Figure 6.

Class diagram of NEST classes and functions. Simplified class diagram for embedding the Clopath (Left) and Urbanczik-Senn rule (Right) in the NEST infrastructure. The code is distributed across the nestkernel and neuron models. nestkernel contains the base class Node of all neurons models. Models that support ordinary STDP are derived from the Archiving_Node, models that can use the Clopath synapse (aeif_psc_delta_clopath and hh_psc_alpha_clopath) or Urbanczik-Senn synapse (pp_cond_exp_mc_urbanczik) are derived from the Clopath_Archiving_Node or the Urbanczik_Archiving_Node, respectively. The latter add the required functions for storing and managing the history of continuous quantities. The model pp_cond_exp_mc_urbanczik requires a helping class pp_urbanczik_parameters because the Urbanczik_Archiving_Node needs to access functions and parameters that are specific to the neuron model and therefore not located in the Urbanczik_Archiving_Node to keep its implementation more general.