Any text prefixed with -- is not processed which allows for remarks to be added, for example, a description of the specification.
A line containing only the text HEADING is required to specify that the following line contain headings.
The NAME column must contain a unique name, prefixed by an asterisk *. The name should be related to the CATREF or TMPREF of the joint referenced in the same row. Where the same joint is used for different ranges, the name can be made unique by suffixing the name with an index number.