The synopfragment element allows a synopsis (for example a cmdsynopsis) to move common fragments out-of-line. The location where these fragments occur in the primary synopsis is indicated with a synopfragmentref. The stylesheets will generate a mark, analogous to the marks used for footnotes or callouts, to connect the reference to the fragment. The fragment will be processed in m:synopfragment-bug to produce that mark.