NAME

attean_query - Query RDF data with SPARQL

DESCRIPTION

attean_query provides a command-line interface to the Attean module and its SPARQL query functionality. It can load RDF data into in-memory storage, parse a SPARQL query, and evaluate the query against the stored data, serializing the results.

SYNOPSYS

attean_query [OPTIONS] QUERYFILE.rq [data1.ttl data2.rdf ...]

OPTIONS

• --algebra -a

  Print the SPARQL algebra resulting from query parsing.

• --plan -p

  Print the query plan which will be used for query evaluation.

• --simpleeval -s Use Attean::SimpleQueryEvaluator

  to evaluate the query, bypassing the default query-planner-based evaluation.

• -q

  Print a formatted version of the SPARQL query string.

• -c

  Check the syntax of the query.

• --short

  Use short blank-node identifiers in serialized results.

• --output FORMAT -o FORMAT

  Results format. FORMAT may be one of the Attean serializer names (e.g. "SPARQLJSON") or a file extension (e.g. "srj").

• --update -u

  Update mode.

• -n

  Dry-run.

• --verbose -v

  Verbose mode. Print debugging messages about the query process.