symfony/symfony — pull request #7756 by ajgarlag (2013-04-21 09:57:42+00:00)
Title: [Validator] Added ISSN Validator

| Q | A
| ------------- | ---
| Bug fix? | no
| New feature? | yes
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets |
| License | MIT
| Doc PR |

This PR complements the ISBN validator added some months ago to allow validation of relevant library systems data.