Abstract
A description is given of the PM logic modelling language. PM forms part of a knowledge-based system used to construct computable specifications of linear programming models. In addition to serving as input to the model construction process, a PM specification is used to infer problem details. A simple example that illustrates PM's representational ability is given. The choice of a logic-based language was motivated by the need for a semantically precise declarative problem specification language that supports inference.<>

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