Extending : Global function extension : Describing global functions in a .xml file : <parameter> tag
  
<parameter> tag
The <parameter> tag describes a parameter of a function. The following is list of attributes of a <parameter> tag.
name
The name of the parameter that is displayed in visual editors.
description
The description of the parameter. It supports NLS when it starts with %.
type
The data type of the parameter such as String, Date, Number and Boolean
Go up to
Describing global functions in a .xml file