35. Custom configuration elements

In addition to the above standard configuration elements, a third-party Java™ programmer may define its own custom configuration elements. Such elements are declared as follows:

<com.acme.MyConfigElement
  xmlns="http://www.xmlmind.com/xmleditor/schema/configuration/extension"
  ... Any attributes here ...
>
  ... Any child nodes here ...
</com.acme.MyConfigElement>

The "Integrated spreadsheet engine" add-on makes use of such custom configuration elements. See Section 28, “Custom spreadsheet functions”.