--ifdocbook
process @ifdocbook and @docbook even if not generating Docbook.
--ifhtml
process @ifhtml and @html even if not generating HTML.
--ifinfo
process @ifinfo even if not generating Info.
--ifplaintext
process @ifplaintext even if not generating plain text.
--iftex
process @iftex and @tex; implies --no-split.
--ifxml
process @ifxml and @xml.
--no-ifdocbook
do not process @ifdocbook and @docbook text.
--no-ifhtml
do not process @ifhtml and @html text.
--no-ifinfo
do not process @ifinfo text.
--no-ifplaintext
do not process @ifplaintext text.
--no-iftex
do not process @iftex and @tex text.
--no-ifxml
do not process @ifxml and @xml text.
Also, for the --no-ifFORMAT options, do process @ifnotFORMAT text.
The defaults for the @if... conditionals depend on the output format: if generating HTML, --ifhtml is on and the others are off; if generating Info, --ifinfo is on and the others are off; if generating plain text, --ifplaintext is on and the others are off; if generating XML, --ifxml is on and the others are off.