The eighteen aspects of emptiness are first listed in UT22084-026-001-360 (see also UT22084-026-001-361) and are elaborated further (though not individually elucidated) in the passage following a later list in UT22084-026-001-1568.

These are typically enumerated as (1) inner emptiness, (2) outer emptiness, (3) inner and outer emptiness, (4) the emptiness of emptiness, (5) great emptiness, (6) the emptiness of ultimate reality, (7) the emptiness of the compounded, (8) the emptiness of the uncompounded, (9) the emptiness of what transcends limits, (10) the emptiness of no beginning and no end, (11) the emptiness of nonrepudiation, (12) the emptiness of a basic nature, (13) the emptiness of all dharmas, (14) the emptiness of its own mark, (15) the emptiness of not apprehending, (16) the emptiness of a nonexistent thing, (17) the emptiness of an intrinsic nature, and (18) the emptiness that is the nonexistence of an intrinsic nature.

These are enumerated at UT22084-029-001-293: (1) inner emptiness, (2) outer emptiness, (3) inner and outer emptiness, (4) the emptiness of emptiness, (5) great emptiness, (6) the emptiness of ultimate reality, (7) the emptiness of the compounded, (8) the emptiness of the uncompounded, (9) the emptiness of what transcends limits, (10) the emptiness of no beginning and no end, (11) the emptiness of nonrepudiation, (12) the emptiness of a basic nature, (13) the emptiness of all dharmas, (14) the emptiness of its own mark, (15) the emptiness of not apprehending, (16) the emptiness of a nonexistent thing, (17) the emptiness of an intrinsic nature, and (18) the emptiness that is the nonexistence of an intrinsic nature.

These are enumerated as: (1) inner emptiness, (2) outer emptiness, (3) inner and outer emptiness, (4) the emptiness of emptiness, (5) great emptiness, (6) the emptiness of ultimate reality, (7) the emptiness of the compounded, (8) the emptiness of the uncompounded, (9) the emptiness of what transcends limits, (10) the emptiness of no beginning and no end, (11) the emptiness of nonrepudiation, (12) the emptiness of a basic nature, (13) the emptiness of all dharmas, (14) the emptiness of its own mark, (15) the emptiness of not apprehending, (16) the emptiness of a nonexistent thing, (17) the emptiness of an intrinsic nature, and (18) the emptiness that is the nonexistence of an intrinsic nature.