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Dear All,

I have a simple SBML model

<sbml xmlns="http://www.sbml.org/sbml/level2"
xmlns:math="http://www.w3.org/1998/Math/MathML" level="2" version="1">
<model id="MyModel">
</model>
</sbml>

Now using Python I do:

sbml='''<sbml xmlns="http://www.sbml.org/sbml/level2"
xmlns:math="http://www.w3.org/1998/Math/MathML" level="2" version="1">
<model id="MyModel">
</model>
</sbml>'''

import libsbml
read = libsbml.SBMLReader()
read.setSchemaValidationLevel(libsbml.XML_SCHEMA_VALIDATION_FULL)
d = read.readSBMLFromString(sbml)

print d.toSBML()

<sbml xmlns="http://www.sbml.org/sbml/level2"
xmlns:math="http://www.w3.org/1998/Math/MathML"
xmlns:math="http://www.w3.org/1998/Math/MathML" level="2" version="1">
<model id="MyModel"/>
</sbml>

i.e. it prints out the MathML namespace twice, giving an invalid model.

(Using libsbml 2.3.4 under linux)

Thanks

Colin