class
- cartridge
- cdrom
- disk
- tape
moreinfo
- none
- refentry
rep
- norepeat
- repeat
choice
- opt
- plain
- req
language
modespec
- BMP
- CGM-BINARY
- CGM-CHAR
- CGM-CLEAR
- DITROFF
- DVI
- EPS
- EQN
- FAX
- GIF
- GIF87a
- GIF89a
- IGES
- JPEG
- JPG
- linespecific
- PCX
- PIC
- PNG
- PS
- SGML
- SVG
- TBL
- TEX
- TIFF
- WMF
- WPG
mousebutton
- none
- refentry