SPARQL object prediction example - Amazon Neptune
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SPARQL object prediction example

Object prediction predicts the object value for a given subject and predicate.

The following object-prediction query seeks to predict what movie the input of type foaf:Person would like:

?x a foaf:Person . ?x <http://www.example.org/likes> ?m . ?m a <http://www.example.org/movie> . ## Query SELECT * WHERE { ?input a foaf:Person . SERVICE neptune-ml:inference { neptune-ml:config neptune-ml:modelType 'OBJECT_PREDICTION' ; neptune-ml:input ?input ; neptune-ml:predicate <http://www.example.org/likes> ; neptune-ml:output ?output ; neptune-ml:outputClass <http://www.example.org/movie> . } }

The query itself could be customized as follows:

SELECT * WHERE { ?input a foaf:Person . SERVICE neptune-ml:inference { neptune-ml:config neptune-ml:endpoint 'node-prediction-user-movie-prediction-endpoint' ; neptune-ml:iamRoleArn 'arn:aws:iam::0123456789:role/sagemaker-role' ; neptune-ml:limit "5"^^xsd:integer ; neptune-ml:batchSize "40"^^xsd:integer ; neptune-ml:threshold "0.1"^^xsd:double ; neptune-ml:timeout "1000"^^xsd:integer ; neptune-ml:outputScore ?score ; neptune-ml:modelType 'OBJECT_PREDICTION' ; neptune-ml:input ?input ; neptune-ml:predicate <http://www.example.org/likes> ; neptune-ml:output ?output ; neptune-ml:outputClass <http://www.example.org/movie> . } }