Analysis of information sources in references of the Wikipedia article "Tilakkhaṇa" in Indonesian language version.
All phenomenal existence [in Buddhism] is said to have three interlocking characteristics: impermanence, dukkha and lack of soul, that is, something that does not change.
(...) the three characteristics of samsara/sankhara (the realm of rebirth): anicca (impermance), dukkha (pain) and anatta (no-self).Pemeliharaan CS1: Status URL (link)
dukkha (unsatisfactoriness or suffering) (....) In the Introduction I wrote that dukkha is probably best understood as unsatisfactoriness.
(...) anatta is the doctrine of non-self, and is an extreme empiricist doctrine that holds that the notion of an unchanging permanent self is a fiction and has no reality. According to Buddhist doctrine, the individual person consists of five skandhas or heaps - the body, feelings, perceptions, impulses and consciousness. The belief in a self or soul, over these five skandhas, is illusory and the cause of suffering.[c] Richard Gombrich (2006). Theravada Buddhism. Routledge. hlm. 47. ISBN 978-1-134-90352-8.
(...) Buddha's teaching that beings have no soul, no abiding essence. This 'no-soul doctrine' (anatta-vada) he expounded in his second sermon.