JDO Spring integration. This is a fork of the Spring ORM JDO sources at github, for which support had been dropped back in 2016 [1]. Credits to the original authors. See also docs [2]. [1] https://github.com/spring-projects/spring-framework/issues/18702 [2] https://docs.spring.io/spring-framework/docs/3.0.0.RC2/reference/html/ch13s04.html