CPT is an abbreviation for conditional probability table (also known as “link matrix”), which is the contingency table of conditional probabilities stored at each node, containing the probabilities of the node given each configuration of parent values.  Sometimes CPT is used to refer to the deterministic function table of a node, since the node's conditional probabilities can easily be found from that.  It is a form of node relation, so you use the table dialog box to change or view it.

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