References that include options or arguments in any namespace other than XFDL normally require the inclusion of the namespace prefix in the reference. For example, if you want to reference "myOption" in the "custom" namespace, refer to that option as "custom:myOption" as shown:
If you are referencing named arguments, you should also use the appropriate namespace. For example:
However, if you are referencing an argument by index number you do not need to worry about namespace. All arguments, regardless of namespace, are indexed in order. For example, if "myOption" contains two arguments, the first in the XFDL namespace and the second in the custom namespace, use the following reference for the second argument:
Note: Page and item references never require a namespace prefix because they are uniquely identified by their sid.