RDF::Redland::Query(3pm) - phpMan

RDF::Redland::Query(3pm)       User Contributed Perl Documentation       RDF::Redland::Query(3pm)

NAME
       RDF::Redland::Query - Redland RDF Syntax Query Class

SYNOPSIS
         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;
         }

DESCRIPTION
       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.

CONSTRUCTORS
       new QUERY-STRING [BASE-URI [QUERY-LANG-URI [QUERY-LANG]]]
           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.

METHODS
       execute MODEL
           Run the query against model MODEL returning a RDF::Redland::QueryResults object or
           undef on failure.

SEE ALSO
       RDF::Redland::QueryResults

AUTHOR
       Dave Beckett - http://www.dajobe.org/

perl v5.34.0                                2022-02-07                   RDF::Redland::Query(3pm)

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