SemanticWeb-Schema/lib/SemanticWeb/Schema/ConstraintNode.pm
use utf8;
package SemanticWeb::Schema::ConstraintNode;
# ABSTRACT: The ConstraintNode type is provided to support usecases in which a node in a structured data graph is described with properties which appear to describe a single entity
use v5.14;
use Moo;
extends qw/ SemanticWeb::Schema::Intangible /;
use MooX::JSON_LD 'ConstraintNode';
use Ref::Util qw/ is_plain_hashref /;
# RECOMMEND PREREQ: Ref::Util::XS
use namespace::autoclean;
our $VERSION = 'v23.0.0';
has constraint_property => (
is => 'rw',
predicate => '_has_constraint_property',
json_ld => 'constraintProperty',
);
has num_constraints => (
is => 'rw',
predicate => '_has_num_constraints',
json_ld => 'numConstraints',
);
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
SemanticWeb::Schema::ConstraintNode - The ConstraintNode type is provided to support usecases in which a node in a structured data graph is described with properties which appear to describe a single entity
=head1 VERSION
version v23.0.0
=head1 DESCRIPTION
The ConstraintNode type is provided to support usecases in which a node in a structured data graph is described with properties which appear to describe a single entity, but are being used in a situation where they serve a more abstract purpose. A L<SemanticWeb::Schema::ConstraintNode> can be described using [[constraintProperty]] and [[numConstraints]]. These constraint properties can serve a
variety of purposes, and their values may sometimes be understood to indicate sets of possible values rather than single, exact and specific values.
=head1 ATTRIBUTES
=head2 C<constraint_property>
C<constraintProperty>
Indicates a property used as a constraint. For example, in the definition of a L<SemanticWeb::Schema::StatisticalVariable>. The value is a property, either from within Schema.org or from other compatible (e.g. RDF) systems such as DataCommons.org or Wikidata.org.
A constraint_property should be one of the following types:
=over
=item C<InstanceOf['SemanticWeb::Schema::Property']>
=item C<Str>
=back
=head2 C<_has_constraint_property>
A predicate for the L</constraint_property> attribute.
=head2 C<num_constraints>
C<numConstraints>
Indicates the number of constraints property values defined for a particular L<SemanticWeb::Schema::ConstraintNode> such as L<SemanticWeb::Schema::StatisticalVariable>. This helps applications understand if they have access to a sufficiently complete description of a L<SemanticWeb::Schema::StatisticalVariable> or other construct that is defined using properties on template-style nodes.
A num_constraints should be one of the following types:
=over
=item C<InstanceOf['SemanticWeb::Schema::Integer']>
=back
=head2 C<_has_num_constraints>
A predicate for the L</num_constraints> attribute.
=head1 SEE ALSO
L<SemanticWeb::Schema::Intangible>
=head1 SOURCE
The development version is on github at L<https://github.com/robrwo/SemanticWeb-Schema>
and may be cloned from L<git://github.com/robrwo/SemanticWeb-Schema.git>
=head1 BUGS
Please report any bugs or feature requests on the bugtracker website
L<https://github.com/robrwo/SemanticWeb-Schema/issues>
When submitting a bug or request, please include a test-file or a
patch to an existing test-file that illustrates the bug or desired
feature.
=head1 AUTHOR
Robert Rothenberg <rrwo@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is Copyright (c) 2018-2023 by Robert Rothenberg.
This is free software, licensed under:
The Artistic License 2.0 (GPL Compatible)
=cut