Stratix10 Soc

Hi, I am interested in Stratix10 Soc Development Board. Need more information on the following:
1) When i get the board, i will also get the EDS. Whats the license type and how long can i use the EDS for?
2) What is the use of Arm DS since i already have the EDS?
3) What is the licensing of Arm DS like? Floating? and how long is the license valid for?

Thanks