2.5.2 Data that can be received by Custom Window Plugins
To send data to a custom window, you must use the ucnpUserData parameter. If you want to receive multiple pieces of data in a new window, combine them, and then specify this combination for the ucnpUserData parameter.
You can use the GET or POST method to send the ucnpUserData parameter. You must note the following if you use the GET method to send data as part of the URL:
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Specify a URL encoded value in UTF-8.
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Specify a value within the maximum number of characters that can be used for the URL of the Web browser you want to use.
If these conditions are not satisfied, operation is unpredictable.
Note that the ucnpUserData parameter takes effect only on the custom window that first appears when you log in to Navigation Platform. This parameter is disabled if you switch to another window from the custom window after the login.