NAhE (http://www.lojban.org/en/publications/reference_grammar/chapter15.html)

Scalar negators, modifying a selbri or a sumti to a value other than the one
stated, the opposite of the one stated, etc. Also used with following BO to
construct a sumti qualifier; see LAhE.

ta na'e blanu zdani That is-a-non- blue house. That is a house which is other
than blue.

