There exists a variety of formats for representing optimisation models, each with varying degrees of
support on optimisation platforms. Existing formats are also unsuitable for Internet distributed
computing technologies, due not only to their syntax but also to limited degrees of portability. This
paper describes an XML based algebraic mark-up language for representing optimisation models. The
principal aim of the language is to provide an abstracted representation format with sufficient
generality to capture the structure of optimisation models, and which can easily be ported to existing
formats, and is usable in an Internet computing environment.