(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)