(CDS) A model of programming language terms developed in the coNText of constructing fully abstract semaNTics for sequeNTial languages. A CDS is a 4-tuple (C,V,E,|-) where C is a cell, V is a value, E is an eveNT and |- is an "enabling relation". An eveNT is a cell and a value. A cell C is "enabled" by a set of eveNTs S if S |- C. A state is a set of eveNTs which are consisteNT in that the values they give for any cell are all equal. Every cell in a state is enabled. [G. Berry, P.-L. Curien, "Theory and practice of sequeNTial algorithms: the kernel of applicative language CDS", Algebraic methods in semaNTics, CUP 1985]. (1994-11-30)