S2AP랑 S2DS랑 햇갈려서 찾아 봤더니 S2AP는 S2DS와 S2E를 포함한 것을 말하는군요.
참조: http://www.springsource.com/products/suite/applicationplatform
The SpringSource Application Platform is an end-to-end platform that is designed
from the ground up for complete portability and scalability for today’s data
center and for next-generation virtualized, grid, and