Is it possible to using JDO and distributed transaction?

I'am new to study JDO.

Can and How I use JDO an distributed transaction?(multiple database)。
Is ObjectDB also provided JCA util just like DataNucleus?

Reference：
    Spring Framework Reference Documentation 
    JCA, JTA, and JDO Transactions - Using and Understanding Java Data Objects
    JDO : Usage of DataNucleus within a JEE environment  
 

ObjectDB supports distributed transactions and JTA through JPA.

The solutions that are described in your references have never been tested in ObjectDB and no special arrangements have been done to support JTA via JDO in ObjectDB.