The body consists of a series of data records. Each data record has a data header that describes the data that follows it. The data type is classified as either ALIAS, ITEM, or ATTRIBUTES. The data header is mapped by one of three different data sections of the IEWTFMT mapping macro, depending upon the data type.

Figure 1. Transportable program body structure

In the body of a transportable program, the first records are alias records, followed by the attributes record, and then the item records. There can be multiple alias and item records but only one attributes record.

The maximum size of a data record cannot exceed the sequential data set block size of 4KB. Items larger than 4KB span several blocks.