### Relevant Articles: 

- [Persisting Maps with Hibernate](https://www.baeldung.com/hibernate-persisting-maps)
- [Difference Between @Size, @Length, and @Column(length=value)](https://www.baeldung.com/jpa-size-length-column-differences)
- [Hibernate Validator Specific Constraints](https://www.baeldung.com/hibernate-validator-constraints)
- [Hibernate One to Many Annotation Tutorial](http://www.baeldung.com/hibernate-one-to-many)