# Reference

The following reference material on J2EE is available:

- J2EE Validators
  This table lists the validators that are available for the different project types and gives a brief description of each validator.
- Common validation errors and solutions
  This table lists the common error messages you may encounter when you validate your projects.
- Limitations of J2EE development tools
  This topic outlines current known limitations and restrictions for J2EE tooling.

Parent topic: Java EE applications