/usr/share/perl5/Attean/AggregateExpression.pod is in libattean-perl 0.017-1.
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Attean::AggregateExpression - Representation of aggregate expression trees
=head1 VERSION
This document describes Attean::AggregateExpression version 0.017
=head1 DESCRIPTION
The Attean::AggregateExpression class represents an expression tree where the
root node is an aggregate operation (e.g. SUM(?a) or COALESCE(?a/?b, ?c, 0)).
=head1 ROLES
This role consumes the L<Attean::API::AggregateExpression> role.
=head1 ATTRIBUTES
The following attributes exist:
=over 4
=item C<< operator >>
The name of the aggregate operator, from the allowable set: COUNT, SUM, MIN,
MAX, AVG, GROUP_CONCAT, SAMPLE.
=item C<< scalar_vars >>
A HASH reference of scalar variables. The only scalar variable defined for
SPARQL 1.1 is C<'seperator'>, a string separator used with the GROUP_CONCAT
aggregate.
=item C<< distinct >>
A boolean indicating whether the aggregate should operate over distinct term sets, or full multisets.
=item C<< variable >>
A L<Attean::API::Variable> object which will be bound to the produced aggregate value in results.
=back
=head1 BUGS
Please report any bugs or feature requests to through the GitHub web interface
at L<https://github.com/kasei/attean/issues>.
=head1 SEE ALSO
L<http://www.perlrdf.org/>
=head1 AUTHOR
Gregory Todd Williams C<< <gwilliams@cpan.org> >>
=head1 COPYRIGHT
Copyright (c) 2014--2016 Gregory Todd Williams.
This program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
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