Def da-outlinks(da;i)
Def == mapfilter(k.da-outlink-f(da;k);k.has-src(i;k);fpf-dom-list(da))

is mentioned by

Thm* ltg:(IdLnkIdType), i:Id. (ltg  da-outlinks(;i))  False	[da-outlinks-empty]
Def ma-outlinks(M;i) == da-outlinks(1of(2of(M));i)	[ma-outlinks]

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