I'm trying to do a select all query on my friend's dataset. I have some concern about the design of his RDF dataset, as the URI for every client is different. In that case, how is a select all query possible? This is my first time working with RDF, so maybe my guess is wrong.
Here's the data:
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:owl="http://www.w3.org/2002/07/owl#"
xmlns:ontoex="http://www.semanticweb.org/home/ontologies/2016/10/ex#"
xmlns:ex="http://example.com/"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#">
<ontoex:DataRecipient rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#unrelated">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</ontoex:DataRecipient>
<ex:Client rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,">
<ex:hasBdDate>
<ex:BdDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,BdDate">
<ex:hasValue>31/12/2011</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:BdDate>
</ex:hasBdDate>
<ex:hasAge>
<ex:Age rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,Age">
<ex:hasValue>4</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:Age>
</ex:hasAge>
<ex:hasAdress>
<ex:Adress rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,Adress">
<ex:hasValue>ergdrg</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:Adress>
</ex:hasAdress>
<ex:hasIdentityCard>
<ex:IdentityCard rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,IdentityCard">
<ex:hasNumber>
<ex:IdentityCardNumber rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,IdentityCardNumber">
<ex:hasValue>10521</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:IdentityCardNumber>
</ex:hasNumber>
<ex:hasExpirationDate>
<ex:IdentityCardExpirationDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,IdentityCardExpirationDate">
<ex:hasValue>14/12/2018</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:IdentityCardExpirationDate>
</ex:hasExpirationDate>
<ex:hasDeliveryDate>
<ex:IdentityCardDeliveryDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,IdentityCardDeliveryDate">
<ex:hasValue>12/12/2014</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:IdentityCardDeliveryDate>
</ex:hasDeliveryDate>
</ex:IdentityCard>
</ex:hasIdentityCard>
<ex:hasPassPort>
<ex:PassPort rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,PassPort">
<ex:hasNumber>
<ex:PassPortNumber rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,PassPortNumber">
<ex:hasValue></ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:PassPortNumber>
</ex:hasNumber>
<ex:hasExpirationDate>
<ex:PassPortExpirationDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,PassPortExpirationDate">
<ex:hasValue></ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:PassPortExpirationDate>
</ex:hasExpirationDate>
<ex:hasDeliveryDate>
<ex:PassPortDeliveryDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#ergergghbjk,PassPortDeliveryDate">
<ex:hasValue></ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:PassPortDeliveryDate>
</ex:hasDeliveryDate>
</ex:PassPort>
</ex:hasPassPort>
<ex:hasService>
<ontoex:LandTransportationService rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#BuyBusTicket">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</ontoex:LandTransportationService>
</ex:hasService>
</ex:Client>
<ex:Client rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#Taleb">
<ex:hasPassPort>
<ex:PassPort rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebPassPort">
<ex:hasDeliveryDate>
<ex:PassPortDeliveryDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebPassPortDeliveryDate">
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasValue></ex:hasValue>
</ex:PassPortDeliveryDate>
</ex:hasDeliveryDate>
<ex:hasExpirationDate>
<ex:PassPortExpirationDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebPassPortExpirationDate">
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasValue></ex:hasValue>
</ex:PassPortExpirationDate>
</ex:hasExpirationDate>
<ex:hasNumber>
<ex:PassPortNumber rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebPassPortNumber">
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasValue></ex:hasValue>
</ex:PassPortNumber>
</ex:hasNumber>
</ex:PassPort>
</ex:hasPassPort>
<ex:hasIdentityCard>
<ex:IdentityCard rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebIdentityCard">
<ex:hasDeliveryDate>
<ex:IdentityCardDeliveryDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebIdentityCardDeliveryDate">
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasValue>20/12/2013</ex:hasValue>
</ex:IdentityCardDeliveryDate>
</ex:hasDeliveryDate>
<ex:hasExpirationDate>
<ex:IdentityCardExpirationDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebIdentityCardExpirationDate">
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasValue>18/12/2020</ex:hasValue>
</ex:IdentityCardExpirationDate>
</ex:hasExpirationDate>
<ex:hasNumber>
<ex:IdentityCardNumber rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebIdentityCardNumber">
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasValue>561</ex:hasValue>
</ex:IdentityCardNumber>
</ex:hasNumber>
</ex:IdentityCard>
</ex:hasIdentityCard>
<ex:hasAdress>
<ex:Adress rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebAdress">
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasValue>binjk,l</ex:hasValue>
</ex:Adress>
</ex:hasAdress>
<ex:hasAge>
<ex:Age rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebAge">
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasValue>2</ex:hasValue>
</ex:Age>
</ex:hasAge>
<ex:hasBdDate>
<ex:BdDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#TalebBdDate">
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasValue>20/12/2013</ex:hasValue>
</ex:BdDate>
</ex:hasBdDate>
</ex:Client>
<ontoex:DataPurpose rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#contact">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</ontoex:DataPurpose>
<ex:Client rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#Djamel">
<ex:hasFirstName>
<ex:FirstName rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelFirstName">
<ex:hasValue>Nom</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:FirstName>
</ex:hasFirstName>
<ex:hasLastName>
<ex:LastName rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelLastName">
<ex:hasValue>Prenom</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:LastName>
</ex:hasLastName>
<ex:hasIdentityCard>
<ex:IdentityCard rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelIdentityCard">
<ex:hasNumber>
<ex:IdentityCardNumber rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelIdentityCardNumber">
<ex:hasValue>95175364</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:IdentityCardNumber>
</ex:hasNumber>
<ex:hasExpirationDate>
<ex:IdentityCardExpirationDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelIdentityCardExpirationDate">
<ex:hasValue>11/06/2021</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:IdentityCardExpirationDate>
</ex:hasExpirationDate>
<ex:hasDeliveryDate>
<ex:IdentityCardDeliveryDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelIdentityCardDeliveryDate">
<ex:hasValue>10/06/2016</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:IdentityCardDeliveryDate>
</ex:hasDeliveryDate>
</ex:IdentityCard>
</ex:hasIdentityCard>
<ex:hasDriverLicense>
<ex:DriverLicense rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelDriverLicense">
<ex:hasNumber>
<ex:DriverLicenseNumber rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelDriverLicenseNumber">
<ex:hasValue>0123456789</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:DriverLicenseNumber>
</ex:hasNumber>
<ex:hasExpirationDate>
<ex:DriverLicenseExpirationDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelDriverLicenseExpirationDate">
<ex:hasValue>19/06/2024</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:DriverLicenseExpirationDate>
</ex:hasExpirationDate>
<ex:hasDeliveryDate>
<ex:DriverLicenseDeliveryDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelDriverLicenseDeliveryDate">
<ex:hasValue>13/06/2014</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:DriverLicenseDeliveryDate>
</ex:hasDeliveryDate>
</ex:DriverLicense>
</ex:hasDriverLicense>
<ex:hasPassPort>
<ex:PassPort rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelPassPort">
<ex:hasNumber>
<ex:PassPortNumber rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelPassPortNumber">
<ex:hasValue>987654321</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:PassPortNumber>
</ex:hasNumber>
<ex:hasExpirationDate>
<ex:PassPortExpirationDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelPassPortExpirationDate">
<ex:hasValue>11/06/2026</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:PassPortExpirationDate>
</ex:hasExpirationDate>
<ex:hasDeliveryDate>
<ex:PassPortDeliveryDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelPassPortDeliveryDate">
<ex:hasValue>25/06/2016</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:PassPortDeliveryDate>
</ex:hasDeliveryDate>
</ex:PassPort>
</ex:hasPassPort>
<ex:hasAdress>
<ex:Adress rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelAdress">
<ex:hasValue>Mon Adresse</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:Adress>
</ex:hasAdress>
<ex:hasCreditCard>
<ex:CreditCard rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelCreditCard">
<ex:hasNumber>
<rdf:Description rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelCreditCardNumber">
<ex:hasValue>123456789</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</rdf:Description>
</ex:hasNumber>
<ex:hasCCType>
<ex:CCType rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelCCType">
<ex:hasValue>Visa</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:CCType>
</ex:hasCCType>
</ex:CreditCard>
</ex:hasCreditCard>
<ex:hasBdDate>
<ex:BdDate rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelBdDate">
<ex:hasValue>19/06/1991</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:BdDate>
</ex:hasBdDate>
<ex:hasAge>
<ex:Age rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#DjamelAge">
<ex:hasValue>25</ex:hasValue>
<ex:hasRetention rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#no-retention"/>
<ex:hasRecipient rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#ours"/>
<ex:hasPurpose rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#current"/>
</ex:Age>
</ex:hasAge>
<ex:hasService rdf:resource="http://www.semanticweb.org/home/ontologies/2016/10/ex#RentVehicle"/>
</ex:Client>
</rdf:RDF>
In summary, we have
<ex:Client rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#Taleb">
<ex:Client rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#Djamel">
We want to get all data about Taleb and Djamel. Beyond that, how can I write a similar query when there are more than two clients?
It's great that you shared your data. I made some edits, because it wasn't complete RDF as posted:
<rdf:RDF> tagsAdditionally
rdfs:labels to all of your entities like <http://www.semanticweb.org/home/ontologies/2016/10/ex#Djamel>hasValue object of DjamelFirstName is Nom, not Djamel. Is this a case of label/value confusion?Here's a SO answer listing some training materials you could try.
And here's a fragment of your data, in Turtle format, and with labels:
@prefix ex: <http://www.semanticweb.org/home/ontologies/2016/10/ex#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@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#> .
ex:DjamelFirstName a ex:FirstName ;
rdfs:label "Djamel's first name" ;
ex:hasPurpose ex:current ;
ex:hasRecipient ex:ours ;
ex:hasRetention ex:no-retention ;
ex:hasValue "Nom" .
ex:Djamel a ex:Client ;
rdfs:label "Client 'Djamel'" ;
ex:hasAdress ex:DjamelAdress ;
ex:hasAge ex:DjamelAge ;
ex:hasBdDate ex:DjamelBdDate ;
ex:hasCreditCard ex:DjamelCreditCard ;
ex:hasDriverLicense ex:DjamelDriverLicense ;
ex:hasFirstName ex:DjamelFirstName ;
ex:hasIdentityCard ex:DjamelIdentityCard ;
ex:hasLastName ex:DjamelLastName ;
ex:hasPassPort ex:DjamelPassPort ;
ex:hasService ex:RentVehicle .
The last two lines of your question provide a hint towards the answer: if you want to find information about two instances of the RDF same class (ex:Client), you should ask for all members of that class.
<ex:Client rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#Taleb">
<ex:Client rdf:about="http://www.semanticweb.org/home/ontologies/2016/10/ex#Djamel">
That's where the ?s a ex:Client part of the query comes from.
Your data model looks generally reasonable to me, but you'll have to deal with the fact that it is nested. For example, ex:Djamel doesn't have a direct relationship with a string literal representing his(?) name.
I have written a query that goes down one level of nesting. If your data actually use deeper nesting, you'll need to modify the query.
PREFIX ex: <http://www.semanticweb.org/home/ontologies/2016/10/ex#>
SELECT *
WHERE
{ ?s a ex:Client .
?s ?p1 ?o1 .
OPTIONAL
{ ?o1 ?p2 ?o2 } .
}
gives
+-----------------+-------------------------------------------------+-----------------------------+-------------------------------------------------+-----------------------------------------------+
| s | p1 | o1 | p2 | o2 |
+-----------------+-------------------------------------------------+-----------------------------+-------------------------------------------------+-----------------------------------------------+
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | ex:hasValue | Nom |
| ex:Djamel | ex:hasFirstName | ex:DjamelFirstName | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:FirstName |
| ex:Djamel | ex:hasIdentityCard | ex:DjamelIdentityCard | ex:hasDeliveryDate | ex:DjamelIdentityCardDeliveryDate |
| ex:Djamel | ex:hasIdentityCard | ex:DjamelIdentityCard | ex:hasExpirationDate | ex:DjamelIdentityCardExpirationDate |
| ex:Djamel | ex:hasIdentityCard | ex:DjamelIdentityCard | ex:hasNumber | ex:DjamelIdentityCardNumber |
| ex:Djamel | ex:hasIdentityCard | ex:DjamelIdentityCard | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:IdentityCard |
| ex:Djamel | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Class |
| ex:Djamel | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Resource |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | ex:hasValue | Mon Adresse |
| ex:Djamel | ex:hasAdress | ex:DjamelAdress | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Adress |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | ex:hasValue | 19/06/1991 |
| ex:Djamel | ex:hasBdDate | ex:DjamelBdDate | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:BdDate |
| ex:Djamel | ex:hasCreditCard | ex:DjamelCreditCard | ex:hasCCType | ex:DjamelCCType |
| ex:Djamel | ex:hasCreditCard | ex:DjamelCreditCard | ex:hasNumber | ex:DjamelCreditCardNumber |
| ex:Djamel | ex:hasCreditCard | ex:DjamelCreditCard | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:CreditCard |
| ex:Djamel | ex:hasPassPort | ex:DjamelPassPort | ex:hasDeliveryDate | ex:DjamelPassPortDeliveryDate |
| ex:Djamel | ex:hasPassPort | ex:DjamelPassPort | ex:hasExpirationDate | ex:DjamelPassPortExpirationDate |
| ex:Djamel | ex:hasPassPort | ex:DjamelPassPort | ex:hasNumber | ex:DjamelPassPortNumber |
| ex:Djamel | ex:hasPassPort | ex:DjamelPassPort | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:PassPort |
| ex:Djamel | ex:hasDriverLicense | ex:DjamelDriverLicense | ex:hasDeliveryDate | ex:DjamelDriverLicenseDeliveryDate |
| ex:Djamel | ex:hasDriverLicense | ex:DjamelDriverLicense | ex:hasExpirationDate | ex:DjamelDriverLicenseExpirationDate |
| ex:Djamel | ex:hasDriverLicense | ex:DjamelDriverLicense | ex:hasNumber | ex:DjamelDriverLicenseNumber |
| ex:Djamel | ex:hasDriverLicense | ex:DjamelDriverLicense | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:DriverLicense |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | ex:hasValue | Prenom |
| ex:Djamel | ex:hasLastName | ex:DjamelLastName | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:LastName |
| ex:Djamel | ex:hasService | ex:RentVehicle | NA | NA |
| ex:Djamel | ex:hasAge | ex:DjamelAge | ex:hasPurpose | ex:current |
| ex:Djamel | ex:hasAge | ex:DjamelAge | ex:hasRecipient | ex:ours |
| ex:Djamel | ex:hasAge | ex:DjamelAge | ex:hasRetention | ex:no-retention |
| ex:Djamel | ex:hasAge | ex:DjamelAge | ex:hasValue | 25 |
| ex:Djamel | ex:hasAge | ex:DjamelAge | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Age |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | ex:hasPurpose | ex:current |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | ex:hasRecipient | ex:ours |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | ex:hasRetention | ex:no-retention |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | ex:hasValue | ergdrg |
| ex:ergergghbjk_ | ex:hasAdress | ex:ergergghbjk_Adress | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Adress |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | ex:hasPurpose | ex:current |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | ex:hasRecipient | ex:ours |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | ex:hasRetention | ex:no-retention |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | ex:hasValue | 4 |
| ex:ergergghbjk_ | ex:hasAge | ex:ergergghbjk_Age | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Age |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | ex:hasPurpose | ex:current |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | ex:hasRecipient | ex:ours |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | ex:hasRetention | ex:no-retention |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | ex:hasValue | 31/12/2011 |
| ex:ergergghbjk_ | ex:hasBdDate | ex:ergergghbjk_BdDate | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:BdDate |
| ex:ergergghbjk_ | ex:hasIdentityCard | ex:ergergghbjk_IdentityCard | ex:hasDeliveryDate | ex:ergergghbjk_IdentityCardDeliveryDate |
| ex:ergergghbjk_ | ex:hasIdentityCard | ex:ergergghbjk_IdentityCard | ex:hasExpirationDate | ex:ergergghbjk_IdentityCardExpirationDate |
| ex:ergergghbjk_ | ex:hasIdentityCard | ex:ergergghbjk_IdentityCard | ex:hasNumber | ex:ergergghbjk_IdentityCardNumber |
| ex:ergergghbjk_ | ex:hasIdentityCard | ex:ergergghbjk_IdentityCard | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:IdentityCard |
| ex:ergergghbjk_ | ex:hasPassPort | ex:ergergghbjk_PassPort | ex:hasDeliveryDate | ex:ergergghbjk_PassPortDeliveryDate |
| ex:ergergghbjk_ | ex:hasPassPort | ex:ergergghbjk_PassPort | ex:hasExpirationDate | ex:ergergghbjk_PassPortExpirationDate |
| ex:ergergghbjk_ | ex:hasPassPort | ex:ergergghbjk_PassPort | ex:hasNumber | ex:ergergghbjk_PassPortNumber |
| ex:ergergghbjk_ | ex:hasPassPort | ex:ergergghbjk_PassPort | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:PassPort |
| ex:ergergghbjk_ | ex:hasService | ex:BuyBusTicket | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2002/07/owl#NamedIndividual |
| ex:ergergghbjk_ | ex:hasService | ex:BuyBusTicket | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:LandTransportationService |
| ex:ergergghbjk_ | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Class |
| ex:ergergghbjk_ | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Resource |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | ex:hasPurpose | ex:current |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | ex:hasRecipient | ex:ours |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | ex:hasRetention | ex:no-retention |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | ex:hasValue | binjk,l |
| ex:Taleb | ex:hasAdress | ex:TalebAdress | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Adress |
| ex:Taleb | ex:hasAge | ex:TalebAge | ex:hasPurpose | ex:current |
| ex:Taleb | ex:hasAge | ex:TalebAge | ex:hasRecipient | ex:ours |
| ex:Taleb | ex:hasAge | ex:TalebAge | ex:hasRetention | ex:no-retention |
| ex:Taleb | ex:hasAge | ex:TalebAge | ex:hasValue | 2 |
| ex:Taleb | ex:hasAge | ex:TalebAge | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Age |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | ex:hasPurpose | ex:current |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | ex:hasRecipient | ex:ours |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | ex:hasRetention | ex:no-retention |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | ex:hasValue | 20/12/2013 |
| ex:Taleb | ex:hasBdDate | ex:TalebBdDate | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:BdDate |
| ex:Taleb | ex:hasIdentityCard | ex:TalebIdentityCard | ex:hasDeliveryDate | ex:TalebIdentityCardDeliveryDate |
| ex:Taleb | ex:hasIdentityCard | ex:TalebIdentityCard | ex:hasExpirationDate | ex:TalebIdentityCardExpirationDate |
| ex:Taleb | ex:hasIdentityCard | ex:TalebIdentityCard | ex:hasNumber | ex:TalebIdentityCardNumber |
| ex:Taleb | ex:hasIdentityCard | ex:TalebIdentityCard | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:IdentityCard |
| ex:Taleb | ex:hasPassPort | ex:TalebPassPort | ex:hasDeliveryDate | ex:TalebPassPortDeliveryDate |
| ex:Taleb | ex:hasPassPort | ex:TalebPassPort | ex:hasExpirationDate | ex:TalebPassPortExpirationDate |
| ex:Taleb | ex:hasPassPort | ex:TalebPassPort | ex:hasNumber | ex:TalebPassPortNumber |
| ex:Taleb | ex:hasPassPort | ex:TalebPassPort | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:PassPort |
| ex:Taleb | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Class |
| ex:Taleb | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | ex:Client | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://www.w3.org/2000/01/rdf-schema#Resource |
+-----------------+-------------------------------------------------+-----------------------------+-------------------------------------------------+-----------------------------------------------+