Some of the documentation is here:
- https://jazz.net/wiki/bin/view/Main/QueryDevGuide
- https://jazz.net/learn/LearnItem.jsp?href=content/docs/client-library-programming/index.html
- https://jazz.net/wiki/bin/view/Main/ComponentDevelopment
- https://jazz.net/wiki/bin/view/Main/JazzTalkWalkthrough

In order to get the results of multi-table join (especially with tree and/or graph-like structure) all the relationships needs to be encoded in the EMF model. Then you can fetch the parent object with handles to children and recurse that until you fetch all elements on all levels.

Dan Kogan
Jazz Server team

We have a very complicated model. The model is saved in Jazz repository(database). The auto generated code include some query model. My question is do these query model support complicated searching?
For example,item A refer to item B, item B refer to item C, item C refer to item D. I want to search item D with the name attribute. And the results should also include all it's parent(item C, B and A). This is just like a tree searching. I want to use one query to get all the elements(D, C, B, A). Is that possible??

And, one more question: where can I find the development guidance about Jazz/RTC, such as how to use query model.