The UserDataItem object represents a single instance of user data that has been attached to a Softimage component. For example, each polygon on a Cluster with a UserDataMap will have its own instance of this UserDataItem object.
This object is provided for convenience but it is also possible to manipulate the user data using the methods UserDataMap.ItemValue, UserDataMap.ItemSize and UserDataMap.IsEmpty provided directly on the UserDataMap.
• See UserDataItem.1.vbs
Autodesk Softimage 2011