changed added deleted off left right center click double-click press seq simul other linespecific numbered unnumbered refentry none qanda number none optional required optional required other sect1 sect2 sect3 sect4 sect5 normal compact arabic upperalpha loweralpha upperroman lowerroman inherit ignore continues restarts normal compact inline vert horiz calspair linecolumn linerange linecolumnpair other calspair linecolumn linerange linecolumnpair other calspair linecolumn linerange linecolumnpair other monospaced normal left right center left right center top bottom topbot all sides none opt req plain norepeat repeat opt req plain norepeat repeat class interface opt req plain norepeat repeat service trade registered copyright hardware software name table field key1 key2 record headerfile devicefile libraryfile directory symlink limit cartridge cdrom disk tape command function option command function option parameter attribute attvalue element endtag emptytag genentity numcharref paramentity pi xmlpi starttag sgmlcomment limit constant groupname library macro osname resource systemname username article book chapter part refentry section journal series set manuscript service trade registered copyright all global local preferred normal singular startofrange endofrange