wd:Q111 a wikibase:Item ;
	rdfs:label "silver"@en ;
	skos:prefLabel "silver"@en ;
	schema:name "silver"@en ;
	wdt:P20 "asdfasdf" ;
	wdtn:P20 <http://musicbrainz.org/asdfasdf/place> .

wd:Q111 p:P20 wds:Q111-5459c580-4b6f-c306-184f-b7fa132b32d8 .

wds:Q111-5459c580-4b6f-c306-184f-b7fa132b32d8 a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P20 "asdfasdf" ;
	psn:P20 <http://musicbrainz.org/asdfasdf/place> ;
	pq:P30 "qwertyqwerty" ;
	pqn:P30 <http://vocab.getty.edu/aat/qwertyqwerty> ;
	prov:wasDerivedFrom wdref:7335a5598064cd8716cc9e31d164f2803e376b99 .

wdref:7335a5598064cd8716cc9e31d164f2803e376b99 a wikibase:Reference ;
	pr:P40 "zxcvbnzxcvbn" ;
	prn:P40 <https://www.sbfi.admin.ch/ontology/occupation/zxcvbnzxcvbn> .
	
wd:P20 a wikibase:Property ;
	wikibase:propertyType <http://wikiba.se/ontology-beta#ExternalId> ;
	wikibase:directClaim wdt:P20 ;
	wikibase:directClaimNormalized wdtn:P20 ;
	wikibase:claim p:P20 ;
	wikibase:statementProperty ps:P20 ;
	wikibase:statementValue psv:P20 ;
	wikibase:statementValueNormalized psn:P20 ;
	wikibase:qualifier pq:P20 ;
	wikibase:qualifierValue pqv:P20 ;
	wikibase:qualifierValueNormalized pqn:P20 ;
	wikibase:reference pr:P20 ;
	wikibase:referenceValue prv:P20 ;
	wikibase:referenceValueNormalized prn:P20 ;
	wikibase:novalue wdno:P20 .

p:P20 a owl:ObjectProperty .

psv:P20 a owl:ObjectProperty .

pqv:P20 a owl:ObjectProperty .

prv:P20 a owl:ObjectProperty .

psn:P20 a owl:ObjectProperty .

pqn:P20 a owl:ObjectProperty .

prn:P20 a owl:ObjectProperty .

wdt:P20 a owl:DatatypeProperty .

ps:P20 a owl:DatatypeProperty .

pq:P20 a owl:DatatypeProperty .

pr:P20 a owl:DatatypeProperty .

wdtn:P20 a owl:ObjectProperty .

wdno:P20 a owl:Class ;
	owl:complementOf _:genid2 .

_:genid2 a owl:Restriction ;
	owl:onProperty wdt:P20 ;
	owl:someValuesFrom owl:Thing .

wd:P20 rdfs:label "MusicBrainz place ID"@en .

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix wikibase: <http://wikiba.se/ontology-beta#> .
@prefix wdata: <http://localhost/daniel/wikidata/index.php/Special:EntityData/> .
@prefix wd: <http://www.wikidata.org/entity/> .
@prefix wds: <http://www.wikidata.org/entity/statement/> .
@prefix wdref: <http://www.wikidata.org/reference/> .
@prefix wdv: <http://www.wikidata.org/value/> .
@prefix wdt: <http://www.wikidata.org/prop/direct/> .
@prefix wdtrc: <http://www.wikidata.org/prop/direct-resource/> .
@prefix p: <http://www.wikidata.org/prop/> .
@prefix ps: <http://www.wikidata.org/prop/statement/> .
@prefix psrc: <http://www.wikidata.org/prop/statement-resource/> .
@prefix psv: <http://www.wikidata.org/prop/statement/value/> .
@prefix psn: <http://www.wikidata.org/prop/statement/value-normalized/> .
@prefix pq: <http://www.wikidata.org/prop/qualifier/> .
@prefix pqrc: <http://www.wikidata.org/prop/qualifier-resource/> .
@prefix pqv: <http://www.wikidata.org/prop/qualifier/value/> .
@prefix pqn: <http://www.wikidata.org/prop/qualifier/value-normalized/> .
@prefix pr: <http://www.wikidata.org/prop/reference/> .
@prefix prrc: <http://www.wikidata.org/prop/reference-resource/> .
@prefix prv: <http://www.wikidata.org/prop/reference/value/> .
@prefix prn: <http://www.wikidata.org/prop/reference/value-normalized/> .
@prefix wdno: <http://www.wikidata.org/prop/novalue/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix schema: <http://schema.org/> .
@prefix cc: <http://creativecommons.org/ns#> .
@prefix geo: <http://www.opengis.net/ont/geosparql#> .
@prefix prov: <http://www.w3.org/ns/prov#> .

wd:Q111 a wikibase:Item ;
	rdfs:label "silver"@en ;
	skos:prefLabel "silver"@en ;
	schema:name "silver"@en ;
	wdt:P20 "asdfasdf" ;
	wdtrc:P20 <http://musicbrainz.org/asdfasdf/place> .

wd:Q111 p:P20 wds:Q111-5459c580-4b6f-c306-184f-b7fa132b32d8 .

wds:Q111-5459c580-4b6f-c306-184f-b7fa132b32d8 a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P20 "asdfasdf" ;
	psrc:P20 <http://musicbrainz.org/asdfasdf/place> ;
	pq:P30 "qwertyqwerty" ;
	pqrc:P30 <http://vocab.getty.edu/aat/qwertyqwerty> ;
	prov:wasDerivedFrom wdref:7335a5598064cd8716cc9e31d164f2803e376b99 .

wdref:7335a5598064cd8716cc9e31d164f2803e376b99 a wikibase:Reference ;
	pr:P40 "zxcvbnzxcvbn" ;
	prrc:P40 <https://www.sbfi.admin.ch/ontology/occupation/zxcvbnzxcvbn> .
	
wd:P20 a wikibase:Property ;
	wikibase:propertyType <http://wikiba.se/ontology-beta#ExternalId> ;
	wikibase:directClaim wdt:P20 ;
	wikibase:directClaimResource wdtrc:P20 ;
	wikibase:claim p:P20 ;
	wikibase:statementProperty ps:P20 ;
	wikibase:statementPropertyResource psrc:P20 ;
	wikibase:statementValue psv:P20 ;
	wikibase:statementValueNormalized psn:P20 ;
	wikibase:qualifier pq:P20 ;
	wikibase:qualifierResource pqrc:P20 ;
	wikibase:qualifierValue pqv:P20 ;
	wikibase:qualifierValueNormalized pqn:P20 ;
	wikibase:reference pr:P20 ;
	wikibase:referenceResource prrc:P20 ;
	wikibase:referenceValue prv:P20 ;
	wikibase:referenceValueNormalized prn:P20 ;
	wikibase:novalue wdno:P20 .

p:P20 a owl:ObjectProperty .

psv:P20 a owl:ObjectProperty .

pqv:P20 a owl:ObjectProperty .

prv:P20 a owl:ObjectProperty .

psn:P20 a owl:ObjectProperty .

pqn:P20 a owl:ObjectProperty .

prn:P20 a owl:ObjectProperty .

wdt:P20 a owl:DatatypeProperty .

ps:P20 a owl:DatatypeProperty .

pq:P20 a owl:DatatypeProperty .

pr:P20 a owl:DatatypeProperty .

wdtrc:P20 a owl:ObjectProperty .

psrc:P20 a owl:ObjectProperty .

pqrc:P20 a owl:ObjectProperty .

prrc:P20 a owl:ObjectProperty .

wdno:P20 a owl:Class ;
	owl:complementOf _:genid2 .

_:genid2 a owl:Restriction ;
	owl:onProperty wdt:P20 ;
	owl:someValuesFrom owl:Thing .

wd:P20 rdfs:label "MusicBrainz place ID"@en .

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix wikibase: <http://wikiba.se/ontology-beta#> .
@prefix wdata: <http://localhost/daniel/wikidata/index.php/Special:EntityData/> .
@prefix wd: <http://www.wikidata.org/entity/> .
@prefix wds: <http://www.wikidata.org/entity/statement/> .
@prefix wdref: <http://www.wikidata.org/reference/> .
@prefix wdv: <http://www.wikidata.org/value/> .
@prefix wdt: <http://www.wikidata.org/prop/direct/> .
@prefix p: <http://www.wikidata.org/prop/> .
@prefix ps: <http://www.wikidata.org/prop/statement/> .
@prefix psv: <http://www.wikidata.org/prop/statement/value/> .
@prefix psn: <http://www.wikidata.org/prop/statement/value-normalized/> .
@prefix pq: <http://www.wikidata.org/prop/qualifier/> .
@prefix pqv: <http://www.wikidata.org/prop/qualifier/value/> .
@prefix pqn: <http://www.wikidata.org/prop/qualifier/value-normalized/> .
@prefix pr: <http://www.wikidata.org/prop/reference/> .
@prefix prv: <http://www.wikidata.org/prop/reference/value/> .
@prefix prn: <http://www.wikidata.org/prop/reference/value-normalized/> .
@prefix wdno: <http://www.wikidata.org/prop/novalue/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix schema: <http://schema.org/> .
@prefix cc: <http://creativecommons.org/ns#> .
@prefix geo: <http://www.opengis.net/ont/geosparql#> .
@prefix prov: <http://www.w3.org/ns/prov#> .

wd:Q111 a wikibase:Item ;
	rdfs:label "silver"@en ;
	skos:prefLabel "silver"@en ;
	schema:name "silver"@en ;
	wdt:P20 "asdfasdf" .

wd:Q111 p:P20 wds:Q111-5459c580-4b6f-c306-184f-b7fa132b32d8 .

wds:Q111-5459c580-4b6f-c306-184f-b7fa132b32d8 a wikibase:Statement,
		wikibase:BestRank ;
	wikibase:rank wikibase:NormalRank ;
	ps:P20 "asdfasdf" ;
	pq:P30 "qwertyqwerty" ;
	prov:wasDerivedFrom wdref:7335a5598064cd8716cc9e31d164f2803e376b99 .

wdref:7335a5598064cd8716cc9e31d164f2803e376b99 a wikibase:Reference ;
	pr:P40 "zxcvbnzxcvbn" .

wd:P20 a wikibase:Property ;
	wikibase:propertyType <http://wikiba.se/ontology-beta#ExternalId> ;
	wikibase:directClaim wdt:P20 ;
	wikibase:claim p:P20 ;
	wikibase:statementProperty ps:P20 ;
	wikibase:statementValue psv:P20 ;
	wikibase:statementValueNormalized psn:P20 ;
	wikibase:qualifier pq:P20 ;
	wikibase:qualifierValue pqv:P20 ;
	wikibase:qualifierValueNormalized pqn:P20 ;
	wikibase:reference pr:P20 ;
	wikibase:referenceValue prv:P20 ;
	wikibase:referenceValueNormalized prn:P20 ;
	wikibase:novalue wdno:P20 .

p:P20 a owl:ObjectProperty .

psv:P20 a owl:ObjectProperty .

pqv:P20 a owl:ObjectProperty .

prv:P20 a owl:ObjectProperty .

psn:P20 a owl:ObjectProperty .

pqn:P20 a owl:ObjectProperty .

prn:P20 a owl:ObjectProperty .

wdt:P20 a owl:DatatypeProperty .

ps:P20 a owl:DatatypeProperty .

pq:P20 a owl:DatatypeProperty .

pr:P20 a owl:DatatypeProperty .

wdno:P20 a owl:Class ;
	owl:complementOf _:genid2 .

_:genid2 a owl:Restriction ;
	owl:onProperty wdt:P20 ;
	owl:someValuesFrom owl:Thing .

wd:P20 rdfs:label "MusicBrainz place ID"@en .

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