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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:

Code Block
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":

Code Block
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:

Code Block
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" }