This is an SBML importer for STEPS.
This importer has been written for a specific model (BIOMD0000000152.xml).
A Generalization of the importer is on the way from Ian https://github.com/iahepburn
Feel free to send patches or ask more details.
More info: STEPS http://steps.sourceforge.net/STEPS/Home.html
SBML http://sbml.org/