CelleratorML provides a way of storing Cellerator Models, including initial conditions and parameter values, as ASCII text files, using XML.
CellzillaML is an extension of CelleratorML that allows one to store Cellzilla models, including cell center or tissue description parameters.
All Cellerator reactions are represented in MathML. The entire MathML language is allowed, and in fact, is required, to represent Mathematica expressions. Cellerator identifiers that contain characters in Mathematica's extended character set (ISO8559-1) are represented by their ASCII escape codes.
A more detailed description of CelleratorML and CellzillaML is given in the spec link below.