The procedural knowledge , or agents, or codelets (in the case of Copycat) of BAsCET have an urgency value (UV), that indicates the priority of launching one agent preferably to another one. The temperature mechanism influence on the probability that the agent has to be chosen. This urgency value is relative to those of the other agents.
While running, an agent accesses to the Concept Network node that launched it (called father node) and to incoming and outcoming links of this node. But agents mainly work on Blackboard's objects. They can find there an instance of a Concept Network node, read their attributes, and especially create such objects. Creating an instance of a Concept Network node activate this node (its activation value will be set to its maximum value). Agents can also change the happiness of an object, thus giving an opinion on the object's validity.