This page provides detailed steps for creating repository content via the REST API, and SPARQL queries to demonstrate that content in the triplestore. Much more information about the REST API is available at: REST API and Another Take on the REST API.
Finding Objects by Datastream Name or MIME Type
Create a few sample objects with either a PDF or a text file, or both attached as datastreams:
curl -X POST http://localhost:8080/rest/objects/101?mixin=fedora:object
curl -X POST -H "Content-type: application/pdf" --data-binary @test.pdf \
http://localhost:8080/rest/objects/101/master/fcr:content
curl -X POST http://localhost:8080/rest/objects/102?mixin=fedora:object
curl -X POST -H "Content-type: text/plain" --data-binary @test.txt \
http://localhost:8080/rest/objects/102/master/fcr:content
curl -X POST http://localhost:8080/rest/objects/103?mixin=fedora:object
curl -X POST -H "Content-type: application/pdf" --data-binary @test.pdf \
http://localhost:8080/rest/objects/103/master/fcr:content
curl -X POST -H "Content-type: text/plain" --data-binary @test.txt \
http://localhost:8080/rest/objects/103/text/fcr:content
Find objects with a datastream named "text":
prefix fcrepo: <http://fedora.info/definitions/v4/repository#>
select ?object where { ?ds fcrepo:mixinTypes "fedora:datastream" .
?ds fcrepo:hasParent ?object . filter(str(?ds)=str(?object)+'/text') }
Find objects with a PDF datastream:
prefix fcrepo: <http://fedora.info/definitions/v4/repository#>
select ?object where { ?ds fcrepo:mixinTypes "fedora:datastream" .
?ds fcrepo:hasParent ?object . ?ds fcrepo:hasContent ?content .
?content fcrepo:mimeType "application/pdf" }
Attach metadata properties directly to objects
Create an object and attach the dc:title property:
curl -X POST http://localhost:8080/rest/objects/201?mixin=fedora:object
echo "prefix dc: <http://purl.org/dc/terms/>
insert data { <http://localhost:8080/rest/objects/201> dc:title 'Foo' . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/201
Find objects with titles:
prefix dc: <http://purl.org/dc/terms/>
select ?object ?title where { ?object dc:title ?title }
Find Objects By Collection Membership
Create three objects and three collections:
curl -X POST http://localhost:8080/rest/objects/col1?mixin=fedora:object curl -X POST http://localhost:8080/rest/objects/col2?mixin=fedora:object curl -X POST http://localhost:8080/rest/objects/col3?mixin=fedora:object curl -X POST http://localhost:8080/rest/objects/obj1?mixin=fedora:object curl -X POST http://localhost:8080/rest/objects/obj2?mixin=fedora:object curl -X POST http://localhost:8080/rest/objects/obj3?mixin=fedora:object
Link each object to a collection:
echo 'insert data { <http://localhost:8080/rest/objects/obj1> <http://fedora.info/definitions/v4/rels-ext#isMemberOfCollection> <http://localhost:8080/rest/objects/col1> . }' | curl -X PATCH --upload-file - http://localhost:8080/rest/objects/obj1
echo 'insert data { <http://localhost:8080/rest/objects/obj2> <http://fedora.info/definitions/v4/rels-ext#isMemberOfCollection> <http://localhost:8080/rest/objects/col2> . }' | curl -X PATCH --upload-file - http://localhost:8080/rest/objects/obj2
echo 'insert data { <http://localhost:8080/rest/objects/obj3> <http://fedora.info/definitions/v4/rels-ext#isMemberOfCollection> <http://localhost:8080/rest/objects/col3> . }' | curl -X PATCH --upload-file - http://localhost:8080/rest/objects/obj3
Link the collections in a hierarchy:
echo 'insert data { <http://localhost:8080/rest/objects/col1> <http://fedora.info/definitions/v4/rels-ext#hasPart> <http://localhost:8080/rest/objects/col2> . }' | curl -X PATCH --upload-file - http://localhost:8080/rest/objects/col1
echo 'insert data { <http://localhost:8080/rest/objects/col2> <http://fedora.info/definitions/v4/rels-ext#hasPart> <http://localhost:8080/rest/objects/col3> . }' | curl -X PATCH --upload-file - http://localhost:8080/rest/objects/col2
Find objects directly attached to a collection:
select ?obj ?col where { ?obj <http://fedora.info/definitions/v4/rels-ext#isMemberOfCollection> ?col }
Find objects directly or indirectly attached (down to the third level):
prefix rels: <http://fedora.info/definitions/v4/rels-ext#>
select ?obj where {
{?obj rels:isMemberOfCollection <http://localhost:8080/rest/objects/col1>}
UNION
{?obj rels:isMemberOfCollection ?c . <http://localhost:8080/rest/objects/col1> rels:hasPart ?c }
UNION
{?obj rels:isMemberOfCollection ?c . <http://localhost:8080/rest/objects/col1> rels:hasPart ?c1 . ?c1 rels:hasPart ?c }
}
