NAME¶

Attean::Expression - SPARQL Expressions

VERSION¶

This document describes Attean::Expression version 0.033

SYNOPSIS¶

  use v5.14;
  use Attean;
  my $binding = Attean::Result->new();
  my $value = Attean::ValueExpression->new( value => Attean::Literal->integer(2) );
  my $plus = Attean::BinaryExpression->new( children => [$value, $value], operator => '+' );
  my $result = $plus->evaluate($binding);
  say $result->numeric_value; # 4

DESCRIPTION¶

This is a utility package that defines all the Attean SPARQL expression classes consisting of logical, numeric, and function operators, constant terms, and variables. Expressions may be evaluated in the context of a Attean::API::Result object, and either return a Attean::API::Term object or throw a type error exception.

The expression classes are:

• Attean::ValueExpression
• Attean::UnaryExpression
• Attean::BinaryExpression
• Attean::FunctionExpression

BUGS¶

Please report any bugs or feature requests to through the GitHub web interface at <https://github.com/kasei/attean/issues>.

SEE ALSO¶

AUTHOR¶

Gregory Todd Williams "<gwilliams@cpan.org>"

COPYRIGHT¶

Copyright (c) 2014--2022 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.