Useful Links:
- http://download.oracle.com/tech/blaf/specs/globalhelp_flow.html
- http://docs.oracle.com/cd/E18727_01/doc.121/e12893/T174296T174304.htm#I_htx2Dtrees
- http://download.oracle.com/tech/blaf/specs/help.html#contextualhelp
- http://docs.oracle.com/cd/B53825_08/current/acrobat/121devg.pdf (Page 556)