Declarative learning is generally accomplished by an IDeclarativeLearningModule. Since the learning theories evolve faster than the rest of the architecture, there are significant differences between the various implementations and their expectations.
DefaultDeclarativeLearningModule4 provides the ACT-R 4 style of base-level learning and associative learning. It expects that the chunks created by the installed declarative module support the ISubsymbolicChunk4 interface, as well the associative linkage system to be the DefaultAssociativeLinkageSystem (which creates Link4 associative links).
Note: Theoretically outdated. Limited support available.
DefaultDeclarativeLearningModule6 extends the version for 4 by replacing the associative linkage system and providing an additional parameter for the MaximumAssociativeStrength.