---
name: "Attean::Expression"
section: "3pm"
platform: "linux"
package: "libattean-perl"
version: "0.035-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Attean::Expression"
---

# Attean::Expression(3pm)

SPARQL Expressions

## NAME

Attean::Expression - SPARQL Expressions

## VERSION

This document describes Attean::Expression version 0.035

## 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.