Documentation for meta commands?

Where can I get documentation for the currently available meta commands (see User's Guide 8.16, p. 82)?

Thanks,
-- David McFarlane, Professional Faultfinder

OK, I stumbled across an example of a meta command here ([URL]http://www.empirisoft.com/Support/showthread.php?t=115&highlight=meta[/URL]) and mention of a meta command sample here ([URL]http://www.empirisoft.com/directrt/help/_helpcontents.htm?directrt_samples_v2006_meta_commands.htm[/URL]). Any further documentation of meta commands?

Thanks,
-- David McFarlane, Professional Faultfinder