<ostream>
(Binary Stream Object)
This element specifies a binary stream object variant type.
This type is defined as follows: Identical to the definition of the <stream>
element, but indicates that the stream contains a serialized object, which is a CLSID – see the ST_Clsid simple type (§7.4.3.2) – followed by initialization data for the specified class.
The possible values for this element are defined by the XML Schema base64Binary datatype.