I have been reading some literature on molecular energy prediction using machine learning techniques and I have noticed that one of the input parameters in many of the available models is "chirality". In these works "chirality" is defined as an atom feature. Meaning that for every atom in the molecule, a one-hot or null vector is used to assign R/S to the atom. As far as I understand, chirality is a molecular property and only the atom which is the chiral center can be assigned R/S.
I was wondering if my understanding is correct and if not, what am I missing. Thanks!
PS: One such a paper is this.