Public Open Space in NYU 2031

According to a NYU 2031 comparative diagram of existing vs. proposed public open space, pictured below, the WSV Sasaki Garden is not considered public open space.  Also, the Garden is not listed in the POPS (Privately Owned Public Open Space) maintained at http://www.nyc.gov/html/dcp/html/pops/pops_inventory.shtml.
  This inventory public open space inventory is based on Privately Owned Public Space: The New York City Experience, Jerold S. Kayden, the New York City Department of City Planning and the Municipal Art Society of New York (John Wiley & Sons, 2000).

NYU 2031: Existing Public Open Space vs Proposed Public Open Space (source)