phpman > perldoc > 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/