JPA and Toplink are the most popular JPA impls, to my knowledge.

Here's more info on the nature of JPA and its implementations: 
http://today.java.net/pub/a/today/2007/12/18/adopting-java-persistence-framework.html

~~ Robert.

Kram wrote:
> Hi everyone,
> 
> In episode 236 (and others) I have heard mention of people talking
> about different "implementations" of frameworks, like in episode 236
> Steve Harris mentions the "JPA Implementation" the was open sourced.
> 
> What exactly does that mean? Could someone please provide me with some
> reading material on this topic?
> 
> Does JPA define some sort of implementation standard that people can
> create and officially call it a JPA implementation based on the JPA
> standard? Or am I way off track here?
> 
> Thanks, I hope this made sense!
> Mark
> > 
> 

-- 
~~ Robert Fischer.
Grails Training        http://GroovyMag.com/training
Smokejumper Consulting http://SmokejumperIT.com
Enfranchised Mind Blog http://EnfranchisedMind.com/blog

Check out my book, "Grails Persistence with GORM and GSQL"!
http://www.smokejumperit.com/redirect.html

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