[oXygen-user] xinclude

Posted this to the forum, too. Sorry for the dupe. I'm learning OxygenXML's 9.1 support for Xinclude. I have two files, with one pointing by means of Xinclude to the other - no Xpointer, just want the contents of the entire second file. Validation succeeds with no errors, so I assume that the Xinclude is correct. Next--how can I view the resulting document, with the contents of the second file displayed in the first? Must I perform a transformation to see the results, or is there some other way?