When specified, only the requested attachment will be returned
Source
<xs:elementname="AttachmentDataId"type="xs:int"minOccurs="0"xmlns:xs="http://www.w3.org/2001/XMLSchema"><xs:annotation><xs:documentation><pxmlns="http://Hps.Exchange.PosGateway">When specified, only the requested attachment will be returned</p></xs:documentation></xs:annotation></xs:element>