For each event or operation sent to or received from the ZIS, an XML document containing a SIF_Ack message is returned. A SIF_Ack contains either a SIF_Status element acknowledging a successful result or a SIF_Error element indicating the error. The SIF_Error element contains an error number as well as a description of the error. The error number and descriptions are defined in the SIF Implementation Specification.
<SIF_Status> <SIF_Code>0</SIF_Code> <SIF_Data>Success</SIF_Data> </SIF_Status>
<SIF_Error> <SIF_Category>1</SIF_Category> <SIF_Code>1</SIF_Code> <SIF_Desc>Message is not well-formed</SIF_Desc> <SIF_ExtendedDesc>Next character must be ">" terminating element "Name".</SIF_ExtendedDesc> </SIF_Error>