title: How to merge 2 XML streams in Java by XSLT
body: <p>I'd like to merge 2 XML streams (strings) in Java, necessarily by XSLT (that I could change the transformation), but the problem is that the XMLs come as a string. There are many examples, but through the files. 
  Can this be done without saving them in files? </p>
  
  <p>Thanks.</p>