To add a subject row to a relationship table, insert a DITARelRow PI marker in the topic. The content of a DITARelRow PI marker is a subject name, which becomes the name of a row in the table. Each row in the table corresponds to one subject name, so topics with the same subject name all appear in the same row.
The same topic can appear in multiple rows, sharing each row with all other topics marked with the same subject name. Each subject name generates its own row, even if that row is otherwise identical to other generated rows.
DITARelRow
PI markers are equivalent to ALink
PI markers in Help systems.