Mutually agreeable land swaps, timing for withdrawel, airspace rights, water rights, etc. The basis for the talks have been set by UNSC Resolutions 242, 446, 452, 465, 476,by the Fourth Geneva Convention and by the Quartet. 1967 borders. No taking over land by conquest. No colonizing land that is not yours. Even Olmert acknowledged this.
Law expanding definition of terrorist activity passes first Knesset reading (Haaretz)
from the article: Palestinians to decide on direct talks in two days, PA official says