How to do inner join with JDO 1.0

Question

I am working on Healthcare Project which is developed using JDO 1.0. I have googled and i have not found good stuff for JDO 1.0. My problem is that, I have to join two tables Encounter table and History table.The encounter table contains a column which is a foreign key to Historyparent table and History table also contains column which is foreign key to HistoryParent table.Now coming on to domain structure, Encounter domain is extending HistoryParent domain where as History domain contains field with one-one mapping to HistoryParent domain.Now how to filter encounters with History field data.Thanks for your valuable answers in advance.

Answer 1

http://download.oracle.com/otndocs/jcp/7734-jdo-1.0.1-mr-spec-oth-JSpec/

I hope this is the Spec you are looking for.