the bulk importer imports all files matching a pattern
in a given directory. If given a list of files, these are
temporarily symlinked (or copied on Windows machines) to
the Virtuoso app cache dir in a subdirectory, and the entire
subdirectory is loaded (filtered by the globbing pattern).
If files are not specified, load is called directly on the specified
directory and pattern. This is particularly useful for loading large
numbers of files.
Note that Virtuoso recommends breaking large files into multiple smaller ones,
which can improve loading time (particularly if using multiple cores.)
Virtuoso Bulk Importer recognizes the following file formats:
.grdf
.nq
.owl
.nt
.rdf
.trig
.ttl
.xml
Any of these can optionally be gzipped (with a .gz
extension).