There are MathML and OpenMath elements which require special attention. Mainly because there are elements constructed differently in MathML as they are in OpenMath and because some elements have no equivalent in both standards. Such cases must be well understood before starting to implement any translator. We shall look at these cases and propose a reliable method for overcoming the differences and implementing an efficient solution. We will mention bound variables, element attributes and constants representation.
There exist elements in both standards which represent the same mathematical concept, but where the syntactical structure is different. The following list shows these elements: matrices, limits, integrals, definite integrals, differentiation, partial differentiation, sums, products, intervals, selection from a vector and selection from a matrix.