Hades is an open source library that's built on top of JPA and Spring to significantly improve the implementation of data access layers by reducing the effort to the amount that's actually needed.

Hades是一个开源库，基于JPA和Spring构建，通过减少开发工作量显著的改进了数据访问层的实现。

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The University of Costa Rica (Universidad de Costa Rica, UCR) has a leading role in the promotion and implementation of open access in Costa Rica.

UNESCO: Global Open Access Portal