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F4 alpha 2

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Excerpt
This page provides detailed steps for creating repository content via the REST API, and SPARQL queries to demonstrate that content in the triplestorehas been synchronized to an external triplestore. For more details on setting up triplestore sync, see External Triplestore. Much more information about the REST API is available at: RESTful HTTP API and Another Take on the REST API .

1. Finding

...

Containers by

...

Binary Name or MIME Type

Create a few sample objects containers with either a PDF or a text file, or both attached as datastreams binaries (these the following commands assume you have two files named test.pdf and test.txt in your current working directory, ; please substitute working filenames as needed):

Code Block

title	File: objectcontainer-indexing.rdf

PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX indexing: <http://fedora.info/definitions/v4/indexing#>
DELETE { }
INSERT { 
  <> indexing:hasIndexingTransformation "default";
  rdf:type indexing:indexable }
WHERE { }

Code Block

language	bash
title	1a. Creating Sample ObjectsContainers

curl -X POSTPUT -H "Content-type: application/sparql"http://localhost:8080/rest/objects/101"
curl -X PATCH -H "Content-type: application/sparql-update" --data-binary "@object-indexing.rdf" "http://localhost:8080/rest/objects/101"
curl -X POSTPUT -H "Content-type: application/pdf" --data-binary "@test.pdf" "http://localhost:8080/rest/objects/101/master/fcr:content"
curl -X POSTPATCH -H "Content-type: application/sparql-update" --data-binary "@object-indexing.rdf" "http://localhost:8080/rest/objects/102/101/master/fcr:metadata"
curl -X POST -HPUT "Content-typehttp: text/plain" --data-binary "@test.txt" "http://localhost:8080/rest/objects/102/master/fcr:content"
curl -X POSTPATCH -H "Content-type: application/sparql-update" --data-binary "@object-indexing.rdf" "http://localhost:8080/rest/objects/103102"
curl -X POSTPUT -H "Content-type: applicationtext/pdfplain" --data-binary "@test.pdftxt" "http://localhost:8080/rest/objects/103102/master/fcr:content"
curl -X POSTPATCH -H "Content-type: textapplication/plainsparql-update" --data-binary "@test@object-indexing.txtrdf" "http://localhost:8080/rest/objects/103102/textmaster/fcr:content"

Find objects with a datastream named "text":

Code Block

language	sql
title	1b. Selecting Objects With Datastreams 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)=concat(str(?object),'/text')) }

Expected Results

...

metadata"
curl -X PUT "http://localhost:8080/rest/objects/103"
curl -X PATCH -H "Content-type: application/sparql-update" --data-binary "@object-indexing.rdf" "http://localhost:8080/rest/objects/103

...

Find objects with a PDF datastream:

Code Block

language	sql
title	1c. Selecting Objects With PDF Datastreams

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" }

Expected Results

...

"
curl -X PUT -H "Content-type: application/pdf" --data-binary "@test.pdf" "http://localhost:8080/rest/objects/103/master"
curl -X PUT -H "Content-type: text/plain" --data-binary "@test.txt" "http://localhost:8080/rest/objects/103/text"
curl -X PATCH -H "Content-type: application/sparql-update" --data-binary "@object-indexing.rdf" "http://localhost:8080/rest/objects/

...

2. Attach metadata properties directly to objects

Create an object and attach the dc:title property:

Code Block

language	bash
title	2a. Creating Sample Objects

curl -X POST 103/master/fcr:metadata"
curl -X PATCH -H "Content-type: application/sparql-update" --data-binary "@object-indexing.rdf" "http://localhost:8080/rest/objects/201
echo "prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-103/text/fcr:metadata"

Find containers with a binary named "text":

Code Block

language	sql
title	1b. Selecting Containers With Binaries Named "text"

prefix fcrepons#> prefix index: <http://fedora.info/definitions/v4/indexing#>repository#>
select ?object insert data { <> rdf:type index:indexable . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/201
echo "prefix dc: <http://purl.org/dc/elements/1.1/> insert data { <http://localhost:8080/rest/objects/201> dc:title 'Foo' . }" \
| curl -X PATCH --upload-file - where { 
    ?ds fcrepo:mixinTypes "fedora:NonRdfSourceDescription" .
    ?ds fcrepo:hasParent ?object . 
    filter(str(?ds)=concat(str(?object),'/text/fcr:metadata')) 
}

Expected Results

container
<http://localhost:8080/rest/objects/

...

103>

Find objects containers with titlesa PDF binary:

Code Block

language	sql
title	2b1c. Selecting Objects Containers With TitlesPDF Binaries

prefix dcfcrepo: <http://purl.org/dc/elements/1.1fedora.info/definitions/v4/repository#>
prefix relation: <http://www.iana.org/assignments/relation/>
select ?object ?title where { 
    ?object dc:title ?title ds fcrepo:mixinTypes "fedora:NonRdfSourceDescription" .
    ?ds fcrepo:hasParent ?object . 
    ?ds relation:describes ?content .
    ?content fcrepo:mimeType "application/pdf" 
}

Expected Results

object	titlecontainer
<http://localhost:8080/rest/objects/201>	"Foo"

3. Find Objects By Collection Membership

101>

<http://localhost:8080/rest/objects/103>

2. Attach metadata properties directly to containers

Create an container and attach the dc:title propertyCreate three objects and three collections:

Code Block

language	bash
title	3a. Creating Sample Objects And Collections	2a. Creating Sample Containers

curl -X PUT http://localhost:8080/rest/objects/201
echo "prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> prefix index: <http://fedora.info/definitions/v4/indexing#>  insert data { <> rdf:type index:indexable . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/201
echo "prefix dc: <http://purl.org/dc/elements/1.1/> insert data { <http://localhost:8080/rest/objects/201> dc:title 'Foo' . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/201

Find containers with titles:

Code Block

language	sql
title	2b. Selecting Containers With Titles

prefix dc: <http://purl.org/dc/elements/1.1/>
select ?object ?title where { ?object dc:title ?title }

Expected Results

container	title
<http://localhost:8080/rest/objects/201>	"Foo"

3. Find Containers By Collection Membership

Create three containers and three collections:

Code Block

language	bash
title	3a. Creating Sample Containers And Collections

curl -X PUT http://localhost:8080/rest/objects/col1
curl -X PUT http://localhost:8080/rest/objects/col2
curl -X PUT http://localhost:8080/rest/objects/col3
curl -X PUT http://localhost:8080/rest/objects/obj1
curl -X PUT http://localhost:8080/rest/objects/obj2
curl -X PUT http://localhost:8080/rest/objects/obj3

Mark the containers indexable:

Code Block

language	bash
title	3b. Marking containers indexable

echo "insert data { <> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://fedora.info/definitions/v4/indexing#indexable> . }" \
| curl -X PATCH --upload-file -curl -X POST http://localhost:8080/rest/objects/col1
curl -X POST http://localhost:8080/rest/objects/col2
obj1
echo "insert data { <> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://fedora.info/definitions/v4/indexing#indexable> . }" \
| curl -X POSTPATCH --upload-file - http://localhost:8080/rest/objects/col3
curl -X POST http://localhost:8080/rest/objects/obj1
curl -X POST http://localhost:8080/rest/objects/obj2
curl -X POST http://localhost:8080/rest/objects/obj3

Mark the objects indexable:

Code Block

language	bash
title	3b. Marking objects indexable

echo "prefix rdf:obj2
echo "insert data { <> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://fedora.info/definitions/v4/indexing#indexable> . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/obj3
echo "insert data { <> <http://www.w3.org/1999/02/22-rdf-syntax-ns#> prefix index: <http://fedora.info/definitions/v4/indexing#>  insert data { <> rdf:type index:indexablens#type> <http://fedora.info/definitions/v4/indexing#indexable> . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/obj1col1
echo "prefix rdf:insert data { <> <http://www.w3.org/1999/02/22-rdf-syntax-ns#> prefix index: <http://fedora.info/definitions/v4/indexing#>  insert data { <> rdf:type index:indexablens#type> <http://fedora.info/definitions/v4/indexing#indexable> . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/obj2col2
echo "prefix rdf:insert data { <> <http://www.w3.org/1999/02/22-rdf-syntax-ns#> prefix index:ns#type> <http://fedora.info/definitions/v4/indexing#>  insert data { <> rdf:type index:indexable indexing#indexable> . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/obj3col3

Link each object container to a collection:

Code Block

language	bash
title	3c. Linking Objects Containers To Collections

echo 'insert data { <http://localhost:8080/rest/objects/obj1> <http://fedora.info/definitions/v4/some-vocabulary.org/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/some-vocabulary.org/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/v4some-vocabulary.org/rels-ext#isMemberOfCollection> <http://localhost:8080/rest/objects/col3> . }' | curl -X PATCH --upload-file - http://localhost:8080/rest/objects/obj3

...

Code Block

language	bash
title	3d. Linking Collections In A Hierarchy

echo 'insert data { <http://localhost:8080/rest/objects/col1> <http://fedorasome-vocabulary.infoorg/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/some-vocabulary.org/rels-ext#hasPart> <http://localhost:8080/rest/objects/col3> . }' | curl -X PATCH --upload-file - http://localhost:8080/rest/objects/col2

Find objects containers directly attached to a collection:

Code Block

language	sql
title	3e. Selecting Objects Containers Directly Linked To A Collection

select ?obj ?col where { ?obj <http://fedora.info/definitions/v4some-vocabulary.org/rels-ext#isMemberOfCollection> ?col }

...

obj	col
<http://localhost:8080/rest/objects/obj1>	<http://localhost:8080/rest/objects/col1>
<http://localhost:8080/rest/objects/obj2>	<http://localhost:8080/rest/objects/col2>
<http://localhost:8080/rest/objects/obj3>	<http://localhost:8080/rest/objects/col3>

Anchor

	walk
	walk

Find objects containers directly or indirectly attached (recursive retrieval along the rels:hasPart chain). Applications developed using Fedora 3 may use Mulgara's walk() function for queries that navigate a hierarchy. That functionality is now part of standard SPARQL 1.1 (Jena's property paths documentation provides some good examples).

Code Block

language	sql
title	3f. Select Objects Containers Directly Or Indirectly Linked To A Collection

prefix rels: <http://fedora.info/definitions/v4/rels-ext#>
select ?obj where {
  { ?obj rels:isMemberOfCollection <http://localhost:8080/rest/objects/col1> }
  UNION/some-vocabulary.org/rels-ext#>
select ?obj where {
  { <http://localhost:8080/rest/objects/col1> rels:hasPart+* ?col
  . ?obj rels:isMemberOfCollection ?col }
}

Expected Results

objcontainers
<http://localhost:8080/rest/objects/obj1>
<http://localhost:8080/rest/objects/obj2>
<http://localhost:8080/rest/objects/obj3>

Also link an object a container to a project:

Code Block

language	bash
title	3g. Select Objects Directly Or Indirectly Linked Link Containers To A CollectionProject

curl -X POSTPUT http://localhost:8080/rest/objects/proj1
echo "prefix rdf:insert data { <> <http://www.w3.org/1999/02/22-rdf-syntax-ns#> prefix index:ns#type> <http://fedora.info/definitions/v4/indexing#>  insert data { <> rdf:type index:indexable indexing#indexable> . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/proj1
echo '"prefix ex: <http://example.org/> insert data { <http://localhost:8080/rest/objects/obj1> ex:project <http://localhost:8080/rest/objects/proj1> . }" \
| curl -X PATCH --upload-file - http://localhost:8080/rest/objects/obj1

Find objects containers in a collection or linked to a project:

Code Block

language	sql
title	3h. Select Objects Containers Linked To A Collection or A Project

prefix rels: <http://fedora.info/definitions/v4/some-vocabulary.org/rels-ext#>
prefix ex: <http://example.org/>
select ?obj where {
  { ?obj ex:project <http://localhost:8080/rest/objects/proj1> }
  UNION
  { ?obj rels:isMemberOfCollection <http://localhost:8080/rest/objects/col2> }
 }

Expected Results

obj
<http://localhost:8080/rest/objects/obj1>
<http://localhost:8080/rest/objects/obj2>

Count objects containers instead of listing them:

Code Block

language	sql
title	3i. Count the Objects Containers Linked to a Collection or a Project

prefix rels: <http://fedora.info/definitions/v4some-vocabulary.org/rels-ext#>
prefix ex: <http://example.org/>
select (count(distinct ?obj) as ?count) where {
  { ?obj ex:project <http://localhost:8080/rest/objects/proj1> }
  UNION
  { ?obj rels:isMemberOfCollection <http://localhost:8080/rest/objects/col2> }
}

...

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Key

1. Finding

Containers by

Binary Name or MIME Type

Expected Results

Expected Results

2. Attach metadata properties directly to objects

Expected Results

Expected Results

3. Find Objects By Collection Membership

2. Attach metadata properties directly to containers

Expected Results

3. Find Containers By Collection Membership

Expected Results

Expected Results