Special purpose component, allows the user to instruct OpenLink Virtuoso triplestore to load a file from the remote file system. Uses Virtuoso Bulk Loader functionality.

Virtuoso JDBC connection string

JDBC database connection string to connect to the Virtuoso iSQL port, e.g. jdbc:virtuoso://localhost:1111/charset=UTF-8/

Virtuoso user name

User name to Virtuoso (default in Virtuoso is dba)

Virtuoso password

Password to Virtuoso. Note that this is plain text and in no way secured. (default in Virtuoso is dba)

Remote directory with source files

Directory on the remote file system (local to Virtuoso) where the files to be loaded are located

Filename pattern to load

A filename pattern of files to load. This can be either a single file like data.ttl or a pattern such as data*.ttl

Target graph IRI

Target RDF graph for input triple files and default graph in quad files

Clear target graph before loading

When checked, executes SPARQL CLEAR GRAPH on the target graph before loading

Execute checkpoint

When checked, executes the checkpoint; command after loading. Otherwise, checkpoint will be executed as configured in the Virtuoso instance. If that instance crashes before checkpoint; is executed, the loaded data will be lost.

Number of loaders to use

Virtuoso can load multiple files in parallel. This specifies how many and it should correspond to the available number of cores on the server.

Status update interval in seconds

Interval for polling Virtuoso for load status update