Attean::Expression - SPARQL Expressions
This document describes Attean::Expression version 0.006
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
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
Please report any bugs or feature requests to through the GitHub web interface at https://github.com/kasei/attean/issues.
http://www.perlrdf.org/
Gregory Todd Williams <gwilliams@cpan.org>
<gwilliams@cpan.org>
Copyright (c) 2014 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
To install Attean, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Attean
CPAN shell
perl -MCPAN -e shell install Attean
For more information on module installation, please visit the detailed CPAN module installation guide.