XMLMath - XML-Based Mathematical Expression Evaluator

Xmlmath is a combination of both an xml-based expression language and an interpreter for these xml files. The expressions xmlmath evaluates are mathematical, logical, textual, or a combination.

For example, to compute the result of 1 + 1, you would write:

<expression xmlns="http://xmlmath.org/1.0">
  <add>
    <long value="1"/>
    <long value="1"/>
  </add>
</expression>

Xmlmath's expression language comes with a fair set of mathematical operators, but also provides operators for conditional evaluation, subroutine-like functionality and document-import features.