RDF::Redland::Query - Redland RDF Syntax Query Class
use RDF::Redland; ... my $query=new RDF::Redland::Query($query_string); # default query language my $results=$query->execute($model); # or my $results=$model->query_execute($query); while(!$results->finished) { for (my $i=0; $i < $results->bindings_count(); $i++) { my $name=$results->binding_name($i); my $value=$results->binding_value($i); # ... do something with the results } $results->next_result; }
This class represents queries of various syntaxes over an RDF::Redland::Model returning a sequence of results that (currently) bind variable names to RDF::Redland::Node values.
Create a new RDF::Redland::Query object for a query string QUERY-STRING with optional base URI BASE-URI IN QUERY language QUERY-LANG or query language URI QUERY-LANG-URI (both can be undef). If QUERY-LANG-URI is omitted, the current directory is used as the base URI. If QUERY-LANG-NAME is undef, the default query language "rdql" is used. If BASE-URI is omitted, no base URI is used.
Run the query against model MODEL returning a RDF::Redland::QueryResults object or undef on failure.
RDF::Redland::QueryResults
Dave Beckett - http://purl.org/net/dajobe/
To install RDF::Redland::World, copy and paste the appropriate command in to your terminal.
cpanm
cpanm RDF::Redland::World
CPAN shell
perl -MCPAN -e shell install RDF::Redland::World
For more information on module installation, please visit the detailed CPAN module installation guide.