A URL that points at a file containing data that the OBJECT
element can access.
|DOM level - 1|
|JScript - 3.0|
|Internet Explorer - 4.0|
|Netscape - 6.0|
|Property/method value type:||String primitive|
This is intended for passing in a URL that the ActiveX object can use to access some data service that is online and available for access via the network. It is not the URL of the ActiveX object itself.