Signal Grey

I have been considering a project that would involve defining a mathematical procedure preferably in a format like XML. The definition would need to include the definition of variables/inputs, logic/sequence and mathmatical equations.

The calculation would then be executed by a programme based on user inputs. The resulting calculation would then be saved (again preferably in an XML format) for further editing if required and/or printed/exported (calculation report) to a number of formats (i.e. latex, pdf, html etc).

I have been trying to locate any pre-existing components that may be able to fulfill the about requirements. MathML, LaTeX, OpenXM/OpenMath all seem to fulfill parts of the requirements.

I would like to avoid having more than one definition of the equations in the xml definition i.e. one for the actual calculation and one for visual representation. To avoid this I either need a library that can convert Latex/MathML into executable code or one that can execute the code directly from the Latex/MathML input.

Would appreciate any input here. In the mean time I will continue my search.