Uno Openoffice for document generation

hey all.
i'm working on a project to generate openoffice documents, and I found that to do that I'll need to use UNO.

but, I have some questions, perhaps you can help me?

To properly learn UNO, will I need to have basic understanding of IDL?

What in fact UNO does? I found that UNO convert my IDL into java (or python or C++ or other...) but where I have the OpenOffice documents creating?

Is UNO a API? or a specific language?

If it's an API, is for what language?

Perhaps one of you fellows does understand UNO, and can help me.

UNO is an object model and API for making use of OO's capabilities. There's a Java binding as well as a C/C++ binding. I don't think IDL is involved.

But if you just want to create OO documents, it would be easier to use an ODF library than to drive OO through its API. See "ODFDOM" in http://faq.javaranch.com/java/AccessingFileFormats