  We present a general model-independent formalism of measuring CP and CPT
violating parameters through time-ordered integrated rates of correlated decays
of $C=\pm 1$ entangled states of neutral pseudoscalar mesons. We give the
general formulae of CP and CPT violating parameters in terms of four measurable
asymmetries defined for the time-ordered integrated rates, applicable to all
kinds of decay product. Two special cases which are often realized in
experiments are discussed specifically.
