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## What is it?
This is the reference implementation of JSR 303 - Bean Validation.
Bean Validation defines a metadata model and API for JavaBean validation.
The default metadata source is annotations, with the ability to override and extend
the meta-data through the use of XML validation descriptors.
## A bit of history
Prior to version 4.x Hibernate Validators was based on a different source base which
is not based on JSR 303. This code can be accessed via [this](https://github.com/hibernate/hibernate-validator/tree/pre-validator3-removal/hibernate-validator-legacy) GitHub tag.
## Documentation
The documentation for this release is included in the docs directory of distribution package or can be accessed [online](http://hibernate.org/validator/documentation/).
## Release Notes
The full list of changes for this release can be found in changelog.txt.
## System Requirements
JDK 1.6 or above.
## Using Hibernate Validator
* In case you use the distribution archive from the download site, copy dist/hibernate-validator-<version>.jar together with all
jar files from dist/lib/required into the classpath of your application. For the purposes of logging, Hibernate Validator uses
the JBoss Logging API, an abstraction layer which supports several logging solutions such (e.g. log4j or the logging framework
provided by the JDK) as implementation. Just add a supported logging library to the classpath (e.g. log4j-<version>.jar) and JBoss
Logging will delegate any log requests to that provider.
* Add the following to your maven or ivy dependency list (Hibernate Validator can be found in the [JBoss Maven repository](http://repository.jboss.org/nexus/content/groups/public-jboss)):
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
</dependency>
*hibernate-validator-annotation-processor-<version>.jar* is an optional jar which can be integrated with your build
environment respectively IDE to verify that constraint annotations are correctly used. Refer to the online
documentation for more information.
## Licensing
Hibernate Validator itself as well as the Bean Validation API and TCK are all provided and distributed under
the Apache Software License 2.0. Refer to license.txt for more information.
## Build from Source
You can build Hibernate Validator from source by cloning the git repository git://github.com/hibernate/hibernate-validator.git
You will also need a JDK 6 or 7 and a Maven 3. With these prerequisites in place you can compile the source via
mvn clean install -s settings-example.xml
The documentation module requires an additional tool called po2xml. If you don't have po2xml installed you can
skip the building of the documentation via:
mvn clean install -DdisableDocumentationBuild=true -s settings-example.xml
There are more build options available as well. For more information refer to [Contributing to Hibernate Validator](http://hibernate.org/validator/contribute/).
* [Home Page](http://hibernate.org/validator/)
* [Downloads](http://hibernate.org/validator/releases/4.3/)
* [Community Info](http://hibernate.org/community/)
* [Source Code](git://github.com/hibernate/hibernate-validator.git)
* [Issue Tracking](https://hibernate.atlassian.net/projects/HV)