xQuery

I had worked with BEA Weblogic Intergation for around 3+ years used xQuery for transformations, however it was sometimes difficult for few complex transformation , Java XML APIs as a part of tool were last resort for such complicacies.

Now after a while with JCAPS, I have started with Oracle SOA 11g and I again same xQuery. Interesting!

So first question for me was, what should be the editor for me? I have used jDeveloper(there are many just google it), where I can run the xQuery samples which I will create during learning.

There are many websites for documents and tutorials
I started with http://www.w3schools.com/xquery/default.asp for initial understanding and being familiar with the technology. For xQuery functions I have tried by hand with http://www.xqueryfunctions.com/. During this I realized xPath is important. Well switched to xPath.

Cannot forget to mention http://try.zorba-xquery.com/ for initial learning; trying lot of sample queries.

Not tired or started fresh day, you can try your hand with use cases:

http://www.w3.org/TR/xquery-use-cases/