roqet - Rasqal RDF query utility

roqet [OPTIONS] <query-URI> [base-URI]

roqet example.rdql



roqet -q -i rdql x.rdql http://example.org/base/



roqet -i sparql -r xml http://example.org/query.rq

The roqet utility allows querying of RDF content using the Rasqal RDF query library, printing the results in variable bindings, RDF graph or boolean format. The query is read from query-URI and the optional base-URI is used as the base URI of the query if present.

roqet uses the usual GNU command line syntax, with long options starting with two dashes (`-') if supported by the getopt_long function. Otherwise only the short options are available.

-h, --help

Show a summary of the options. -i, --input LANGUAGE Set the input query LANGUAGE to one of'sparql' (SPARQL Query Language for RDF, default) or 'rdql' (RDF Data Query Language). The list of supported languages is given in the help summary given by -h.

-r, --results FORMAT

Set the query results format.

For variable bindings, the values of FORMAT are 'simple' for a simple text format (default), 'xml' for the SPARQL Query Results XML format V2 or 'xml-v1' for the SPARQL Query Results XML format V1

For RDF graph results, the values of FORMAT are 'ntriples' (N-Triples, default), 'rdfxml-abbrev' (RDF/XML Abbreviated), 'rdfxml' (RDF/XML), or 'rss-1.0' (RSS 1.0, also an RDF/XML syntax).

The exact list of formats depends on what libraptor(3) was built with but is given correct in the usage message with -h.

-c, --count

Only count the triples and produce no other output.

-d, --dump-query

Print a debugging dump of the constructed query.

-n, --dryrun

Prepare the query but do not execute it.

-q, --quiet

No extra information messages.

-s, --source URI

Query against RDF data at source URI by adding it to the list of query data source URIs. FORMAT to 'simple' (default) or 'xml' (an experimental XML format)

-v, --version

Print the rasqal library version and exit.

-w, --walk-query

Walk the query and display it using the API.

RDQL RDF Data Query Language, HP Labs, http://www.w3.org/Submission/2004/SUBM-RDQL-20040109/

SPARQL Query Language for RDF, Edited by Eric Prud'hommeaux and Andy Seaborne, W3C Working Draft, 19 April 2005. Work in progress. http://www.w3.org/TR/2005/WD-rdf-sparql-query-20050419/ SPARQL Variable Binding Results XML Format, Edited by Dave Beckett, W3C Working Draft, 21 December 2004. Work in progress. http://www.w3.org/TR/2004/WD-rdf-sparql-XMLres-20041221/

librasqal(3),rasqal-config(1),libraptor(3)

Dave Beckett - http://purl.org/net/dajobe/

Institute for Learning and Research Technology (ILRT) http://www.ilrt.bristol.ac.uk/

University of Bristol http://www.bristol.ac.uk/