To register the Oxygen XML WebHelp plugin for the DocBook XSL distribution,
follow these steps:
Create a .txt file named license in the
com.oxygenxml.webhelp subdirectory of the DocBook XSL
directory.
In this file, copy the license key, which you purchased for your Oxygen XML WebHelp plugin.
The WebHelp transformation process reads the Oxygen XML Editor license key from this file. If the file does not exit, or it contains an invalid license, an error message is
displayed.