4.4 The Structure of

The diffusion modeling framework *PROMIS-NT* has been built on top of the basic
input/output, equation solving and transient time step control modules of
the diffusion simulator *DIFFUS*. Therefore the discretization function of
a number of built-in diffusion models were replaced by the discretization
functions for the differential equation systems (4.1) -
(4.8). Interface structures to the *Algorithm Library* have been introduced
within these discretization functions as well as for the initialization and
post-processing of quantities, the process temperatures modeling, quantity
definition and other strategic algorithms for the diffusion modeling. A
set of *PROMIS-NT* specific *MDL* ` Parameter` classes, operators,
functions, and

1999-11-14