4s-queryJ

PROGRAM:

NAME

4s-query — Run SPARQL queries on a 4store storage backend

SYNOPSIS

4s-query kb-name [-f format] [-O optimisation-level] [-I insert-mode] [-r] [-s soft-limit]
[-b base-URI] [-e] [-P] [query]

-f Set the format to output results it, options are "sparql", "text", "json",
and "testcase"

-O, --opt-level
Set the optimisation level of the query engine, in the range 0-3.

-I, --insert
Treat CONSTRUCT statements as INSERT statements. This feature is highly
experimental and largely untested.

-r, --restricted
Enable query complexity restriction mode

-s, --soft-limit
Override default soft limit on search breadth

-d, --default-graph
Enable SPARQL default graph support

-b, --base
Set base URI for queries

-e, --explain
Return an explanation of the query planner's decisions

-P Enable programatic IO mode

INTERACTIVE MODE

If [query] is omitted then 4s-query goes into interactive mode, suitable for trying queries
from the command line.

-P enables programmatic interactive mode, suitable for interfacing with processes via stdin
and stdout. Queries are sent as UTF-8 bytes, terminated with "#EOQ" on a line of it's own,
results are returned, ending with "#EOR". Interacting with 4store in this way is more
efficient than using the SPARQL protocol, but non-standard.

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