---
name: "CPAN::Meta::Validator"
section: "3p"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/CPAN::Meta::Validator"
---

# CPAN::Meta::Validator(3p)

validate CPAN distribution metadata structures

## NAME

CPAN::Meta::Validator - validate CPAN distribution metadata structures

## VERSION

version 2.150010

## SYNOPSIS

```
  my $struct = decode_json_file('META.json');
  my $cmv = CPAN::Meta::Validator->new( $struct );
  unless ( $cmv->is_valid ) {
    my $msg = "Invalid META structure.  Errors found:\n";
    $msg .= join( "\n", $cmv->errors );
    die $msg;
  }
```

## DESCRIPTION

This module validates a CPAN Meta structure against the version of the the specification claimed in the `"meta-spec"` field of the structure.

## METHODS

### new

```
  my $cmv = CPAN::Meta::Validator->new( $struct )
```

The constructor must be passed a metadata structure.

### is\_valid

```
  if ( $cmv->is_valid ) {
    ...
  }
```

Returns a boolean value indicating whether the metadata provided is valid.

### errors

```
  warn( join "\n", $cmv->errors );
```

Returns a list of errors seen during validation.

## BUGS

Please report any bugs or feature using the CPAN Request Tracker. Bugs can be submitted through the web interface at \<http://rt.cpan.org/Dist/Display.html?Queue=CPAN-Meta\>

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.

## AUTHORS

- •

  David Golden \<dagolden@cpan.org\>

- •

  Ricardo Signes \<rjbs@cpan.org\>

- •

  Adam Kennedy \<adamk@cpan.org\>

## COPYRIGHT AND LICENSE

This software is copyright (c) 2010 by David Golden, Ricardo Signes, Adam Kennedy and Contributors.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.