title: Hibernate implementation of JPA
body: <p>I'm wanting using JPA in ear project. Development project must be started ASAP so I have not a lot of time to research and investigate. Could you say please JPA API is restricted functionality of Hibernate or no. At this moment I'm using Hibernate directly. For example in future I'm planing to use hibernate-search and maybe hibernare-validate and -shard. Can I be sure that in future I will not have problem with using this. 
  And one more example - can I use HAR archive and JPA together. 
  Why JPA? For project will available RESTful service (jersey or resteassy implementation). And as I looked in much case using JPA for this. I'm a newbie in this so it's only my IMHO. May be i mistakes.</p>
  
  <p>Thanks a lot.
  Best regards 
  Artem</p>