How to add conditions to a query
I would like to add a condition to a query, so that, if a result is empty, it fills it with a result of another query.
For example : If a owl:Class has no "skos:definition", I would like to replace it by a "rdfs:comment"
Is this possible ?
Thank you !
sparql
asked Nov 13 '18 at 8:16
SkeepySkeepy
214
add a comment |
I would like to add a condition to a query, so that, if a result is empty, it fills it with a result of another query.
For example : If a owl:Class has no "skos:definition", I would like to replace it by a "rdfs:comment"
Is this possible ?
Thank you !
sparql
asked Nov 13 '18 at 8:16
SkeepySkeepy
214
2
select ?class ?description { ?class a owl:Class . optional { ?class skos:definition ?definition } optional { ?class rdfs:comment ?comment } bind (coalesce(?definition, ?comment) as ?description) }.
– Stanislav Kralin
Nov 13 '18 at 8:22
orbind (if(bound(?definition), ?definition, ?comment) as ?description).
– Stanislav Kralin
Nov 13 '18 at 8:26
Oups... didn't see the answers... Ok for the BIND solution. Thank you all !
– Skeepy
Nov 13 '18 at 10:09
add a comment |
I would like to add a condition to a query, so that, if a result is empty, it fills it with a result of another query.
For example : If a owl:Class has no "skos:definition", I would like to replace it by a "rdfs:comment"
Is this possible ?
Thank you !
sparql
asked Nov 13 '18 at 8:16
SkeepySkeepy
214
I would like to add a condition to a query, so that, if a result is empty, it fills it with a result of another query.
For example : If a owl:Class has no "skos:definition", I would like to replace it by a "rdfs:comment"
Is this possible ?
Thank you !
sparql
sparql
asked Nov 13 '18 at 8:16
SkeepySkeepy
214
asked Nov 13 '18 at 8:16
SkeepySkeepy
214
asked Nov 13 '18 at 8:16
SkeepySkeepy
214
asked Nov 13 '18 at 8:16
SkeepySkeepy
214
asked Nov 13 '18 at 8:16
SkeepySkeepy
214
214
2
select ?class ?description { ?class a owl:Class . optional { ?class skos:definition ?definition } optional { ?class rdfs:comment ?comment } bind (coalesce(?definition, ?comment) as ?description) }.
– Stanislav Kralin
Nov 13 '18 at 8:22
orbind (if(bound(?definition), ?definition, ?comment) as ?description).
– Stanislav Kralin
Nov 13 '18 at 8:26
Oups... didn't see the answers... Ok for the BIND solution. Thank you all !
– Skeepy
Nov 13 '18 at 10:09
add a comment |
2
select ?class ?description { ?class a owl:Class . optional { ?class skos:definition ?definition } optional { ?class rdfs:comment ?comment } bind (coalesce(?definition, ?comment) as ?description) }.
– Stanislav Kralin
Nov 13 '18 at 8:22
orbind (if(bound(?definition), ?definition, ?comment) as ?description).
– Stanislav Kralin
Nov 13 '18 at 8:26
Oups... didn't see the answers... Ok for the BIND solution. Thank you all !
– Skeepy
Nov 13 '18 at 10:09
2
2
select ?class ?description { ?class a owl:Class . optional { ?class skos:definition ?definition } optional { ?class rdfs:comment ?comment } bind (coalesce(?definition, ?comment) as ?description) }.– Stanislav Kralin
Nov 13 '18 at 8:22
select ?class ?description { ?class a owl:Class . optional { ?class skos:definition ?definition } optional { ?class rdfs:comment ?comment } bind (coalesce(?definition, ?comment) as ?description) }.– Stanislav Kralin
Nov 13 '18 at 8:22
or
bind (if(bound(?definition), ?definition, ?comment) as ?description).– Stanislav Kralin
Nov 13 '18 at 8:26
or
bind (if(bound(?definition), ?definition, ?comment) as ?description).– Stanislav Kralin
Nov 13 '18 at 8:26
Oups... didn't see the answers... Ok for the BIND solution. Thank you all !
– Skeepy
Nov 13 '18 at 10:09
Oups... didn't see the answers... Ok for the BIND solution. Thank you all !
– Skeepy
Nov 13 '18 at 10:09
add a comment |
2 Answers
2
active
oldest
votes
COALESCE is can help, especially as you get more choices from skos:prefLabel, skos:altLabel and more.
OPTIONAL { ?property rdfs:label ?label }
OPTIONAL { ?property skos:definition ?definition .}
# ... other ways to choose ?comment ...
BIND ( COALESCE(?definition, ?label, "Unknown") AS ?comment )
COALESCE allows expressions (unlike BOUND)
https://www.w3.org/TR/sparql11-query/#func-coalesce
answered Nov 13 '18 at 12:17
AndySAndyS
12.8k1117
add a comment |
I found something with BIND (IF(BOUND(...) ..., ...) AS ...) statement.
SELECT DISTINCT ?type ?property ?comment ?propertyType ?domain
WHERE {
?property rens:hasAttributeType ?propertyType .
?property rens:hasForDomain ?domain .
?property rdf:type ?type .
?property rdfs:label ?label .
OPTIONAL {?property skos:definition ?definition .}
BIND(IF(BOUND(?definition), ?definition, ?label) AS ?comment) .
}
Is this the better way ?
edited Nov 13 '18 at 10:15
Stanislav Kralin
7,64041842
answered Nov 13 '18 at 10:08
SkeepySkeepy
214
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
COALESCE is can help, especially as you get more choices from skos:prefLabel, skos:altLabel and more.
OPTIONAL { ?property rdfs:label ?label }
OPTIONAL { ?property skos:definition ?definition .}
# ... other ways to choose ?comment ...
BIND ( COALESCE(?definition, ?label, "Unknown") AS ?comment )
COALESCE allows expressions (unlike BOUND)
https://www.w3.org/TR/sparql11-query/#func-coalesce
answered Nov 13 '18 at 12:17
AndySAndyS
12.8k1117
add a comment |
COALESCE is can help, especially as you get more choices from skos:prefLabel, skos:altLabel and more.
OPTIONAL { ?property rdfs:label ?label }
OPTIONAL { ?property skos:definition ?definition .}
# ... other ways to choose ?comment ...
BIND ( COALESCE(?definition, ?label, "Unknown") AS ?comment )
COALESCE allows expressions (unlike BOUND)
https://www.w3.org/TR/sparql11-query/#func-coalesce
answered Nov 13 '18 at 12:17
AndySAndyS
12.8k1117
add a comment |
COALESCE is can help, especially as you get more choices from skos:prefLabel, skos:altLabel and more.
OPTIONAL { ?property rdfs:label ?label }
OPTIONAL { ?property skos:definition ?definition .}
# ... other ways to choose ?comment ...
BIND ( COALESCE(?definition, ?label, "Unknown") AS ?comment )
COALESCE allows expressions (unlike BOUND)
https://www.w3.org/TR/sparql11-query/#func-coalesce
answered Nov 13 '18 at 12:17
AndySAndyS
12.8k1117
COALESCE is can help, especially as you get more choices from skos:prefLabel, skos:altLabel and more.
OPTIONAL { ?property rdfs:label ?label }
OPTIONAL { ?property skos:definition ?definition .}
# ... other ways to choose ?comment ...
BIND ( COALESCE(?definition, ?label, "Unknown") AS ?comment )
COALESCE allows expressions (unlike BOUND)
https://www.w3.org/TR/sparql11-query/#func-coalesce
answered Nov 13 '18 at 12:17
AndySAndyS
12.8k1117
answered Nov 13 '18 at 12:17
AndySAndyS
12.8k1117
answered Nov 13 '18 at 12:17
AndySAndyS
12.8k1117
answered Nov 13 '18 at 12:17
AndySAndyS
12.8k1117
12.8k1117
add a comment |
add a comment |
I found something with BIND (IF(BOUND(...) ..., ...) AS ...) statement.
SELECT DISTINCT ?type ?property ?comment ?propertyType ?domain
WHERE {
?property rens:hasAttributeType ?propertyType .
?property rens:hasForDomain ?domain .
?property rdf:type ?type .
?property rdfs:label ?label .
OPTIONAL {?property skos:definition ?definition .}
BIND(IF(BOUND(?definition), ?definition, ?label) AS ?comment) .
}
Is this the better way ?
edited Nov 13 '18 at 10:15
Stanislav Kralin
7,64041842
answered Nov 13 '18 at 10:08
SkeepySkeepy
214
add a comment |
I found something with BIND (IF(BOUND(...) ..., ...) AS ...) statement.
SELECT DISTINCT ?type ?property ?comment ?propertyType ?domain
WHERE {
?property rens:hasAttributeType ?propertyType .
?property rens:hasForDomain ?domain .
?property rdf:type ?type .
?property rdfs:label ?label .
OPTIONAL {?property skos:definition ?definition .}
BIND(IF(BOUND(?definition), ?definition, ?label) AS ?comment) .
}
Is this the better way ?
edited Nov 13 '18 at 10:15
Stanislav Kralin
7,64041842
answered Nov 13 '18 at 10:08
SkeepySkeepy
214
add a comment |
I found something with BIND (IF(BOUND(...) ..., ...) AS ...) statement.
SELECT DISTINCT ?type ?property ?comment ?propertyType ?domain
WHERE {
?property rens:hasAttributeType ?propertyType .
?property rens:hasForDomain ?domain .
?property rdf:type ?type .
?property rdfs:label ?label .
OPTIONAL {?property skos:definition ?definition .}
BIND(IF(BOUND(?definition), ?definition, ?label) AS ?comment) .
}
Is this the better way ?
edited Nov 13 '18 at 10:15
Stanislav Kralin
7,64041842
answered Nov 13 '18 at 10:08
SkeepySkeepy
214
I found something with BIND (IF(BOUND(...) ..., ...) AS ...) statement.
SELECT DISTINCT ?type ?property ?comment ?propertyType ?domain
WHERE {
?property rens:hasAttributeType ?propertyType .
?property rens:hasForDomain ?domain .
?property rdf:type ?type .
?property rdfs:label ?label .
OPTIONAL {?property skos:definition ?definition .}
BIND(IF(BOUND(?definition), ?definition, ?label) AS ?comment) .
}
Is this the better way ?
edited Nov 13 '18 at 10:15
Stanislav Kralin
7,64041842
answered Nov 13 '18 at 10:08
SkeepySkeepy
214
edited Nov 13 '18 at 10:15
Stanislav Kralin
7,64041842
edited Nov 13 '18 at 10:15
Stanislav Kralin
7,64041842
edited Nov 13 '18 at 10:15
Stanislav Kralin
7,64041842
7,64041842
answered Nov 13 '18 at 10:08
SkeepySkeepy
214
answered Nov 13 '18 at 10:08
SkeepySkeepy
214
answered Nov 13 '18 at 10:08
SkeepySkeepy
214
214
add a comment |
add a comment |
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2
select ?class ?description { ?class a owl:Class . optional { ?class skos:definition ?definition } optional { ?class rdfs:comment ?comment } bind (coalesce(?definition, ?comment) as ?description) }.– Stanislav Kralin
Nov 13 '18 at 8:22
or
bind (if(bound(?definition), ?definition, ?comment) as ?description).– Stanislav Kralin
Nov 13 '18 at 8:26
Oups... didn't see the answers... Ok for the BIND solution. Thank you all !
– Skeepy
Nov 13 '18 at 10:09