sparql-ingest-processor-ts

TypeScript RDF-Connect processor for ingesting SDS records or in general, a stream of RDF quads into a SPARQL endpoint.

This processor takes a stream of RDF records, transforms them into corresponding SPARQL Update queries, and executes them against a SPARQL Graph Store via the SPARQL Protocol.
It supports INSERT DATA, DELETE INSERT WHERE, and DELETE WHERE queries, configurable through change semantics or SDS record content. It also supports direct quad ingestion via the SPARQL Graph Store Protocol.

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Usage

Installation

npm install
npm run build

Or install from NPM:

npm install @rdfc/sparql-ingest-processor-ts

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Pipeline Configuration Example

@prefix rdfc: <https://w3id.org/rdf-connect#>.
@prefix owl: <http://www.w3.org/2002/07/owl#>.

### Import the processor definitions
<> owl:imports <./node_modules/@rdfc/sparql-ingest-processor-ts/processors.ttl>.

### Define the channels your processor needs
<in> a rdfc:Reader.
<out> a rdfc:Writer.

### Attach the processor to the pipeline under the NodeRunner
# Add the `rdfc:processor <ingester>` statement under the `rdfc:consistsOf` statement of the `rdfc:NodeRunner`

### Define and configure the processor
<ingester> a rdfc:SPARQLIngest;
    rdfc:memberStream <in>;
    rdfc:ingestConfig [
        rdfc:operationMode "Replication";
        rdfc:memberBatchSize 500;
        rdfc:memberShape "http://ex.org/Shape";
        rdfc:changeSemantics [
            rdfc:changeTypePath "http://ex.org/changeType";
            rdfc:createValue "http://ex.org/Create";
            rdfc:updateValue "http://ex.org/Update";
            rdfc:deleteValue "http://ex.org/Delete"
        ];
        rdfc:targetNamedGraph "http://ex.org/myGraph";
        rdfc:transactionConfig [
            rdfc:transactionIdPath "http://ex.org/transactionId";
            rdfc:transactionEndPath "http://ex.org/transactionEnd"
        ];
        rdfc:graphStoreUrl "http://example.org/sparql";
        rdfc:forVirtuoso false;
        rdfc:accessToken "myAccessToken";
        rdfc:measurePerformance [
            rdfc:name "myPerformanceMeasurement";
            rdfc:outputPath "/path/to/output.json";
            rdfc:failureIsFatal true;
            rdfc:queryTimeout 30000
        ]
    ];
    rdfc:sparqlWriter <out>.

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Configuration

Parameters of rdfc:SPARQLIngest:

• rdfc:memberStream (rdfc:Reader, required): Input SDS record stream.
• rdfc:ingestConfig (rdfc:IngestConfig, required): Configuration for ingest behavior.
• rdfc:sparqlWriter (rdfc:Writer, optional): Output stream of generated SPARQL queries.

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Parameters of rdfc:IngestConfig:

• rdfc:operationMode (string, optional): Operation mode of the processor. Can be Replication or Sync. Replication mode uses the SPARQL Graph Store Protocol to ingest data directly into a triple store, which assumes that all received data is meant to be added. Sync mode uses the SPARQL UPDATE specification to ingest data via SPARQL queries, which allows for all CRUD operations.
• rdfc:memberBatchSize (integer, optional): Number of input records to batch together for ingestion when running in Replication mode.
• rdfc:memberShape (string, optional): SHACL shape used to guide query construction when payloads are incomplete.
• rdfc:changeSemantics (rdfc:ChangeSemantics, optional): Configures mapping between change types (create/update/delete) and SPARQL operations.
• rdfc:targetNamedGraph (string, optional): Force all operations into a specific named graph.
• rdfc:transactionConfig (rdfc:TransactionConfig, optional): Groups records by transaction ID for atomic updates.
• rdfc:graphStoreUrl (string, optional): SPARQL Graph Store endpoint URL.
• rdfc:forVirtuoso (boolean, optional): Enables Virtuoso-specific handling to avoid query size limits.
• rdfc:accessToken (string, optional): Access token for authenticated graph stores.
• rdfc:measurePerformance (rdfc:PerformanceConfig, optional): Enables performance measurement of SPARQL queries.

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Parameters of rdfc:ChangeSemantics:

• rdfc:changeTypePath (string, required): Predicate identifying the type of change in SDS records.
• rdfc:createValue (string, required): Value representing a create operation.
• rdfc:updateValue (string, required): Value representing an update operation.
• rdfc:deleteValue (string, required): Value representing a delete operation.

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Parameters of rdfc:TransactionConfig:

• rdfc:transactionIdPath (string, required): Predicate identifying the transaction ID.
• rdfc:transactionEndPath (string, required): Predicate marking the last record in a transaction.

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Parameters of rdfc:PerformanceConfig:

• rdfc:name (string, required): Name of the performance measurement run.
• rdfc:outputPath (string, required): File path where performance logs will be written.
• rdfc:failureIsFatal (boolean, optional): If true, aborts on performance measurement failure.
• rdfc:queryTimeout (integer, optional): Maximum query execution time in milliseconds.

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Example

<ingester> a rdfc:SPARQLIngest;
    rdfc:memberStream <in>;
    rdfc:ingestConfig [
        rdfc:targetNamedGraph "http://example.org/targetGraph";
        rdfc:graphStoreUrl "http://example.org/sparql"
    ];
    rdfc:sparqlWriter <out>.

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Notes

• Delete operations can be handled differently depending on how complete the input record is. A SHACL shape (rdfc:memberShape) can be provided to help identify deletion targets when payloads are incomplete.
• Transactions can buffer multiple input records and commit them together using rdfc:transactionConfig.