DataNucleus Access Platform 是一个兼容各种标准的 Java 数据持久化框架，兼容 JDO1, JDO2, JDO2.1, JDO2.2, JDO2.3, JPA1, JPA2 等 Java 标准。提供一个基于 REST 的API。通过它可以访问所有常见的数据库服务器，还包括 LDAP, NeoDatis, JSON, Excel/ODF spreadsheets, XML, BigTable, 和 HADOOP 数据库等。
DataNucleus Access Platform 发布了 3.1 的***里程碑，
该版本改进记录包括：
- javax.time is now supported out of the box.
- Support for bulk loading from datastore via PM.getObjectsById was added.
- Support for JPA2.1 AttributeConverter API was added.
- Support for multitenancy via discriminator for HBase was added.
- Support for JDO/JPA schema naming conventions was added for ODF, Excel, MongoDB, HBase, and JSON datastores.
- A new internal generic type converter API was added, and is supported for RDBMS, ODF, Excel, MongoDB, HBase, and JSON datastores.
下载地址：http://sourceforge.net/projects/datanucleus/
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