How To Register Rdf Into Neo4J

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Introduction

Install Neosemantics Plugin: Download the Neosemantics (n10s) .jar file from GitHub and place it in the plugins folder of your Neo4j installation.
Create Uniqueness Constraint: Ensure a uniqueness constraint on the property 'uri' of nodes with the label 'Resource' using the command: CREATE CONSTRAINT n10s_unique_uri ON (r:Resource) ASSERT r.uri IS UNIQUE;
Initialize Graph Config: Set up the graph configuration by calling the procedure n10s.graphconfig.init(). This can be done with default settings or customized parameters.
Import RDF Data: Use the n10s.rdf.import.fetch procedure to import RDF data from a URL. The command format is: CALL n10s.rdf.import.fetch(url, format, params).
Handle Multivalued Properties: Configure how to handle multivalued properties by setting the handleMultival parameter in the Graph Config to 'ARRAY' if needed.
Filter Triples: Exclude certain triples during import by specifying a list of predicates in the predicateExclusionList parameter.
Advanced Fetching: For dynamic RDF data, use the payload and headerParams parameters to send HTTP requests with specific headers and payloads.

Download Neosemantics: Obtain the Neosemantics (n10s) .jar file from the official GitHub repository.
Place in Plugins Folder: Move the downloaded .jar file to the plugins directory of your Neo4j installation.
Restart Neo4j: Restart the Neo4j server to load the new plugin.

Initialize Graph Config: Use the command CALL n10s.graphconfig.init() to set up the graph configuration with default settings.
Customize Config: Pass a map of parameters to n10s.graphconfig.init() to customize settings such as handleMultival and handleVocabUris.
Show Config: Use CALL n10s.graphconfig.show to display the current configuration settings.
Drop Config: Remove the current graph configuration with CALL n10s.graphconfig.drop.

Fetch RDF Data: Use the n10s.rdf.import.fetch procedure to import RDF data from a URL. Example: CALL n10s.rdf.import.fetch('file:///path/to/file.rdf', 'RDF/XML').
Inline RDF Data: Use n10s.rdf.import.inline to import RDF data passed as a parameter. Example: CALL n10s.rdf.import.inline(payload, 'N-Triples').
Supported Formats: The import procedures support various RDF serialization formats including Turtle, N-Triples, JSON-LD, RDF/XML, TriG, and N-Quads.

Default Behavior: By default, n10s keeps only one value for multivalued properties, typically the last one read.
Store as Arrays: Set handleMultival to 'ARRAY' in the Graph Config to store multivalued properties as arrays.
Specify Properties: Use the multivalPropList parameter to specify which properties should be stored as arrays.
Example Command: CALL n10s.graphconfig.set({ handleMultival: 'ARRAY', multivalPropList: ['http://example.com/keyword'] }).

Exclude Triples: Use the predicateExclusionList parameter to exclude specific triples during import.
Specify Predicates: Provide a list of full URIs for the predicates to be excluded.
Example Command: CALL n10s.rdf.import.fetch('file:///path/to/file.ttl', 'Turtle', { predicateExclusionList: ['http://example.com/version', 'http://example.com/releaseDate'] }).

Dynamic RDF Data: Use the payload and headerParams parameters to send HTTP requests with specific headers and payloads.
SPARQL Endpoints: Submit SPARQL queries to RDF-producing endpoints using the payload parameter.
Example Command: CALL n10s.rdf.import.fetch('https://example.com/sparql', 'Turtle', { headerParams: { Accept: 'application/turtle' }, payload: 'query=DESCRIBE http://example.com/resource' }).