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MAN page from OpenSuSE 4store-1.1.5-lp152.3.6.x86_64.rpm

4S-QUERY

Section: Misc. Reference Manual Pages (1J)
Updated: 4store
Index
BSD mandoc
4store 

NAME

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

SYNOPSIS

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 largly 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 descisions
-P
Enable programatic IO mode

 

INTERACTIVE MODE

If[query]is ommited thengoes into interactive mode, suitable for trying queries from the command line.

-Penables programatic interactive mode, suitable for infacing with processes viastdin 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 SPARQLprotocol, but non-standard. 

SEE ALSO

4s-import1,4s-httpd1,4s-backend1,4s-delete-model1 

STANDARDS

implements the SPARQL Query Language specification (aka. SPARQL/Query 1.0) and the SPARQL Result Format specification (aka. SPARQL/Results 1.0).

Default graph support is no normally enabled, the --default-graph turns it on, as does speicfying FROM <default:> in the query. Data loaded with

$ 4s-importkb--add-mdefault:uri/filename

will be added to the default graph. 

EXAMPLES

$-f sparql demo 'SELECT * WHERE { ?s ?p ?s } LIMIT 10'

Return 10 random triples from the knowledgebase "demo" in the SPARQL XML resultformat.

$-Pdemo < query.rq

Run the query in query.rq and output the result to stdout


 

Index

NAME
SYNOPSIS
INTERACTIVE MODE
SEE ALSO
STANDARDS
EXAMPLES

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