A new Obama administration privacy policy out Friday explains how the government will gather the user data of online visitors to WhiteHouse.gov, mobile apps and social media sites. It also clarifies that online comments, whether tirades or tributes, are in the open domain.

The Obama Administration promises not to sell the data of online visitors. But it cannot make the same assurances for users who go to third-party White House sites on Facebook, Twitter or Google Plus.

The new policy statement makes it easier for readers to now understand that the White House stores the date, time and duration of online visits; the originating Internet Protocol address; how much data users transmit from WhiteHouse.gov to their computers; and more.

Reviews from privacy experts — who have been watching the policy revisions closely — were mixed.