SPARQL endpoint select scrollable cursor
Extractor, allows the user to extract a CSV table from a SPARQL endpoint using a SELECT query, using the scrollable cursor technique for OpenLink Virtuoso.
- Endpoint URL
- URL of the SPARQL endpoint to be queried
- File name
- File name of the resulting CSV table
- Page size
- Specifies the size of one page to be returned
- Default graph
- IRIs of default graphs used for the SPARQL query
- Query prefixes
- Prefixes to be defined for the scrollable cursor query
- Outer select clause
- The SELECT clause of the outer paging query. It should be a subset of the SELECT clause of the inner query
- Inner select query
- Ordered SELECT query to be used as a nested query in the outer paging query
Characteristics
- ID
- e-sparqlendpointselectscrollablecursor
- Type
- extractor
- Outputs
- Files
- Look in pipeline
- Sample pipeline
- available
The SPARQL endpoint select scrollable cursor component queries a remote SPARQL endpoint using a SPARQL SELECT query, using the scrollable cursor technique for OpenLink Virtuoso. This is helpful for getting larger results from an OpenLink Virtuoso SPARQL endpoint which would not return such a large result normally. This component is often used in combination with the SPARQL endpoint chunked component. The SELECT query needs to have its results ordered using ORDER BY.