This PR polishes the Validation Section of the IO docs to include additional information regarding the handling of JSR-303's "Groups" within the context of Spring.
Also includes links to the Hibernate Validator Implementation of JSR-303, as it is currently the default provided by spring-boot-starter-validation, and is directly linked within the Spring Framework Core Validation Documentation.
Debated if this inclusion belonged in the Spring Framework Docs, or the Spring Boot Docs. Decided to put it here as Spring Framework's Documentation felt more about under the hood interactions, where this was more notes and interactions.
Comment From: wilkinsona
Thanks for the proposal but I think this belongs in this section of Spring Framework's reference documentation. I don't think there's anything Spring Boot-specific about working with groups and both @Validated and SmartValidator are Spring Framework APIs.