16. A computing device for associating multiple domains within a block diagram model, the computing device comprising: a processor for executing: a plurality of partitioning blocks for use in defining a first region and a second region of a block diagram model; a first mechanism for associating a first domain with the first region of the block diagram model, the first domain comprising one or more nodes having a first function representing parameters associated with the one or more nodes of the first domain, parameters specific to the first domain being passed to the first region of the block diagram model without being passed to the second region of the block diagram model using the first function; and a second mechanism for associating a second domain with the second region of the block diagram model, the second domain comprising one or more nodes having a second function representing parameters associated with the one or more nodes of the second domain, parameters specific to the second domain being passed to the second region of the block diagram model without being passed to the first region of the block diagram model using the second function.
16. A computing device for associating multiple domains within a block diagram model, the computing device comprising: a processor for executing: a plurality of partitioning blocks for use in defining a first region and a second region of a block diagram model; a first mechanism for associating a first domain with the first region of the block diagram model, the first domain comprising one or more nodes having a first function representing parameters associated with the one or more nodes of the first domain, parameters specific to the first domain being passed to the first region of the block diagram model without being passed to the second region of the block diagram model using the first function; and a second mechanism for associating a second domain with the second region of the block diagram model, the second domain comprising one or more nodes having a second function representing parameters associated with the one or more nodes of the second domain, parameters specific to the second domain being passed to the second region of the block diagram model without being passed to the first region of the block diagram model using the second function. 19. The computing device of claim 16 , further comprising a first parameterization component, the first parameterization component being associated with the first domain.