It’s a nifty string matching type language. BigFix uses the Posix version
https://developer.bigfix.com/relevance/reference/regular-expression.html
q: (it, case insensitive regex “Microsoft Office.*” = it) of (“Microsoft Office 365”; “Microsoft Office 2016”; “Microsoft Office 2012”; “Microsoft Office 2000”; “Open Office”; “microsoft office 2013”)
A: Microsoft Office 365, True
A: Microsoft Office 2016, True
A: Microsoft Office 2012, True
A: Microsoft Office 2000, True
A: Open Office, False
A: microsoft office 2013, True
For more relevance stuff, you should check http://developer.bigfix.com
Especially the Relevance Tutorial.