sd_sparql_query

Synopsis

sd_sparql_query [-D LOCAL CONTEXT] [-s SID] [-o OUT_FORMAT]

Description

execute execute a SPARQL query construct from a SPARQL query string passed in stdin. It returns the results in stdout according the format specified in OUT_FORMAT (default xml). If the specified format is incompatible with the QUERY_COMMAND the selected format fallback to xml

All input and outputs must be in UTF8 charset.

-s SID, -D “sid=SID”

connect to Graph Store named SID ( STORE by default)

-o OUT_FORMAT -D “out_format=OUT_FORMAT”

write result in OUT_FORMAT

OUT_FORMAT

one of these

Context

The default context is loaded from the SD_DEFAULT_CONTEXT configuration variable

Exit status

Exits 0 on success, -1 of test fail and > 0 if an error occurs.

Availability

Since SDaaS 4

Examples

cat 'SELECT DISTINCT ?class WHERE { ?s a ?class} LIMIT 10' | sd sparql query -o csv

execute a the sparql SELECT statement returning the result as a CSV stream

cat 'SELECT DISTINCT ?class WHERE { ?s a ?class} LIMIT 10' | sd sparql query -D "out_format=csv"

same as above but using context definition

cat 'ASK ?s WHERE {?s ?p ?o}' | sd sparql query -o boolean

echo “true” if ASK the statement is true

cat'SELECT ?s WHERE { ?s a <urn:type> }' | sd sparql query -o test

return 0 if SELECT the statement returns an empty list