You can use triplets to build self-describing SMF records that contain various types of data sections and a varying number of each of these sections.
All data sections are described by triplets that consist of:
The two triplets that describe the product section and the general record information section (for example, the section describing the container itself in a container activity record) are located at fixed positions within the record. This allows one to start evaluating the record right after having evaluated the record header.