Def isl(x) == InjCase(x; y. true; z. false)

is mentioned by

Def islocal(k) == isl(k)	[islocal]
Def isrcv(k) == isl(k)	[isrcv]

In prior sections: union

Try larger context: EventSystems IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html