To make navigating RDA a bit easier (until the online version becomes available), there's now also a browsable MARC index:
http://www.biblio.tu-bs.de/db/wtr/page.php?urG=MRC&urS=020 Replace 020 at the end by whatever tag you want to begin browsing. Or a MARC field label instead, like urS=main entry The rule text will then include the MARC tags like this: 10.2.2 Preferred Name for the Family Core element MARC: 100 Main entry -- Personal name $a Personal name (i1 = 3) (also: 700$a / 800 $a) All tags found in RDA App. D are included. B.Eversberg