SIF_Header Diagram

SIF_Header is present in every SIF Message. Below is a diagram of SIF_Header that contains its elements, their corresponding data types, and explanations drawn primarily from the specification. An XML example from the specification is also shown with a particular explanation regarding the use of SIF_DestinationId.
(I have decided to post this and future diagrams as GIF's because they tend to render more cleanly than PNG's.)