B. Architecture 1) Overview: There were two features that were considered extremely important by the developers to include in the MREP design. These features include: 1) a version control system that provides configuration control over model source code and 2) complete flexibility regarding output formats. The first of these features was a response to an absence of model standards (such as SBML) in the storage of source code. The most common model development languages represented in the MREP are anticipated to be C, C++, Java, and Matlab. To maintain control in a language-free environment, using a version control element was deemed essential.