
Introduction to XML •
formats. All this is not shown in the figure for avoiding unnecessary details. This is like the highest-
level root of a tree structure, which contains all sub-structures inside it.
• Functionweal group header – It defines the type of business information that is being transferred.
For example, in Figure 16.6, the functional group header identifies a purchase order.
• Transaction set header – This represents each item within a functional group. For instance, if we
had two purchase orders, there would have been two transactional set headers within the functional
group header, one for each purchase order.
• Data ...