| the syntax of transmitted elements are bold typeface |
| instructions are never bold typeface |
| a sub-section that may be present one or more times gives the loop instructions in beginning and ending blocks with a yellow backround |
| a variable length element with a gray backround |
| the first element in a sub-section always has a light green background color |
| conditional instructions always have a hot pink background |
| The table footer (if present) always has a light blue background |