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To register the license for the Oxygen XML WebHelp Classic plugin for the DocBook XSL distribution, follow these steps:

  1. Obtain a valid license for the Oxygen XML WebHelp Plugin at https://www.oxygenxml.com/buy_webhelp.html.
  2. Open the [DocBook XSL directory]\com.oxygenxml.webhelp.classic directory, create a file called licensekey.txt, and copy your license key that you purchased for your Oxygen XML WebHelp Classic plugin.
    When you execute a WebHelp Classic transformation script, the process reads the Oxygen XML WebHelp Classic plugin license key from this file. If the file does not exist, or it contains an invalid license, an error message will be displayed.