| EntityState | The entity state interface defines methods that must be implemented by components that store information about entity declarations, as well as by entity validator that will need to validate attributes of type entity. | code | html |
| ConfigurableValidationState | An extension of ValidationState which can be configured to turn off checking for ID/IDREF errors and unparsed entity errors. |
code | html |
| ValidationManager | ValidationManager is a coordinator property for validators in the pipeline. | code | html |
| ValidationState | Implementation of ValidationContext inteface. | code | html |