Reports incorrect elements in Bean Validation <validation-config> files:

• References to non-instantiable classes
• References to classes that do not extend required class
• References to classes with inappropriate scope
• Empty tag and attribute values
• Tag and attribute values that do not match the required pattern (for example, Java Identifiers)
• Tags that do not include required children tags or attributes
• Tags that define objects with duplicate names

Example:

<validation-config>
  <default-provider>foo.UnknownProvider</default-provider>  <!-- Cannot resolve class or package 'UnknownProvider'  -->
  <message-interpolator>my.Interpolator</message-interpolator>
  <constraint-mapping>META-INF/ConstraintMappings.xml</constraint-mapping>
  <constraint-mapping>META-INF/unknown.xml</constraint-mapping>
</validation-config>